Elevator with safety lock unlocking device

Abstract

The utility model relates to the technical field of lifters, and discloses a lifter with a safety lock unlocking device, which comprises a base, two groups of first lifting rods and second lifting rods which are mutually symmetrical are crosswise arranged at the upper end of the base, a lifting platform is arranged at the upper ends of the second lifting rods, the unlocking device is arranged at the lower ends of the first lifting rods, and the safety lock unlocking device is arranged at the lower ends of the second lifting rods. The unlocking device comprises a stop plate arranged at the lower end of the first lifting rod. The air cylinder is started, the height of the lifting platform is gradually increased, after the lifting platform rises to a certain height, the extending end of the air cylinder is stopped from extending, at the moment, the stop plate is clamped between the two sets of clamping teeth, and if the air cylinder suddenly breaks down in the using process, the stop plate abuts against the vertical face of one side of the clamping teeth at the moment; at the moment, the stop plate is clamped between the two sets of clamping teeth and cannot move, so that the height of the lifting platform cannot be reduced, and the problems that the air cylinder suddenly breaks down in the using process, the lifting platform suddenly falls, and consequently goods are damaged and casualties are caused are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of lift especially relates to a lift with safety lock unlocking device. BACKGROUND

[0002] The lift is also called lifting operation platform, which is a kind of multifunctional lifting mechanical equipment, and can be divided into fixed type and mobile type, guide rail type, curved arm type, scissor type, chain type, loading and unloading platform and the like, the scissor type lift is a special equipment for high-altitude operation with wide application, the scissor type mechanical structure makes the lifting platform have high stability after lifting, the wide operation platform and high carrying capacity make the high-altitude operation range larger, and multiple people can operate simultaneously, which makes the high-altitude operation more efficient and safer, and is a lifting equipment for high-altitude operation with wide application, suitable for factory, workshop, workshop, repair and outdoor operation such as shipyard.

[0003] The existing lift is often driven to lift by a cylinder, and if the hydraulic system suddenly fails or the cylinder leaks during lifting, the lifting platform may suddenly fall due to loss of support, which not only causes damage to goods, but also may cause serious personnel casualties. CONTENT OF THE UTILITY MODEL

[0004] In view of the problem that the existing lift is often driven to lift by a cylinder, and if the hydraulic system suddenly fails or the cylinder leaks during lifting, the lifting platform may suddenly fall due to loss of support, which not only causes damage to goods, but also may cause serious personnel casualties, the utility model is provided.

[0005] To solve the above technical problems, the utility model provides the following technical scheme: a lift with safety lock unlocking device, including base, the base upper end is equipped with two groups of first lifting rod and second lifting rod which are symmetrical to each other, the second lifting rod upper end is equipped with lifting platform, the first lifting rod lower end is equipped with unlocking device, the unlocking device includes the stop plate in the first lifting rod lower end, the stop plate upper end face front side is equipped with mounting plate, the mounting plate middle end is inserted with unlocking block, the unlocking block middle end is equipped with the receiving groove, the unlocking block lower end is equipped with limit protrusion, the mounting plate middle end is inserted with the bolt, the base upper end one side is located in the first lifting rod lower end and is equipped with multiple groups of clamping tooth matched with the stop plate.

[0006] As a preferred scheme of the lift with safety lock unlocking device, wherein: the first lifting rod and the second lifting rod middle end are cross rotary connected, the first lifting rod upper end and lower end are respectively hinged with the lifting platform lower end face and the stop plate upper end two sides, the lifting platform lower end is fixedly provided with a sliding rod, the sliding rod outer wall is sleeved with a sliding sleeve, the second lifting rod upper end and lower end are respectively hinged with the sliding sleeve lower end and the base upper end.

[0007] As a preferred scheme of the elevator with the safety lock unlocking device, two groups of the second lifting rods are fixedly provided with a first fixed plate between lower ends, two groups of the first lifting rods are fixedly provided with a second fixed plate between upper ends, the lower end of the air cylinder is hinged to the first fixed plate, and the extended end of the air cylinder is hinged to the second fixed plate.

