Electric safety door of cab

Abstract

The utility model relates to a cab electric safety door which comprises a door body, an opening matched with the door body is formed in a side plate of a cab, a gear is rotationally connected to the portion, located on the top of the opening, of the cab, a rack meshed with the gear is horizontally arranged on the inner side of the top of the side plate in a sliding mode, and a first connecting rod is hinged to the upper end of the middle of the door body. A second connecting rod and a third connecting rod which are arranged in parallel in a staggered mode are hinged to one side edge of the top of the door body, the free end of the second connecting rod is hinged to the inner side of the top of the opening, and the free end of the third connecting rod is hinged to the outer side of the top of the opening; by controlling the movement between the rack and the gear, the door body can be opened or embedded into the side plate opening of the cab in a horizontal state all the time, the side space required by opening is smaller than that of hinge type connection, getting off in a narrow environment is facilitated, and the door is suitable for industrial production and has very high practicability.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of cab door, especially relates to a cab electric safety door. BACKGROUND

[0002] In the prior art patent database, a patent with the name of a car door lock, application number CN201920092081.0, and application date 2019-01-21, is disclosed. The car door lock comprises a lock catch ring and a lock body structure. The lock body structure comprises a pair of cross-hinged connecting rods in the door. Each connecting rod has a clamping block connected to the free end of the door. The free ends of the two clamping blocks abut against each other. Each connecting rod has a sliding rail connected to the other end. The sliding rail has a sliding block connected to it. A T-shaped bracket is arranged between the two connecting rods in the door. The horizontal rods of the T-shaped bracket are each hinged to a corresponding sliding block. The vertical rod of the T-shaped bracket is a rack. A first gear is connected to the rack. A second gear is arranged on the main shaft of the first gear. A manual gear is connected to the second gear. The manual gear comprises a connecting plate hinged to the door. The connecting plate has a sector gear connected to the second gear at one end. The other end of the connecting plate extends from the inner wall of the door and is connected to a hand turning part. Due to the cooperation of the rack and the two connecting rods, the horizontal movement of the rack controls the opening or closing of the two clamping blocks, thereby opening or closing the door.

[0003] In the prior art, most car doors are connected to the cab by hinges. When the door is fully opened, the door is perpendicular to the cab, which occupies a large space in the width direction of the vehicle. When the side space is small, it is impossible to get off the vehicle. Therefore, the present application aims to provide a cab electric safety door, which is parallel to the side of the cab when the door is fully opened, occupies a small space, and is convenient for getting off the vehicle. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem that in the prior art, most car doors are connected to the cab by hinges. When the door is fully opened, the door is perpendicular to the cab, which occupies a large space in the width direction of the vehicle. When the side space is small, it is impossible to get off the vehicle. In order to improve the shortcomings, the utility model provides a cab electric safety door.

[0005] To achieve the above-mentioned purpose, the utility model is realized by the following technical scheme:

[0006] The utility model provides a cab electric safety door, including the door body, the opening of the side plate of cab is equipped with the door body cooperation, the gear wheel is connected on the top of opening rotates, the rack is slidably arranged in the inside of top of side plate and is engaged with gear wheel, the first connecting rod is hinged on the upper end of door body middle part, the other end of first connecting rod is fixed with the neck of gear wheel and rotates synchronously, the second connecting rod and third connecting rod are hinged on the side of top of door body respectively and are arranged in parallel and are misaligned, the free end of second connecting rod is hinged with the inside of top of opening, the free end of third connecting rod is hinged with the outside of top of opening, the first connecting rod, second connecting rod and third connecting rod form parallel four connecting rod mechanism.

[0007] Compared with the prior art, the utility model has the advantages that: due to the cooperation of three connecting rods and the door body, by controlling the movement between the rack and the gear, the door body can always be kept in a horizontal state when opening or embedding into the opening of the side plate of the cab, and the required side space for opening the door is smaller than the hinge connection mode, which is convenient for getting off in a narrow environment and is suitable for industrial production, and has strong practicability.

[0008] As a preferred scheme, the first connecting rod is a bent rod, which comprises a connecting segment fixed with the neck of the gear, and an inclined rod segment integrally arranged at the free end of the connecting segment.

[0009] As a preferred scheme, the second connecting rod and the third connecting rod have the same length.

[0010] As a preferred scheme, the inside of the side plate is provided with a guide block, and the rack is slidably arranged in the guide block.

[0011] As a preferred scheme, the inside of the side plate is provided with a mounting seat, the mounting seat is in an L shape, the horizontal segment of the mounting seat is fixed with the inside of the side plate, and an electro-hydraulic push rod is mounted on the vertical segment of the mounting seat, and the free end of the piston rod of the electro-hydraulic push rod is connected with the end face of the rack. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a structural schematic view of the utility model.

