Aerodynamic locking device for a mobile platform

Abstract

A pneumatic locking device for a mobile platform includes a base frame, on which a packaging machine is placed. Four sets of wheel mechanisms are mounted on the longitudinal beams on both sides of the base frame. A locking mechanism is located near the wheel mechanisms. The locking mechanism includes a mounting frame with a cam support. The cam support is hinged to the middle of a downward-pressing cam. The upper end of the downward-pressing cam is hinged to the cylinder rod of a swing cylinder. The contour surface of the downward-pressing cam contacts a driven roller. The driven roller is hinged to one end of a support swing arm. The other end of the support swing arm is hinged to the mounting frame. The lower end of the support swing arm is hinged to a support plate. The support swing arm is also connected to one end of a tension spring, the other end of which is connected to the mounting frame. When the downward-pressing cam is in its initial position, the lowest point of the support plate is above the ground. When the swing cylinder drives the downward-pressing cam to swing downward, the driven roller synchronously presses the support swing arm downward, pressing the support plate firmly onto the ground. This invention increases the contact area between the packaging machine and the ground, reducing vibration and impact during packaging.

Description

Technical Field

[0001] This utility model relates to a pneumatic locking device for a mobile platform, belonging to the field of packaging machinery. Background Technology

[0002] The mobile platform carrying the packaging machine is equipped with wheels, which allow the packaging machine to move within the factory to meet flexible packaging needs. However, after docking with the corresponding workstation, the small contact area between the wheels and the ground causes significant mechanical vibration during packaging, affecting the weighing accuracy and causing large weighing errors. To prevent the entire mobile platform from shaking during the operation of the packaging machine, liftable support feet are generally installed at the four corners of the mobile platform to increase the friction between the mobile platform and the ground. Manually operated lifting mechanisms result in high labor intensity, while hydraulic lifting mechanisms cause problems such as complex structure, high cost, and large maintenance workload. Utility Model Content

[0003] To address the problems of high operational intensity and complex structure in existing mobile platform locking mechanisms, this utility model provides a pneumatic locking device for mobile platforms. It includes a base frame, on which a packaging machine is placed. Four sets of wheel mechanisms are mounted on the longitudinal beams on both sides of the base frame. A locking mechanism is located near the wheel mechanisms. The locking mechanism includes a mounting frame connected to the base frame. A cam support is mounted on the mounting frame, and the cam support is hinged to the middle of a downward-pressing cam. The upper end of the downward-pressing cam is hinged to the cylinder rod of a swing cylinder. The cylinder body is hinged to the mounting bracket. The contour surface of the pressing cam contacts the driven roller. The driven roller is hinged to one end of the support swing arm. The other end of the support swing arm is hinged to the mounting bracket. The lower end of the support swing arm is hinged to the support plate. The support swing arm is also connected to one end of the tension spring. The other end of the tension spring is connected to the mounting bracket. When the pressing cam is in the initial position, the lowermost end of the support plate is higher than the ground. When the swing cylinder drives the pressing cam to swing downward, the driven roller synchronously presses the support swing arm downward to press the support plate firmly onto the ground.

[0004] The tension springs are respectively installed on both sides of the support arm, and are connected to the mounting bracket through adjusting screws.

[0005] When the swing cylinder drives the downward cam to swing down to its position, the angle α between the normal of the contact point between the downward cam and the driven roller and the direction of movement of the driven roller is between 0° and 20°.

[0006] The beneficial effects of this utility model are: By utilizing the locking mechanism located near the wheel mechanism, the support plate is lifted off the ground during movement. During packaging, the downward pressing cam converts the force applied by the swing cylinder into an amplified vertical force, which stabilizes the support plate on the ground. This increases the contact area between the equipment and the ground, reduces vibration and impact during the packaging process, and thus improves weighing accuracy and enhances the reliability of the equipment. Attached Figure Description

[0007] Figure 1 This is a three-dimensional isometric view of this utility model.

[0008] Figure 2 This is a schematic diagram of the locking mechanism.

[0009] Figure 3 This is a schematic diagram of the locking mechanism in operation.

[0010] Figure 4 This is a schematic diagram of the pressure angle when the locking mechanism is working. Detailed Implementation

[0011] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the embodiments of this utility model are described in detail below with reference to the accompanying drawings. The embodiments are exemplary and intended to explain this utility model, but should not be construed as limiting this utility model.

