Floor stopping protection mechanism for lifting platform

Abstract

The utility model discloses a layer stopping protection mechanism for a lifting platform, which comprises an electric push rod, the left end of the electric push rod is provided with a convex block, the convex block is provided with a threaded hole, the left end of the electric push rod is connected with a locking pin shaft, the right end of the locking pin shaft is provided with a concave block, the concave block is provided with a threaded hole, and the threaded hole is connected with the electric push rod. The locking pin shaft is sleeved with a pin shaft sleeve, the locking pin shaft can freely stretch out and draw back in the pin shaft sleeve, a layer stopping check block is arranged at the left end of the pin shaft sleeve, and when the locking pin shaft stretches out of the pin shaft sleeve, the bottom of the locking pin shaft is attached to the top of the layer stopping check block. The lifting platform can effectively solve the problem of flat layer height difference generated by an existing lifting mode, and the due safety protection effect is achieved when the lifting platform stops at a landing. And potential safety hazards in the prior art are eliminated.

Description

Technical Field

[0001] The utility model belongs to the technical field of hoisting machines, and particularly relates to a floor stopping protection mechanism for a lifting platform. Background Art

[0002] The lifting platform integrates machinery and electricity and is a mechanical equipment widely used in industries such as metallurgy and chemical industry. It is mainly used for material lifting in multi-storey factories and workshops.

[0003] Existing lifting platforms generally adopt two methods: hydraulic lifting or driving motor lifting. However, both of these methods have some deficiencies. 1. For the lifting operation platform using the hydraulic method, due to the compression elasticity and high-temperature thermal expansion performance of the hydraulic oil, a large height difference is generated when the platform stops, and the height difference changes with the weight of the goods and the temperature of the hydraulic oil. 2. The lifting operation platform using the driving motor to lift generally uses the motor to drive the chain to lift. Although it avoids the compression elasticity and thermal expansion elasticity of the hydraulic pressure, the chain of the motor itself has stretching elasticity. The above two lifting methods will inevitably generate a flat layer height difference, posing a safety hazard. Summary of the Utility Model

[0004] In order to solve the problem of flat layer height difference existing in the lifting platform during operation in the prior art, the inventor developed a floor stopping protection mechanism for a lifting platform based on the rich experience accumulated in the technical field of hoisting machines.

[0005] In order to achieve the purpose of the utility model, the technical scheme adopted by the utility model is as follows: A floor stopping protection mechanism for a lifting platform, including an electric push rod, a convex block is arranged at the left end of the electric push rod, a threaded hole is opened on the convex block, a locking pin shaft is connected to the left end of the electric push rod, a concave block is opened at the right end of the locking pin shaft, a threaded hole is opened on the concave block, a pin shaft sleeve is sleeved on the locking pin shaft, the locking pin shaft can freely stretch in the pin shaft sleeve, a floor stopping block is arranged at the left end of the pin shaft sleeve, and when the locking pin shaft extends out of the pin shaft sleeve, the bottom of the locking pin shaft is attached to the top of the floor stopping block.

[0006] Further, the convex block is located inside the concave block, the outer wall of the convex block is closely attached to the inner wall of the concave block, the aperture sizes of the threaded holes of the convex block and the concave block are the same, and a fastening screw is installed in the threaded hole.

[0007] Further, the floor stopping block is welded to the guide rail H-beam or an externally added steel pipe.

[0008] Further, a gap for the locking pin shaft to freely stretch is formed between the outer wall of the locking pin shaft and the inner wall of the pin shaft sleeve.

[0009] Furthermore, the right end of the electric push rod is connected to a mounting base, and the mounting base is welded to the bottom of the lifting platform.

[0010] Furthermore, the telescopic stroke of the electric push rod is 50 mm, and the extension and retraction speed is 25 mm / s.

