A movable arc-shaped rack for transporting solid rocket motors

Abstract

A movable arc-shaped frame for supporting a solid rocket motor, with movable roller assemblies fixed on both sides of the arc-shaped frame. The height from the lower end face of the support sleeve of each movable roller assembly to the lower surface of the arc-shaped frame is slightly greater than the maximum outer dimension of the universal roller. The lower ends of the two connecting rods of the roller connecting frame are respectively inserted into the respective support sleeves; two universal rollers are respectively installed at the lower ends of the connecting rods. The section of the roller connecting frame extending out of the support sleeve is the working stroke section of the roller connecting frame; the length of this working stroke section is the same as the maximum outer dimension of the universal roller. A static position buckle and a ball hinge joint are both fixed on the side surface of the arc-shaped frame; the ball hinge joint is located below the cross beam of the roller connecting frame. The movable arc-shaped frame proposed by the present invention realizes the flexible movement of the arc-shaped frame in the workshop, realizes the handling of the solid rocket motor, saves manpower, reduces the labor intensity of the staff, and effectively improves the production efficiency.

Description

Technical Field

[0001] The present invention relates to the field of solid rocket motor manufacturing, and more particularly to a movable arc-shaped frame for handling horizontally placed solid rocket motors. Background Art

[0002] Since the arc-shaped frames used for horizontally placing large solid rocket motors are large in volume and heavy in mass, and the arc-shaped frames are carried back and forth in the workshop. Most importantly, during the process of fine-tuning the placement position before placing the combustion chamber, it is difficult for multiple operators to manually push the arc-shaped frames. Generally, the mass of the arc-shaped frame used for a solid rocket motor with a diameter of 2 m or more is 300 kg or more. And to ensure the reliability of support, at least two or more arc-shaped frames are required to support a large solid rocket motor during the horizontal placement process. During the handling process, manual handling is generally adopted, which is time-consuming and laborious, with high labor intensity and low efficiency of workers. There is also the use of lifting equipment for handling, which requires the equipped special crane, increasing the production cost. And the process of hoisting each arc-shaped frame one by one also takes a long time, with low production efficiency. The use of the special crane is also limited by the conditions of the workshop. Summary of the Invention

[0003] In order to overcome the deficiencies in the prior art, such as high labor intensity, low efficiency when moving and placing the support of solid rocket motors, and being limited by the conditions of the workshop when using lifting equipment, which also increases the production cost, the present invention provides a movable arc-shaped frame for handling solid rocket motors.

[0004] The present invention includes an arc-shaped frame and a pair of movable roller assemblies, and each movable roller assembly is respectively fixed on the surfaces on both sides of the arc-shaped frame. Each of the movable roller assemblies includes a pressure bar, a stationary position buckle, two support sleeves, two universal rollers, a spherical hinge joint, and a roller connecting frame. Among them, the two support sleeves are fixedly arranged in parallel on the lower end of one side surface of the arc-shaped frame, and the height of the lower end surface of the support sleeve from the lower surface of the arc-shaped frame is slightly greater than the maximum outer dimension of the universal roller. The shape of the roller connecting frame is in the shape of a "door", and there is a downward pressure fulcrum protruding from the side surface of the cross beam at the center of the length of the cross beam of the roller connecting frame. The lower ends of the two connecting rods of the roller connecting frame are respectively inserted into the respective support sleeves; the two universal rollers are respectively installed at the lower ends of the respective connecting rods. The section of the roller connecting frame extending out of the support sleeve is the working stroke section of the roller connecting frame; the length of the working stroke section is the same as the maximum outer dimension of the universal roller.

[0005] The stationary position buckle and the spherical hinge joint are both fixed on the side surface of the arc-shaped frame and are located on the same vertical plane; the spherical hinge joint is located below the cross beam of the roller connecting frame; the included angle between the connection line between the center of the spherical hinge joint and the axis of the downward pressure fulcrum and the horizontal plane is 45°.

