Rotary table of overhead working truck

Abstract

The utility model discloses an overhead working truck rotary table which comprises a rotary table body and a covering part installed on the rotary table body, a first action cylinder is installed on the rotary table body, and the extending end of the first action cylinder is connected with the covering part. A first mounting base is arranged on the covering part, a sliding groove is formed in the first mounting base, a second action cylinder is arranged on the covering part, the extending end of the first action cylinder is hinged to the extending end of the second action cylinder, and the hinge point between the first action cylinder and the second action cylinder is located in the sliding groove. According to the utility model, the force arm of the first action cylinder acting on the covering part can be changed according to different temperatures, so that the opening or closing process of the covering part becomes smoother.

Description

Technical Field

[0001] The utility model belongs to the field of special vehicle manufacturing, in particular to a turntable of an aerial work vehicle. Background Art

[0002] Existing aerial work vehicle covers all use one or more gas supports acting on the same hinge point in the same direction to realize the opening and closing of the cover. After unlocking, the cover is opened by the gas support, and closing the cover is to manually pull the cover down to the locked position.

[0003] When the temperature rises, the gas inside the gas support expands and the force of the gas support becomes larger. At this time, the opening of the cover will become rapid, which may cause danger. When the cover needs to be closed, it is difficult to pull the cover.

[0004] When the temperature drops, the gas inside the gas strut shrinks due to the cold, and the force applied becomes smaller. After the lock is released, it will be more difficult or even impossible to open the cover automatically. Utility Model Content

[0005] The utility model aims to provide a turntable for an aerial work vehicle to solve the technical problem that a cover is difficult to open or close due to the influence of temperature.

[0006] To achieve the above purpose, the specific technical solution of the utility model is as follows:

[0007] A turntable for an aerial work vehicle, comprising a turntable body and a cover installed on the turntable body, wherein a first actuating cylinder is installed on the turntable body, and an extended end of the first actuating cylinder is connected to the cover;

[0008] The cover is provided with a first mounting seat, the first mounting seat is provided with a slide groove, the cover is provided with a second actuating cylinder, the extending end of the first actuating cylinder is hinged with the extending end of the second actuating cylinder, and the hinge point between the first actuating cylinder and the second actuating cylinder is located in the slide groove.

[0009] Therefore, the utility model arranges a second actuating cylinder on the cover, and arranges the hinge point between the first actuating cylinder and the second actuating cylinder in the slide groove. In this way, when the temperature changes, the first actuating cylinder and the second actuating cylinder can be driven to make the hinge point slide in the slide groove. By changing the position of the hinge point, the force arm of the first actuating cylinder acting on the cover can be changed, so that the process of opening or closing the cover becomes smoother.

[0010] Furthermore, the turntable body is provided with a second mounting seat, and the fixed end of the first actuating cylinder is hinged on the second mounting seat.

[0011] Furthermore, a third mounting seat is provided on the cover, and the fixed end of the second actuating cylinder is hinged on the third mounting seat.

[0012] Furthermore, one end of the cover is hinged to the turntable body, and the other end of the cover is locked with the turntable body.

[0013] Furthermore, it also includes a temperature sensor, which is electrically connected to a control system, and the control system is electrically connected to the first cylinder and the second cylinder.

[0014] The utility model has the following advantages: the utility model can change the force arm of the first action cylinder acting on the cover according to different temperatures, so that the process of opening or closing the cover becomes smoother. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of the first use state of the actuating cylinder of the utility model;

[0016] Figure 2 This is a schematic structural diagram of the second use state of the actuating cylinder of the utility model.

[0017] Markings in the figure: 1. Turntable body; 2. Cover; 3. First actuating cylinder; 4. First mounting seat; 5. Slide; 6. Second actuating cylinder; 7. Hinge point; 8. Second mounting seat; 9. Third mounting seat. DETAILED DESCRIPTION

[0018] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings.

[0019] like Figure 1 As shown, a turntable for an aerial work vehicle of this embodiment includes a turntable body 1 and a cover 2 installed on the turntable body 1, one end of the cover 2 is hinged on the turntable body 1, and the other end of the cover 2 is locked with the turntable body 1. A first cylinder 3 is installed on the turntable body 1, and the extended end of the first cylinder 3 is connected to the cover 2. A first mounting seat 4 is provided on the cover 2, and a slide groove 5 is provided on the first mounting seat 4. A second cylinder 6 is provided on the cover 2, and the extended end of the first cylinder 3 is hinged with the extended end of the second cylinder 6, and a hinge point 7 between the extended end of the first cylinder 3 and the extended end of the second cylinder 6 is located in the slide groove 5 and can move along the slide groove.

[0020] Specifically, the turntable body 1 is provided with a second mounting seat 8, and the fixed end of the first actuating cylinder 3 is hinged on the second mounting seat 8. The cover 2 is provided with a third mounting seat 9, and the fixed end of the second actuating cylinder 6 is hinged on the third mounting seat 9.