[0013] In the figure: 1 door body, 2 side plate, 3 opening, 4 gear, 5 rack, 6 first connecting rod, 601 connecting segment,

[0014] 602 inclined rod segment, 7 second connecting rod, 8 third connecting rod, 9 guide block, 10 mounting seat, 11 electro-hydraulic push rod. DETAILED DESCRIPTION

[0015] The technical scheme of the present application will be further described and explained in combination with the drawings and examples.

[0016] AsFigure 1 As shown, it is a cab electric safety door, including door body 1, the side plate 2 of cab is provided with the opening 3 matched with door body 1, the top of opening 3 is rotatably connected with gear 4, the inside of the top of side plate 2 is slidably provided with rack 5 engaged with gear 4, the upper end of the middle of door body 1 is hingedly connected with first connecting rod 6, the other end of first connecting rod 6 is fixedly connected with the neck of gear 4 and rotates synchronously with gear 4, the side of the top of door body 1 is hingedly connected with second connecting rod 7 and third connecting rod 8 which are arranged in parallel and staggered, the free end of second connecting rod 7 is hingedly connected with the inside of the top of opening 3, the free end of third connecting rod 8 is hingedly connected with the outside of the top of opening 3, first connecting rod 6, second connecting rod 7 and third connecting rod 8 form a parallelogram mechanism. First connecting rod 6 is a bent rod, which comprises a connecting section 601 fixedly connected with the neck of gear 4, and an inclined rod section 602 integrally arranged at the free end of the connecting section 601. Second connecting rod 7 and third connecting rod 8 have the same length. The inside of side plate 2 is provided with guide block 9, and rack 5 is slidably arranged in guide block 9. The inside of side plate 2 is provided with mounting seat 10, which is L-shaped, the horizontal section of mounting seat 10 is fixedly connected with the inside of side plate 2, and electro-hydraulic push rod 11 is installed on the vertical section of mounting seat 10, and the free end of the piston rod of electro-hydraulic push rod 11 is connected with the end surface of rack 5.

[0017] When working, the driver controls the working of electro-hydraulic push rod 11 through the function keys on the vehicle, when the piston rod of electro-hydraulic push rod 11 extends, it drives rack 5 to move horizontally to the left, due to the engagement of rack 5 and gear 4, gear 4 rotates counterclockwise, thereby driving first connecting rod 6 to swing counterclockwise, due to the parallelogram mechanism formed by first connecting rod 6, second connecting rod 7 and third connecting rod 8, second connecting rod 7 and third connecting rod 8 swing counterclockwise synchronously, door body 1 is opened and arranged horizontally and spaced from the outer surface of the side plate 2 of the cab; after the driver gets off the vehicle, the piston rod of electro-hydraulic push rod 11 in the vehicle is controlled to extend through the vehicle key, then door body 1 is always kept in a horizontal state and embedded into opening 3 to form a closed state, the lateral space required for opening the door is smaller compared with the hinged connection mode, which is convenient for getting off the vehicle in a narrow environment.

[0018] The utility model is not limited to the above embodiment, on the basis of the technical scheme disclosed in the utility model, the skilled in the art can make some substitutions and deformations to some technical features without creative labor according to the disclosed technical content, and these substitutions and deformations are all within the protection scope of the utility model.

Claims

1. A cab electrically powered safety door characterized by: The utility model provides a door body (1) is included, the side plate (2) of cab is equipped with the opening (3) with door body (1) cooperation, the gear (4) is rotationally connected on the cab of opening (3) top, the rack (5) of meshing connection with gear (4) is slidably arranged on the inside of side plate (2) top, the upper end of first connecting rod (6) is hinged in the middle of door body (1), the other end of first connecting rod (6) is fixed with the neck of gear (4) and rotates synchronously with gear (4), the side of top of door body (1) is hinged respectively with the second connecting rod (7) and third connecting rod (8) of parallel misplacement setting, the free end of second connecting rod (7) is hinged with the inside of opening (3) top, the free end of third connecting rod (8) is hinged with the outside of opening (3) top, first connecting rod (6), second connecting rod (7) and third connecting rod (8) form parallel four connecting rod mechanism.

2. A cab electrically powered safety door according to claim 1, characterised in that: The first connecting rod (6) is a bent rod, and the bent rod comprises a connecting section (601) fixed with the neck of the gear (4), and the free end of the connecting section (601) is integrally provided with a diagonal rod section (602).

3. A cab electrically powered safety door according to claim 2, characterised in that: The second connecting rod (7) and the third connecting rod (8) are consistent in length.

4. A cab electrically powered safety door according to claim 3, characterised in that: The inside of the side plate (2) is provided with a guide block (9), and the rack (5) is slidably inserted into the guide block (9).

5. A cab electrically operated safety door according to any one of claims 1 to 4, characterised in that: The inside of the side plate (2) is provided with a mounting seat (10), the mounting seat (10) is L-shaped, the horizontal section of the mounting seat (10) is fixed with the inside of the side plate (2), and the vertical section of the mounting seat (10) is provided with an electro-hydraulic push rod (11), and the free end of the piston rod of the electro-hydraulic push rod (11) is connected with the end surface of the rack (5).

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