[0008] As a preferred scheme of the elevator with the safety lock unlocking device, the lower end of the stop plate is inserted between the two groups of clamping teeth, one side of the clamping teeth is provided in an arc shape, and the other side is provided in a vertical plane shape.

[0009] As a preferred scheme of the elevator with the safety lock unlocking device, the unlocking block is movably inserted into the middle end of the mounting plate, the latch is movably inserted through the mounting plate and the unlocking block, and the mounting plate and the unlocking block are both provided with a hole matched with the latch.

[0010] As a preferred scheme of the elevator with the safety lock unlocking device, the lower end of the stop plate is movably inserted into the middle of the receiving groove, and the lower end of the limiting protrusion is attached to the upper end of the base.

[0011] As a preferred scheme of the elevator with the safety lock unlocking device, when the unlocking block is movably sleeved on the upper end of the horizontally placed latch and is in a natural drooping state, the center of gravity of the limiting protrusion deviates to the left of the center of gravity of the latch, and the center of gravity of the latch and the center of gravity of the lower end of the limiting protrusion are not on the same vertical line.

[0012] Compared with the prior art, the utility model has at least the following beneficial effects:

[0013] 1、the utility model discloses, starts the air cylinder, and the height of the lifting platform gradually rises, and after rising to a certain height, the extension of the extension end of the air cylinder is stopped, and the stop plate is clamped between the two groups of clamping teeth at this time, if the air cylinder suddenly fails in the use process, the vertical surface of the stop plate and the clamping tooth one side is abutted at this time, the stop plate is clamped between the two groups of clamping teeth and cannot move at this time, so that the height of the lifting platform does not drop, so that the problem that the goods are damaged and personnel casualties are caused by the sudden drop of the lifting platform in the use process of the air cylinder is avoided.

[0014] 2. The utility model discloses, when the height of the lifting platform needs to be lowered, the unlocking block is inserted into the middle end of the mounting plate, the bolt is respectively inserted through the perforation of the mounting plate and the unlocking block, then the cylinder is started to contract, the limiting protrusion and the unlocking block rotate and move the angle of direction to the direction of the stop plate, the lower end of the stop plate is inserted into the receiving groove, the receiving groove gradually lifts the stop plate, the stop plate rotates a certain angle upwards along the lower end of the first lifting rod, so that the lower end of the stop plate moves out from between the two sets of clamping teeth, and the locking of the stop plate can be released, and the height of the lifting platform gradually decreases. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the whole three-dimensional structure schematic diagram of the elevator with the safety lock unlocking device of the utility model;

[0016] Figure 2 It is the whole three-dimensional structure schematic diagram of the elevator with the safety lock unlocking device of the utility model;

[0017] Figure 3 It is the unlocking device three-dimensional structure schematic diagram of the elevator with the safety lock unlocking device of the utility model;

[0018] Figure 4 It is the unlocking block and bolt three-dimensional structure schematic diagram of the elevator with the safety lock unlocking device of the utility model;

[0019] Figure 5 It is the unlocking block plane structure schematic diagram of the elevator with the safety lock unlocking device of the utility model;

[0020] Figure 6 It is the stop plate and clamping tooth three-dimensional structure schematic diagram of the elevator with the safety lock unlocking device of the utility model.

[0021] BRIEF DESCRIPTION OF DRAWINGS

[0022] 1, base, 2, first lifting rod, 3, second lifting rod, 4, lifting platform, 5, sliding rod, 6, sliding sleeve, 7, unlocking device, 71, stop plate, 72, mounting plate, 73, unlocking block, 74, bolt, 75, receiving groove, 76, limiting protrusion, 8, clamping tooth, 9, first fixed plate, 10, second fixed plate, 11, cylinder. DETAILED DESCRIPTION

[0023] In order to make the above purpose, features and advantages of the utility model more obvious and easy to understand, the specific embodiment of the utility model is explained in detail below with the drawings of the specification.