[0021] As a preferred embodiment of the utility model, the aerial work vehicle further includes a temperature sensor disposed in the turntable body 1, the temperature sensor is electrically connected to the control system, and the control system is electrically connected to the first actuating cylinder 3 and the second actuating cylinder 6. The program controls the movement of the first actuating cylinder 3 and the second actuating cylinder 6 to adjust the hinge point 7 as the temperature changes. Automatic adjustment of the hinge point of the actuating cylinder is achieved so that the cover will not be difficult to open or close due to temperature changes.

[0022] The working principle of the aerial work vehicle of this embodiment is as follows:

[0023] When the temperature rises, the force of the second cylinder 6 becomes larger, and when the force is greater than the force of the first cylinder 3 along the direction of the slide 5, the hinge point 7 is pushed to the upper part of the slide 5. Figure 1 As shown, at this time, the force arm of the first actuating cylinder 3 acting on the cover 2 becomes smaller, making closing the cover 2 more labor-saving.

[0024] When the temperature drops, the force of the second cylinder 6 becomes smaller, and when the force is smaller than the force of the first cylinder 3 along the direction of the slide 5, the hinge point 7 is pushed to the lower part of the slide 5. Figure 2 As shown, at this time, the force arm of the first actuating cylinder 3 acting on the cover 2 becomes larger, making it easier to open the cover 2.

[0025] Assuming that the thrust of the actuator is 900N, and the thrust of the actuator is affected by temperature by ±10%, it can be assumed that when the temperature is high, the thrust of the actuator is 990N, and when the temperature is low, the thrust of the actuator is 810N.

[0026] During the design, the two cylinders are of different specifications, and the second cylinder 6 is customized. By reducing the cross-sectional area of ​​the second cylinder 6 and using a gas that is more susceptible to thermal expansion, the impact of the change in thrust due to temperature change on the second cylinder 6 is more significant.

[0027] When the temperature rises, the thrust of the second actuating cylinder 6 increases significantly, and the thrust exceeds the component force of the first actuating cylinder 3 , and the hinge point 7 moves to the upper part of the slide groove 5 .

[0028] When the temperature decreases, the thrust of the second actuating cylinder 6 is significantly reduced, and the thrust is smaller than the component force of the first actuating cylinder 3 . At this time, the hinge point 7 moves to the lower part of the slide groove 5 .

[0029] Regarding the torque difference between this embodiment and the existing structure:

[0030] The structure currently used is a single gas spring. When the temperature is high, the gas spring torque is 223.74N*m. When the temperature is low, the gas spring torque is 183.06N*m. It can be seen that when the temperature changes, the gas spring torque changes greatly.

[0031] In this embodiment, when the temperature is high, the hinge point 7 moves to the upper part of the slide groove 5, the thrust of the first actuator cylinder 3 is 990N, and the distance between the first actuator cylinder 3 and the opening and closing hinge of the cover is 0.195m. At this time, the torque of the first actuator cylinder 3 is calculated to be 193.05N*m.

[0032] When the temperature is low, the hinge point 7 moves to the lower part of the slide groove 5, the thrust of the first actuator cylinder 3 is 810N, and the distance between the first actuator cylinder 3 and the opening and closing hinge of the cover is 0.238m. At this time, the torque of the first actuator cylinder 3 is calculated to be 192.78N*m.

[0033] It can be seen from this that in this embodiment, by adjusting the position of the hinge point, the torque of the gas spring can be kept in a constant state.

[0034] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A turntable for an aerial work vehicle, comprising a turntable body (1) and a cover (2) mounted on the turntable body (1), wherein a first actuating cylinder (3) is mounted on the turntable body (1), and an extended end of the first actuating cylinder (3) is connected to the cover (2); characterized in that: The cover member (2) is provided with a first mounting seat (4), the first mounting seat (4) is provided with a slide groove (5), the cover member (2) is provided with a second actuating cylinder (6), the extended end of the first actuating cylinder (3) is hinged to the extended end of the second actuating cylinder (6), and the hinge point (7) between the first actuating cylinder (3) and the second actuating cylinder (6) is located in the slide groove (5) and can move along the slide groove (5).

2. The aerial work vehicle turntable according to claim 1, characterized in that: The turntable body (1) is provided with a second mounting seat (8), and the fixed end of the first actuating cylinder (3) is hinged on the second mounting seat (8).

3. The aerial work vehicle turntable according to claim 1, characterized in that: A third mounting seat (9) is provided on the cover member (2), and the fixed end of the second actuating cylinder (6) is hinged on the third mounting seat (9).

4. The aerial work vehicle turntable according to claim 1, characterized in that: One end of the cover (2) is hinged on the turntable body (1), and the other end of the cover (2) is locked with the turntable body (1).

5. The aerial work vehicle turntable according to any one of claims 1 to 4, characterized in that: It also includes a temperature sensor, which is electrically connected to a control system, and the control system is electrically connected to the first actuating cylinder (3) and the second actuating cylinder (6).

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