Lifting platform car

Abstract

The utility model relates to the technical field of lifting platform cars, and particularly discloses a lifting platform car which comprises a car frame assembly, a lifting assembly and a monitoring assembly, the car frame assembly comprises a car frame and a driving platform arranged on the car frame in a lifting mode, and the driving platform is used for a driver to stand and operate. The lifting assembly comprises a lifting chain arranged on the frame in the vertical direction, the lower end of the chain is connected with the frame, the upper end of the chain is connected with the driving platform, the monitoring assembly comprises a contact switch and a contact block, and the contact block is fixed to the lower end of the lifting chain and used for limiting rising of the lower end of the lifting chain. The contact switch is fixed to the frame and located below the contact block, once the lifting chain is loosened, the contact block can move downwards, after the lifting chain descends to the preset height, the contact block can abut against the contact switch, then the contact switch sends out a signal to judge that the lifting chain is loosened, maintenance can be conducted in time, and the safety performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting vehicles, in particular to a lifting platform vehicle. Background Art

[0002] A lifting platform is mainly a platform used to drive the operator to lift and lower. Since it can change the horizontal height of the operator, it allows the operator to be closer to the operating position and his judgment is more accurate. Therefore, it is widely used in vehicles such as forklifts, rescue vehicles and construction vehicles.

[0003] In the prior art, lifting platforms generally include scissor-type lifting platforms and chain lifting platforms. The scissor-type lifting platform usually has a scissor-type lifting structure under the standing platform. However, since the scissor-type lifting structure occupies a large area, it can only be used on larger rescue vehicles and construction vehicles. The chain lifting platform refers to a standing platform driven by a lifting chain to perform lifting movements. Its lifting structure occupies a relatively small volume and is generally used on small vehicles such as forklifts. However, there is a more serious problem with the existing chain lifting platform. Once the chain is loose, it cannot be directly observed by the human eye. If the movement continues, there will be a risk of people falling. Summary of the invention

[0004] The utility model is made in consideration of the above-mentioned problems, and the purpose of the utility model is to provide a lifting platform vehicle, which can monitor in real time whether the lifting chain is loose, thereby improving the safety performance.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a lifting platform vehicle, comprising:

[0006] A vehicle frame assembly, comprising a vehicle frame and a driving platform that can be lifted and lowered on the vehicle frame;

[0007] A lifting assembly, comprising a lifting chain arranged on the frame in a vertical direction, wherein the lower end of the lifting chain is connected to the frame, and the upper end of the lifting chain is connected to the driving platform, and is used to drive the driving platform to perform lifting motion;

[0008] The monitoring component includes a contact switch and a contact block. The contact block is fixed to the lower end of the lifting chain and is used to limit the rise of the lower end of the lifting chain. The contact switch is fixed to the frame and is located below the contact block. When the contact block descends to a preset height, the contact block can be connected to the contact switch.

[0009] According to the above-mentioned lifting platform vehicle, a truncated cone-shaped abutment portion is provided at the lower part of the contact block, and the diameter of the upper part of the abutment portion is larger than the diameter of the lower part of the abutment portion. When the contact block descends to a preset height, the side of the abutment portion is in contact with the contact switch.

[0010] According to the above-mentioned lifting platform vehicle, a positioning plate extending outward is provided on one side of the bottom of the frame, the lower end of the lifting chain is set as a connecting end, the connecting end can pass through the positioning plate and be located below the positioning plate, the contact block is located on the connecting end and can abut against the bottom of the positioning plate.

[0011] According to the lifting platform vehicle described above, a threaded section is provided on the connection end, the contact block is movably sleeved on the connection end, a locking nut is provided on the threaded section, and the locking nut can abut against the bottom of the contact block.

[0012] According to the lifting platform vehicle described above, the monitoring component also includes an alarm, and the alarm is electrically connected to the contact switch.

[0013] According to the above-mentioned lifting platform vehicle, the frame assembly also includes a roof guard located on the top of the frame, and the roof guard is located directly above the driving platform.

[0014] The utility model has the following beneficial effects: the lower end of the lifting chain is movably fixed to the frame through the contact block, and the upper end of the lifting chain is connected to the driving platform and can drive the driving platform to perform lifting movements. The weight of the driving platform will straighten the lifting chain, so that the contact block can always maintain a state of abutting against the bottom of the positioning plate on the frame. Once the lifting chain is loose, the contact block will fall downward for a distance. During this process, the contact block will be connected to the contact switch, thereby triggering the contact switch. At this time, the driver can clearly know that the lifting chain is loose, thereby improving safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the embodiment;

[0016] Figure 2 yes Figure 1 A is an enlarged structural diagram of FIG.