[0006] The movable arc-shaped frame proposed by the present invention realizes the flexible movement of the arc-shaped frame in the workshop without affecting its basic function of supporting solid rocket engines.

[0007] The movable arc-shaped frame adopts a traditional metal structure. There are 2 universal rollers at each end of the arc-shaped frame. Through each universal roller, the movement of the arc-shaped frame relative to the ground after being supported and lifted by the rollers is ensured, as well as the movement of the arc-shaped frame in different directions. When the arc-shaped frame does not need to move, each universal roller is in a retracted state and has no contact with the ground. The bottom of the arc-shaped frame is directly placed on the ground to effectively support the horizontal placement of the solid rocket engine; when the arc-shaped frame needs to be moved, using the lever principle, each universal roller is extended towards the ground through the roller connecting frame and the pressure rod, the bottom of the arc-shaped frame leaves the ground, and pushing the arc-shaped frame enables it to move in the workshop, realizing the handling of the solid rocket engine.

[0008] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0009] 1. It can easily move an arc-shaped frame weighing more than 300 kg without the help of external mechanical equipment;

[0010] 2. Originally, it took 4 to 6 people to manually lift an arc-shaped frame, but now only 2 people are needed to complete it.

[0011] 3. While the operation is simple and labor-saving, it can also reduce the time used for manual pushing and lifting. Generally, an arc-shaped frame weighing less than 300 kg is carried manually, and for those weighing more than 300 kg, a lifting tool and a crane in the workshop are required for lifting. Lifting in the workshop includes processes such as installing the lifting tool and operating the crane by personnel. Moving about 20 m takes more than 30 minutes. Using the movable arc-shaped frame, the time can be controlled within 5 minutes. It can effectively improve efficiency Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of the present invention.

[0013] Figure 2 is Figure 1 the side view of

[0014] Figure 3 is a schematic diagram of the state before the rollers are lifted.

[0015] Figure 4 is a schematic diagram of the state after the rollers are lifted.

[0016] In the figure: 1. Pressure rod; 2. Static position buckle; 3. Support sleeve; 4. Universal roller; 5. Ball hinge joint; 6. Arc-shaped frame; 7. Roller connecting frame; 8. Moving position buckle; 9. Support sleeve; 10. Lower pressure fulcrum. Detailed implementation mode

[0017] This embodiment is a movable arc-shaped frame for carrying solid rocket engines, which consists of an arc-shaped frame 6 and a pair of movable roller assemblies, and the movable roller assemblies are respectively fixed on the surfaces on both sides of the arc-shaped frame. The structures of the movable roller assemblies are the same, and one of them will be described in detail as an example.

[0018] The movable roller assembly includes a pressure rod 1, a stationary position buckle 2, two support sleeves 3, two universal rollers 4, a spherical hinge joint 5, and a roller connecting frame 7. Among them, the two support sleeves 3 are fixed in parallel on the lower end of one side surface of the arc-shaped frame, and the height of the lower end surface of the support sleeve from the lower surface of the arc-shaped frame is slightly greater than the maximum outer dimension of the universal roller. The outer shape of the roller connecting frame is in the shape of a "door", and there is a downward pressure fulcrum 10 protruding from the surface of the cross beam at the center of the length of the cross beam of the roller connecting frame; the two vertical rods in the roller connecting frame are connecting rods; the lower ends of the connecting rods are respectively inserted into the support sleeves 3; the two universal rollers are respectively installed at the lower ends of the connecting rods, and the lowest points of the installed universal rollers are slightly higher than the lower surface of the arc-shaped frame. The section of the roller connecting frame 7 extending out of the support sleeve is the working stroke section of the roller connecting frame, and the length of the working stroke section is the same as the maximum outer dimension of the universal roller.

