Handrail box turnover mechanism

Abstract

The utility model discloses an armrest box turnover mechanism. The armrest box turnover mechanism comprises a base, a box body is hinged to the base through a first rotating shaft, an air spring is arranged between the box body and the base and drives the box body to rotate around the first rotating shaft, a second rotating shaft is arranged on the side, away from the first rotating shaft, of the box body, the outer side of the second rotating shaft is sleeved with a limiting plate, and a sliding groove is formed in the limiting plate and is in an S shape. The base is fixedly connected with a stop pin inserted into the sliding groove, the stop pin is clamped into one end of the sliding groove to maintain the box body in a working state, and the stop pin is clamped into the other end of the sliding groove to maintain the box body in a non-working state. According to the utility model, the problems of unreliable limiting and certain potential safety hazards in a non-working state in the prior art are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of armrest boxes, in particular to a flipping mechanism for an armrest box. Background Art

[0002] Due to the small entrance of the cab of construction machinery, in order to facilitate the driver's passage, an armrest box with a flipping function is generally adopted at present. For example, the Chinese utility model patent with the publication number CN215883416U and the name "Armrest Box Structure and Construction Machinery" discloses that "a tension spring 16 is arranged at one end of the pull rod 4 far from the handle on the pull rod 4, and the tension spring 16 is connected with the side frame. The pulling force generated by the tension spring 16 keeps the pull rod 4 in the state shown in Figure 5 always when the armrest box is in the non-working state", however, the pulling force provided by the tension spring in this state is not reliable. The driver can inadvertently overcome the pulling force of the tension spring through the side frame (or other parts of the armrest box), forcing the armrest box to rotate and enter the working state when the driver is not ready, which poses a certain safety hazard. Summary of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the purpose of the present utility model is to provide an armrest box flipping mechanism with reliable limiting and capable of eliminating safety hazards.

[0004] To achieve the above purpose, the technical solution adopted by the armrest box flipping mechanism of the present utility model is:

[0005] An armrest box flipping mechanism includes a base. The base is hinged with a box body through a first rotating shaft. An air spring is arranged between the box body and the base, and the air spring drives the box body to rotate around the first rotating shaft. A second rotating shaft is arranged on the side of the box body far from the first rotating shaft. A limiting plate is sleeved outside the second rotating shaft. The limiting plate is provided with a chute, and the chute is S-shaped. A retaining pin inserted into the chute is fixedly connected to the base. One end of the retaining pin inserted into the chute maintains the box body in the working state, and the other end of the retaining pin inserted into the chute maintains the box body in the non-working state.

[0006] Preferably, a torsion spring for squeezing the limiting plate is arranged between the limiting plate and the base.

[0007] Preferably, a rolling bearing is sleeved outside the retaining pin.

[0008] Preferably, a pull rod is fixedly connected to the second rotating shaft through a connecting plate.

[0009] Preferably, a travel switch cooperating with the box body is arranged on the base.

[0010] Preferably, a falling-back limiting block in soft contact with the bottom of the box body is arranged on the base.

[0011] Compared with the prior art, the present utility model has the following advantages:

[0012] 1. One end of the retaining pin is inserted into the sliding groove to keep the box body in the working state, and the other end of the retaining pin inserted into the sliding groove keeps the box body in the non - working state. The limit is reliable. When the box body switches between the working state and the non - working state, it must be unlocked by rotating the second rotating shaft, avoiding misoperation by the driver and eliminating potential safety hazards.

[0013] 2. The torsion spring always exerts a squeezing force on the limiting plate to ensure the clamping state of the retaining pin at both ends of the sliding groove, further improving the limiting reliability of the limiting plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the left - hand view of the non - working state of the armrest box flipping mechanism of the present utility model.

[0015] Figure 2 It is the right - hand view of the non - working state of the armrest box flipping mechanism of the present utility model.

[0016] Figure 3 It is the left - hand view of the working state of the armrest box flipping mechanism of the present utility model.

[0017] Figure 4 It is the right - hand view of the working state of the armrest box flipping mechanism of the present utility model.

[0018] Figure 5 It is the installation schematic diagram of the gas spring.

[0019] Figure 6 It is the installation schematic diagram of the pull rod.

[0020] Figure 7 It is the structural schematic diagram of the limiting plate.

[0021] Among them, 1 is the base, 11 is the falling - back limit block, 12 is the travel switch, 13 is the retaining pin, 14 is the rolling bearing, 15 is the first hanging pin, 2 is the first rotating shaft, 3 is the box body, 4 is the gas spring, 5 is the second rotating shaft, 51 is the connecting plate, 52 is the pull rod, 6 is the limiting plate, 61 is the sliding groove, 62 is the second hanging pin, 7 is the torsion spring. SPECIFIC EMBODIMENTS

[0022] The present utility model will be further clarified below in conjunction with the drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model. After reading the present utility model, various equivalent forms of modification by those skilled in the art fall within the scope defined by the appended claims of this application.