[0011] Further, each lifting platform is equipped with at least two stop-layer protection mechanisms, and the two stop-layer protection mechanisms are symmetrically installed. Each floor is equipped with matching stop-layer blocks.

[0012] The electric push rod in this application document is customized according to actual needs of the enterprise. The telescopic stroke of the electric push rod is 50mm, and the extension and retraction speed is 25mm / s. The upper and lower limit of the electric push rod is built-in, and no external travel switch or proximity switch is required. The push rod has 5 lead wires, see Figure 5 .

[0013] When the blue and brown wires are energized with +24V, the push rod extends. When it reaches the built-in upper limit of the push rod, the red and yellow wires feed back signals to the control system, and the circuit automatically cuts off the power and stops extending. When the blue and brown wires are energized with -24V, the push rod retracts. When it reaches the built-in lower limit of the push rod, the red and yellow wires feed back signals to the control system, and the circuit automatically cuts off the power and stops retracting.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the utility model can effectively solve the problem of level height difference caused by the existing lifting method by setting the stop layer block, pin shaft sleeve, locking pin shaft, fastening screws, electric push rod and other equipment. When the lifting platform rises, the electric push rod shrinks in the cavity. When it reaches the corresponding floor, the electric push rod is pushed out of the cavity, thereby driving the locking pin shaft to extend to the left. At this time, the bottom of the locking pin shaft fits together with the top of the stop layer block, so that the lifting platform plays a due safety protection role when it stops at the floor station. The safety hazards existing in the prior art are eliminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model when the lifting platform is docked at a landing station.

[0016] Figure 2 It is a structural schematic diagram of the utility model when the lifting platform is rising.

[0017] Figure 3 It is a structural schematic diagram of the utility model when the lifting platform is descending.

[0018] Figure 4 It is a schematic diagram of the exploded view of the electric push rod and the locking pin shaft.

[0019] Figure 5 This is a schematic diagram of the push rod lead wire.

[0020] Reference numerals: 1, stop block; 2, pin bushing; 3, locking pin; 302, concave block; 4, fastening screw; 5, electric push rod; 501, convex block; 6, mounting base. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] Refer to Figure 1 — Figure 5 As shown, a stop protection mechanism for a lifting platform includes an electric push rod 5. A convex block 501 is provided at the left end of the electric push rod 5. A threaded hole is provided in the convex block 501. The left end of the electric push rod 5 is connected to a locking pin 3. A concave block 301 is provided at the right end of the locking pin 3. A threaded hole is provided in the concave block 301. A pin bushing 2 is sleeved on the locking pin 301. The locking pin 301 can freely expand and contract within the pin bushing 2. A stop block 1 is provided at the left end of the pin bushing 3. When the locking pin 3 extends out of the pin bushing 2, the bottom of the locking pin 3 fits against the top of the stop block 1.

[0023] In this embodiment, the convex block 501 is located within the concave block 301. The outer wall of the convex block 501 is in close fit with the inner wall of the concave block 301. The pore diameters of the threaded holes of the convex block 501 and the concave block 301 are the same, and a fastening screw 4 is installed in the threaded hole.

[0024] In this embodiment, the stop block 1 is welded to the guide rail H-beam or an externally added steel pipe.

[0025] In this embodiment, a gap for the free expansion and contraction of the locking pin 3 is formed between the outer wall of the locking pin 3 and the inner wall of the pin bushing 2.

[0026] In this embodiment, the right end of the electric push rod 5 is connected to a mounting base 6, and the mounting base 6 is welded to the bottom of the lifting platform.

[0027] In this embodiment, the telescopic stroke of the electric push rod 5 is 50 mm, and the extension and retraction speed is 25 mm / s.

[0028] In this embodiment, at least two sets of stop protection mechanisms are installed on each lifting platform, and the two sets of stop protection mechanisms are symmetrically installed. A matching stop block 1 is installed on each floor.