[0019] The stationary position buckle and the spherical hinge joint 5 are both fixed on the side surface of the arc-shaped frame and are located on the same vertical plane, and the position of the spherical hinge joint 5 is below the cross beam of the roller connecting frame 7, so that the connection line between the center of the spherical hinge joint and the axis of the downward pressure fulcrum 10 forms an angle of 45° with the horizontal plane. The lower end of the pressure rod is sleeved on the spherical hinge joint, and the pressure rod can rotate around the spherical hinge joint; the upper end of the pressure rod is embedded in the stationary position buckle.

[0020] During operation, the upper end of the pressure rod 1 is taken out of the stationary position buckle 2 and rotated counterclockwise downward around the spherical hinge joint 5. When the pressure rod rotates counterclockwise to 45°, it contacts the downward pressure fulcrum 10 fixed on the cross beam of the roller connecting frame 7. During the continuous counterclockwise rotation of the pressure rod, the pressure rod applies force to the downward pressure fulcrum, driving the roller connecting frame to move downward, and further causing the universal roller 4 installed at the lower end of the roller connecting frame to move downward and contact the ground. When the pressure rod rotates counterclockwise by 90° to reach the horizontal position, the pressure rod is embedded in the moving position buckle 8 to fix the position of the pressure rod; at this time, the working stroke section of the roller connecting frame completely enters the support sleeve 3, making the lower surface of the arc-shaped frame higher than the universal roller, lifting the arc-shaped frame, and realizing the easy movement of the arc-shaped frame to adjust the position in the workshop.

[0021] In this embodiment, the universal roller 4 is fixedly connected to the roller connecting frame 7, and the roller connecting frame 7 connects the two rollers at the same height position line through the support sleeve 9. The pressing rod 1 is connected to the end face of the arc-shaped frame through the spherical hinge joint 5. The pressing rod 1 can rotate 90° around the spherical hinge joint 5. In the fixed placement state of the arc-shaped frame, the pressing rod 1 is in a vertical state and is fixed at the static position buckle 2 of the arc-shaped frame. When the pressing rod rotates 90°, it is in a horizontal state and is fixed at the moving position buckle 8, and the arc-shaped frame is lifted and moved through the universal roller and the roller connecting frame 7 connected to the universal roller.

[0022] The roller is a standard part with a diameter of 50 mm. The length of the working stroke section is 50 mm. When the roller is in the lowered state, it only needs to ensure that the entire roller is exposed from the bottom surface of the arc-shaped frame to facilitate the rotation of the universal wheel. Therefore, in this state, only a vertical stroke of 50 mm of the roller connecting frame 7 is required.

Claims

1. A movable arc-shaped frame for carrying solid rocket motors, characterized in that, it includes an arc-shaped frame and a pair of movable roller assemblies, and each movable roller assembly is respectively fixed on the surfaces on both sides of the arc-shaped frame; each of the movable roller assemblies respectively includes a pressure bar, a stationary position buckle, two support sleeves, two universal rollers, a ball hinge joint, and a roller connecting frame; wherein, the two support sleeves are fixedly arranged in parallel at the lower end of one side surface of the arc-shaped frame; the lower ends of the two connecting rods of the roller connecting frame are respectively inserted into the support sleeves; the two universal rollers are respectively installed at the lower ends of the connecting rods; the section of the roller connecting frame extending out of the support sleeve is the working stroke section of the roller connecting frame; the stationary position buckle and the ball hinge joint are both fixed on the side surface of the arc-shaped frame and are located on the same vertical plane; the outer shape of the roller connecting frame is in the shape of a "door", and there is a downward pressure fulcrum protruding from the side surface of the cross beam at the center of the length of the cross beam of the roller connecting frame; the ball hinge joint is located below the cross beam of the roller connecting frame; the included angle between the connection line between the center of the ball hinge joint and the axis of the downward pressure fulcrum and the horizontal plane is 45°; the height of the lower end surface of the support sleeve from the lower surface of the arc-shaped frame is slightly greater than the maximum outer dimension of the universal roller; the length of the working stroke section is the same as the maximum outer dimension of the universal roller.

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