[0024] Example 1

[0025] Reference Figures 1-6The utility model provides a lift with safety lock unlocking device, this lift with safety lock unlocking device includes base 1, the upper end of base 1 is equipped with two groups of first lifting rod 2 and second lifting rod 3 that are mutually symmetrical, the upper end of second lifting rod 3 is equipped with lifting platform 4, the lower end of first lifting rod 2 is equipped with unlocking device 7, and unlocking device 7 includes the stop plate 71 of being equipped at the lower end of first lifting rod 2, the front side of the upper end surface of stop plate 71 is equipped with mounting plate 72, the middle end of mounting plate 72 is inserted with unlocking block 73, the middle end of unlocking block 73 is equipped with the receiving groove 75 of being seted up, the lower end of unlocking block 73 is equipped with the limit protrusion 76, the middle end of mounting plate 72 is inserted with the bolt 74, and the lower end of first lifting rod 2 is evenly equipped with multiple groups of the clamping tooth 8 that cooperate with stop plate 71 on one side of the upper end of base 1.

[0026] The middle end of first lifting rod 2 and second lifting rod 3 is crossed rotationally connected, and the upper end and the lower end of first lifting rod 2 are respectively hinged with the lower end surface of lifting platform 4 and the both sides of the upper end of stop plate 71, and the lower end of lifting platform 4 is fixedly equipped with slide rod 5, and the outer wall of slide rod 5 is sleeved with slide sleeve 6, and the upper end and the lower end of second lifting rod 3 are respectively hinged with the lower end of slide sleeve 6 and the upper end of base 1.

[0027] The lower end between the two groups of second lifting rod 3 is fixedly equipped with first fixed plate 9, and the upper end between the two groups of first lifting rod 2 is fixedly equipped with second fixed plate 10, and the lower end of cylinder 11 is hinged with first fixed plate 9, and the extension end of cylinder 11 is hinged with second fixed plate 10.

[0028] The both sides of the lower end of stop plate 71 are inserted between the two groups of clamping tooth 8, and one side of clamping tooth 8 is set as arc shape, and one side is set as plane vertical shape.

[0029] Unlocking block 73 is movably inserted in the middle end of mounting plate 72, and the bolt 74 is movably inserted through mounting plate 72 and unlocking block 73, and mounting plate 72 and unlocking block 73 are both provided with the insertion hole matched with bolt 74.

[0030] The middle part of the lower end of stop plate 71 is movably inserted in receiving groove 75, and the lower end of limit protrusion 76 is attached to the upper end of base 1.

[0031] When unlocking block 73 is movably sleeved on the upper end of horizontally placed bolt 74 and is in natural drooping state, the center of gravity of limit protrusion 76 deviates from the direction of the center of gravity of bolt 74 at this time, and the center of gravity of bolt 74 and the center of gravity of the lower end of limit protrusion 76 are not on the same vertical line.

[0032] When the lifting platform 4 needs to be raised, the pin 74 is pulled out of the unlocking block 73 and the mounting plate 72, the unlocking block 73 is disassembled from the mounting plate 72, and the extension end of the air cylinder 11 is extended, under the thrust of the air cylinder 11, the first lifting rod 2 rotates upward by a certain angle, the lower end of the first lifting rod 2 drives the stop plate 71 to slide along the tooth 8, in this process, the second lifting rod 3 drives the sliding sleeve 6 to slide along the outer wall of the sliding rod 5, and the height of the lifting platform 4 gradually rises, after rising to a certain height, the extension end of the air cylinder 11 is stopped from extending, at this time, the stop plate 71 is clamped between the two sets of teeth 8, one side of the tooth 8 is arranged in an arc shape, and the other side is arranged in a vertical plane, if the air cylinder 11 suddenly fails during use, at this time, the stop plate 71 and the vertical plane of one side of the tooth 8 abut, at this time, the stop plate 71 is clamped between the two sets of teeth 8 and cannot move, so that the height of the lifting platform 4 cannot be lowered, thereby avoiding the problem that the goods are damaged and the personnel are injured due to the sudden falling of the lifting platform 4.