[0012] The purpose of this invention is to provide a pneumatic locking device for a mobile platform. (See also...) Figures 1-3It includes a base frame 1, on the upper end of which a packaging machine is placed. Four sets of wheel mechanisms 2 are mounted on the longitudinal beams on both sides of the base frame 1. A locking mechanism 3 is located near the wheel mechanisms 2. The locking mechanism 3 includes a mounting frame 31 connected to the base frame 1. A cam support 39 is mounted on the mounting frame 31. The cam support 39 is hinged to the middle of a downward pressing cam 38. The upper end of the downward pressing cam 38 is hinged to the cylinder rod of a swing cylinder 32. The cylinder body of the swing cylinder 32 is hinged to the mounting frame 31. The contour surface of the downward pressing cam 38 is connected to the driven roller 3. 4. The driven roller 34 is hinged to one end of the support arm 33, and the other end of the support arm 33 is hinged to the mounting bracket 31. The lower end of the support arm 33 is hinged to the support plate 35. The support arm 33 is also connected to one end of the tension spring 37, and the other end of the tension spring 37 is connected to the mounting bracket 31. When the pressing cam 38 is in the initial position, the lowermost end of the support plate 35 is higher than the ground. When the swing cylinder 32 drives the pressing cam 38 to swing downward, the driven roller 34 synchronously presses the support arm 33 downward to press the support plate 35 firmly onto the ground. The tension springs 37 are respectively arranged on both sides of the support arm 33 and are connected to the mounting bracket 31 through adjusting screws 36. When the locking mechanism 3 is working, during the swinging process of the swing cylinder 32 driving the pressing cam 38 to swing, the driven roller 34 moves along the contour curve of the pressing cam 38, which is converted into a downward force to press the support arm 33 downward to swing, so that the support plate 35 is pressed firmly onto the ground. When the packaging machine needs to be moved, the swing cylinder 32 drives the downward cam 38 to swing back to the initial position, and the support plate 35 is lifted off the ground by the tension spring 37.

[0013] Furthermore, when the swing cylinder 32 drives the downward cam 38 to swing downward to its final position, the angle α between the normal of the contact point between the downward cam 32 and the driven roller 34 and the direction of movement of the driven roller 34 is between 0° and 20°. The transmission efficiency is high within this pressure angle range. In this embodiment, the pressure angle is 15°. When the downward cam 38 swings to its final position, the swing cylinder 32 can use a small output force to generate a large clamping force on the support plate 35.

[0014] Furthermore, the wheel mechanism 2 includes two sets of diagonally arranged driving wheels and two sets of diagonally arranged driven wheels. Both the driving wheels and driven wheels are controlled by a rotary motor to control their rotation direction, and the driving wheels are also controlled by a locating motor to control their movement.

Claims

1. A mobile platform pneumatic locking device comprising a chassis (1), characterized in that: The packaging machine is placed on the upper end of the base frame (1). Four sets of wheel mechanisms (2) are provided on the longitudinal beams on both sides of the base frame (1). A locking mechanism (3) is provided near the wheel mechanism (2). The locking mechanism (3) includes a mounting frame (31). The mounting frame (31) is connected to the base frame (1). A cam support (39) is provided on the mounting frame (31). The cam support (39) is hinged to the middle of the pressing cam (38). The upper end of the pressing cam (38) is hinged to the cylinder rod of the swing cylinder (32). The cylinder body of the swing cylinder (32) is hinged to the mounting frame (31). The contour surface of the pressing cam (38) is connected to the driven roller (34). The driven roller (34) is hinged to one end of the support arm (33), and the other end of the support arm (33) is hinged to the mounting bracket (31). The lower end of the support arm (33) is hinged to the support plate (35). The support arm (33) is also connected to one end of the tension spring (37), and the other end of the tension spring (37) is connected to the mounting bracket (31). When the pressing cam (38) is in the initial position, the lowermost end of the support plate (35) is higher than the ground. When the swing cylinder (32) drives the pressing cam (38) to swing downward, the driven roller (34) synchronously presses the support arm (33) to swing downward and press the support plate (35) firmly on the ground.

2. The mobile platform pneumatic locking device of claim 1, wherein: The tension springs (37) are respectively arranged on both sides of the support arm (33), and are connected to the mounting bracket (31) through the adjusting screw (36).

3. The mobile platform pneumatic locking device of claim 1, wherein: When the swing cylinder (32) drives the downward cam (38) to swing downward to the position, the angle α between the normal of the contact point between the downward cam (38) and the driven roller (34) and the direction of movement of the driven roller (34) is between 0° and 20°.

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