[0023] Such as Figures 1-7As shown, a flipping mechanism of an armrest box comprises a base 1, the rear side of the base is hinged to a box body 3 through a first rotating shaft 2, a gas spring 4 is arranged between the box body and the base, the cylinder of the gas spring is hinged to the front side of the bottom of the box body, the telescopic rod of the gas spring is hinged to the rear side of the base, the gas spring drives the box body to rotate around the first rotating shaft, a return limit block 11 in soft contact with the bottom of the box body is installed on the front side of the base, the return limit block limits the return angle of the box body, the base is located between the first rotating shaft and the return limit block, and a travel switch 12 cooperating with the box body is installed. After the box body flips upward, the travel switch is disconnected and triggered, and the pilot oil circuit of the pilot hydraulic system is cut off. After the box body flips downward and resets, the travel switch is turned on and triggered, and the pilot oil circuit of the pilot hydraulic system is turned on, so that the pilot control operation of the machine can be performed. The travel switch improves the safety of engineering machinery operation, and the box body is away from the first rotating shaft. A second rotating shaft 5 is installed on one side of a rotating shaft, and the middle part of the second rotating shaft is fixedly connected to the pull rod 52 through the connecting plate 51 to facilitate the rotation of the second rotating shaft. The outer side of the second rotating shaft is sleeved with a limit plate 6, and the limit plate is located on the outer side of the base. The limit plate has a slide groove 61, and the slide groove is S-shaped. The base is fixed with a stop pin 13 inserted into the slide groove, and the outer side of the stop pin is sleeved with a rolling bearing 14 to facilitate relative sliding between the stop pin and the limit plate. The stop pin is inserted into the front end of the slide groove to maintain the box in a working state, and the stop pin is inserted into the rear end of the slide groove to maintain the box in a non-working state. A first hanging pin 15 is installed on the outer wall of the rear side of the base, and a second hanging pin 62 is installed on the rear side of the limit plate. A torsion spring 7 for squeezing the limit plate is installed between the first and second hanging pins. The torsion spring always applies a squeezing force to the limit plate to ensure that the stop pin is clamped at both ends of the slide groove, further improving the limiting reliability of the limit plate.

[0024] The specific working process and working principle of the utility model are as follows: when the working state is converted to the non-working state, the pull rod is lifted, the second rotating shaft drives the limit plate to rotate, the stop pin is completely exposed and fails at the front end of the slide slot, the telescopic rod of the gas spring extends, and drives the box body to rotate around the first rotating shaft. At the same time, as the limit plate rotates, the stop pin slides to the rear end of the slide slot relative to the limit plate, and the torsion spring increases the clamping state of the stop pin and the rear end of the slide slot, keeping the box body in the flip-up state. At this time, the travel switch is disconnected and triggered, the pilot oil circuit of the pilot hydraulic system is cut off, and the engineering vehicle It cannot work to ensure safety; when the non-working state is converted to the working state, the pull rod is pressed down, and the second shaft drives the limit plate to rotate in the opposite direction. The stop pin is completely exposed and fails at the rear end of the slide. The telescopic rod of the gas spring is compressed and retracted, and the box falls back. At the same time, as the limit plate rotates, the stop pin slides to the front end of the slide relative to the limit plate. At this time, the bottom of the box contacts the travel switch and the fall-back limit block, and the torsion spring increases the clamping state between the stop pin and the front end of the slide, keeping the box in the fall-back state. At this time, the travel switch is turned on and triggered, and the machine enters the working state. The utility model opens an S-shaped slide on the limit plate and cooperates with the stop pin to keep the box in the working state or the non-working state. The rigid limit is more reliable, and it must be unlocked by rotating the second shaft, avoiding the driver's misoperation, thereby eliminating safety hazards.

Claims

1. A flip mechanism for an armrest box, characterized in that: It includes a base. The base is hinged with a box body through a first rotating shaft. An air spring is arranged between the box body and the base. The air spring drives the box body to rotate around the first rotating shaft. A second rotating shaft is arranged on the side of the box body away from the first rotating shaft. A limiting plate is sleeved outside the second rotating shaft. The limiting plate is provided with a chute, and the chute is S-shaped. A stop pin inserted into the chute is fixedly connected to the base. One end of the stop pin inserted into the chute maintains the box body in the working state, and the other end of the stop pin inserted into the chute maintains the box body in the non-working state.

2. The armrest box flipping mechanism according to claim 1, characterized in that: A torsion spring for pushing the limiting plate is arranged between the limiting plate and the base.

3. The armrest box flipping mechanism according to claim 1, characterized in that: A rolling bearing is sleeved outside the stop pin.

4. The armrest box flipping mechanism according to claim 1, characterized in that: A pull rod is fixedly connected to the second rotating shaft through a connecting plate.

5. The armrest box flipping mechanism according to claim 1, characterized in that: The base is provided with a travel switch that cooperates with the box body.

6. The armrest box flipping mechanism according to claim 1, characterized in that: The base is provided with a falling limit block that is in soft contact with the bottom of the box body.

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