[0029] Among them, the electric push rod 5 is customized by the enterprise according to actual needs. The telescopic stroke of the electric push rod 5 is 50 mm, and the extension and retraction speed is 25 mm / s. The upper and lower limits of the electric push rod are built-in, and there is no need to add a travel switch or proximity switch to replace them. The lead wire of this push rod is 5, as shown in Figure 5 . When the blue and brown wires are powered with +24V, the push rod extends. When it extends to the built-in upper limit of the push rod, the red and yellow wires will feedback the signal to the control system, and the circuit will automatically cut off the power and stop extending. When the blue and brown wires are powered with -24V, the push rod retracts. When it retracts to the built-in lower limit of the push rod, the red and yellow wires will feedback the signal to the control system, and the circuit will automatically cut off the power and stop retracting.

[0030] When the present utility model is specifically used, the on-site operator operates the lifting platform to move upward, referring to Figure 2 . When it runs to the corresponding floor, the positions of the electric push rod 5 and the locking pin shaft 3 should be slightly higher than the stop block 1 at the stop layer. At this time, the on-site personnel operate the button, and the electric push rod 5 extends, thereby driving the locking pin shaft 3 to move to the left. Then, the on-site personnel operate the lifting platform to move slowly downward. When the bottom of the locking pin shaft 3 fits with the top of the stop block 1 at the stop layer, the on-site personnel shut down the lifting platform, referring to Figure 1 . At this time, the stop block 1 at the stop layer can stably support the lifting platform, enabling the lifting platform to play its due safety protection role when docking at the landing station and eliminating the safety hazards existing in the prior art.

[0031] When the lifting platform moves downward, as Figure 3 shown, the on-site operator first slowly raises the lifting platform, and then operates the electric push rod 5 to contract to the right. Driven by the electric push rod 5, the locking pin shaft 3 also contracts to the right, and the locking pin shaft 3 leaves the stop block 1 at the stop layer. Then, operate the lifting platform to move slowly downward.

[0032] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A stop layer protection mechanism for a lifting platform, characterized in that: It includes an electric push rod. A convex block is provided at the left end of the electric push rod. A threaded hole is provided on the convex block. A locking pin shaft is connected to the left end of the electric push rod. A concave block is provided at the right end of the locking pin shaft. A threaded hole is provided on the concave block. A pin shaft sleeve is sleeved on the locking pin shaft. The locking pin shaft can freely extend and retract within the pin shaft sleeve. A stop block for stopping at a floor is provided at the left end of the pin shaft sleeve. When the locking pin shaft extends out of the pin shaft sleeve, the bottom of the locking pin shaft is in close contact with the top of the stop block for stopping at a floor.

2. The stopping layer protection mechanism for a lifting platform according to claim 1, characterized in that: The convex block is located within the concave block. The outer wall of the convex block is in close contact with the inner wall of the concave block. The aperture sizes of the threaded holes of the convex block and the concave block are the same, and a fastening screw is installed in the threaded hole.

3. The stopping layer protection mechanism for a lifting platform according to claim 1, characterized in that: The stop block for stopping at a floor is welded to the guide rail H-beam or an externally added steel pipe.

4. The stop layer protection mechanism for a lifting platform according to claim 1, characterized in that: A gap for the free extension and retraction of the locking pin shaft is formed between the outer wall of the locking pin shaft and the inner wall of the pin shaft sleeve.

5. The stop layer protection mechanism for a lifting platform according to claim 1, characterized in that: The right end of the electric push rod is connected to an installation base, and the installation base is welded to the bottom of the lifting platform.

6. The stopping layer protection mechanism for a lifting platform according to claim 1, wherein: The telescopic stroke of the electric push rod is 50 mm, and the extension and retraction speed is 25 mm / s.

7. The floor stop protection mechanism for a lifting platform according to claim 1, wherein: At least two sets of stop protection mechanisms are installed on each lifting platform, and the two sets of stop protection mechanisms are symmetrically installed.

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