[0033] When the height of the lifting platform 4 needs to be lowered, the unlocking block 73 is inserted into the mounting plate 72, the pin 74 is inserted through the perforations of the mounting plate 72 and the unlocking block 73, then the air cylinder 11 is retracted, the lower end of the limiting protrusion 76 is subjected to the friction force of the upper end surface of the base 1, the limiting protrusion 76 and the unlocking block 73 rotate and move by an angle towards the stop plate 71, the lower end of the stop plate 71 is inserted into the receiving groove 75, the receiving groove 75 gradually lifts the stop plate 71, the stop plate 71 rotates upward by a certain angle along the lower end of the first lifting rod 2, so that the lower end of the stop plate 71 moves out of the two sets of teeth 8, that is, the locking of the stop plate 71 is released, at this time, the air cylinder 11 gradually retracts, the stop plate 71 gradually slides along the tooth 8, and the height of the lifting platform 4 gradually decreases, when the lifting platform 4 is lowered to a certain height, the pin 74 is pulled out, the unlocking block 73 is disassembled from the mounting plate 72, the lower end of the stop plate 71 is clamped between the two sets of teeth 8, the stop plate 71 cannot continue to move, and the height of the lifting platform 4 cannot continue to decrease at this time, and the height of the lifting platform 4 is locked.

[0034] The remaining structure is the same as that of example 1

[0035] It should be noted that the above examples are only used to illustrate the technical solutions of the present application and are not limiting, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. An elevator with a safety lock unlocking device, comprising a base (1), characterized in that: The base (1) upper end is provided with two groups of first lifting rods (2) and second lifting rods (3) which are symmetrical to each other, the upper end of the second lifting rod (3) is provided with a lifting platform (4), the lower end of the first lifting rod (2) is provided with an unlocking device (7), the unlocking device (7) comprises a stop plate (71) arranged at the lower end of the first lifting rod (2), the front side of the upper end surface of the stop plate (71) is provided with a mounting plate (72), the middle end of the mounting plate (72) is inserted with an unlocking block (73), the middle end of the unlocking block (73) is provided with a receiving groove (75), the lower end of the unlocking block (73) is provided with a limiting protrusion (76), the middle end of the mounting plate (72) is inserted with a latch (74), and the lower end of the base (1) is uniformly provided with a plurality of clamping teeth (8) matched with the stop plate (71).

2. The elevator with a safety lock unlocking device according to claim 1, characterized in that: The first lifting rod (2) and the second lifting rod (3) are cross-rotatingly connected, the upper end and the lower end of the first lifting rod (2) are respectively hinged to the lower end surface of the lifting platform (4) and the upper end of the stop plate (71), the lower end of the lifting platform (4) is fixedly provided with a sliding rod (5), the outer wall of the sliding rod (5) is sleeved with a sliding sleeve (6), and the upper end and the lower end of the second lifting rod (3) are respectively hinged to the lower end of the sliding sleeve (6) and the upper end of the base (1).

3. The elevator with a safety lock unlocking device according to claim 1, characterized in that: The lower ends of the two groups of second lifting rods (3) are fixedly provided with a first fixed plate (9), the upper ends of the two groups of first lifting rods (2) are fixedly provided with a second fixed plate (10), the upper end of the first fixed plate (9) is provided with a gas cylinder (11), the lower end of the gas cylinder (11) is hinged to the first fixed plate (9), and the extension end of the gas cylinder (11) is hinged to the second fixed plate (10).

4. The elevator with a safety lock unlocking device according to claim 1, characterized in that: The lower end of the stop plate (71) is inserted between the two groups of clamping teeth (8).

5. The elevator with a safety lock unlocking device according to claim 1, characterized in that: The unlocking block (73) is movably inserted in the middle end of the mounting plate (72), and the latch (74) is movably inserted through the mounting plate (72) and the unlocking block (73).

6. The elevator with a safety lock unlocking device according to claim 1, characterized in that: The mounting plate (72) and the unlocking block (73) are both provided with a hole matched with the latch (74).

7. The elevator with a safety lock unlocking device according to claim 1, characterized in that: The lower end of the stop plate (71) is movably inserted in the receiving groove (75), and the lower end of the limiting protrusion (76) is attached to the upper end of the base (1). When the unlocking block (73) is movably sleeved on the upper end of the horizontally placed latch (74) and is in a natural drooping state, the center of gravity of the limiting protrusion (76) deviates from the center of gravity of the latch (74) in the left direction, and the center of gravity of the latch (74) and the center of gravity of the lower end of the limiting protrusion (76) are not on the same vertical line.

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