[0017] In the figure:

[0018] 1. Frame assembly; 11. Frame; 111. Positioning plate; 12. Driving platform; 13. Top guard;

[0019] 2. lifting assembly; 21. lifting chain; 211. connecting end; 212. locking nut;

[0020] 3. Monitoring component; 31. Contact switch; 32. Contact block; 321. Abutment portion. DETAILED DESCRIPTION

[0021] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0022] like Figure 1-2 As shown, a lifting platform vehicle comprises a frame assembly 1, a lifting assembly 2 and a monitoring assembly 3. The frame assembly 1 comprises a frame 11 and a driving platform 12 which can be lifted and lowered on the frame 11. The driving platform 12 is used for a driver to stand and operate. The lifting assembly 2 comprises a lifting chain 21 arranged on the frame 11 in a vertical direction. The lower end of the chain is connected to the frame 11, and the upper end of the chain is connected to the driving platform 12. The monitoring assembly 3 comprises a contact switch 31 and a contact block 32. The contact block 32 is fixed to the lower end of the lifting chain 21 and is used to limit the lower end of the lifting chain 21. The upper end of the lifting chain 21 is wound around the fixed pulley and connected to the driving platform 12. The gravity of the driving platform 12 can drive the lifting chain 21 to straighten. Once the lifting chain 21 is loose, the contact block 32 will move downward. When it drops to a preset height, the contact block 32 will abut against the contact switch 31, and then the contact switch 31 sends a signal to determine that the lifting chain 21 is loose, so that maintenance can be carried out in time to improve safety performance.

[0023] Of course, in this embodiment, the lifting assembly 2 also includes a lifting cylinder, the fixed pulley is fixed on the piston rod of the lifting cylinder, and the lifting cylinder is used to drive the fixed pulley to move up and down, and then drive the driving platform 12 to move up and down.

[0024] In order to provide an alarm to the driver, the monitoring component 3 also includes an alarm, which is electrically connected to the contact switch 31. After the contact switch 31 senses the signal, it transmits the signal to the alarm and issues an alarm through the alarm, so that the driver can receive information that the lifting chain 21 is loose.

[0025] In order to trigger the contact switch 31, a truncated cone-shaped abutment portion 321 is provided at the lower part of the contact block 32. The diameter of the upper part of the abutment portion 321 is larger than the diameter of the lower part of the abutment portion 321. When the contact block 32 drops to a preset height, the side of the abutment portion is in contact with the contact switch 31. Of course, the preset height can be designed according to actual needs. The inclined edge is used to abut the contact switch 31, which can ensure its connection with the contact switch 31 and avoid damage to the contact switch 31 caused by direct downward pressure of the contact block 32.

[0026] In order to achieve the positioning of the lower end of the lifting chain 21, a positioning plate 111 extending outward is provided on one side of the bottom of the frame 11, and the lower end of the lifting chain 21 is set as a connecting end 211, which can pass through the positioning plate 111 and be located below the positioning plate 111. The contact block 32 is located on the connecting end 211 and can abut against the bottom of the positioning plate 111. As mentioned above, under normal circumstances, due to the gravity of the driving platform 12, the lower end of the lifting chain 21 can be driven to move upward, which drives the contact block 32 to abut against the positioning plate 111 to limit the lower end of the lifting chain 21 from continuing to move upward.

[0027] Specifically, in order to facilitate the replacement of the contact block 32 and the adjustment of the position of the contact block 32, a threaded section is provided on the connecting end 211, and the contact block 32 is movably sleeved on the connecting end 211. A locking nut 212 is provided on the threaded section. The locking nut 212 can abut against the bottom of the contact block 32 and cooperate with the bottom of the positioning plate 111 to clamp the contact block 32. When the locking nut 212 is unscrewed, the contact block 32 can be removed, which is convenient for replacing the contact block 32 and also convenient for the installation and disassembly of the lifting chain 21. At the same time, the position of the contact block 32 can be adjusted by the locking nut 212.

[0028] In order to provide protection for the driver, the frame assembly 1 also includes a roof guard 13 located on the top of the frame 11. The roof guard 13 is located directly above the driving platform 12 to provide protection for the driver's head to prevent debris from falling and injuring the driver.

[0029] The technical solution of the utility model is described in detail above in conjunction with the accompanying drawings, and the described embodiments are used to help understand the idea of ​​the utility model. The specific embodiments described herein are merely examples of the spirit of the utility model. A person skilled in the art of the utility model may make various modifications or supplements to the described specific embodiments or replace them in a similar manner, but this will not deviate from the spirit of the utility model or exceed the scope defined by the attached claims.

[0030] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A lifting platform vehicle, characterized in that: include: A vehicle frame assembly, comprising a vehicle frame and a driving platform that can be lifted and lowered on the vehicle frame; A lifting assembly, comprising a lifting chain arranged on the frame in a vertical direction, wherein the lower end of the lifting chain is connected to the frame, and the upper end of the lifting chain is connected to the driving platform, and is used to drive the driving platform to perform lifting motion; The monitoring component includes a contact switch and a contact block. The contact block is fixed to the lower end of the lifting chain and is used to limit the rise of the lower end of the lifting chain. The contact switch is fixed to the frame and is located below the contact block. When the contact block descends to a preset height, the contact block can be connected to the contact switch.

2. A lifting platform vehicle according to claim 1, characterized in that: A truncated cone-shaped abutment portion is provided at the lower portion of the contact block, the diameter of the upper portion of the abutment portion is greater than the diameter of the lower portion of the abutment portion, and when the contact block descends to a preset height, the side of the abutment portion contacts the contact switch.

3. A lifting platform vehicle according to claim 1 or 2, characterized in that: A positioning plate extending outward is provided on one side of the bottom of the frame, the lower end of the lifting chain is set as a connecting end, the connecting end can pass through the positioning plate and be located below the positioning plate, the contact block is located on the connecting end and can abut against the bottom of the positioning plate.

4. A lifting platform vehicle according to claim 3, characterized in that: The connection end is provided with a threaded section, the contact block is movably sleeved on the connection end, the threaded section is provided with a locking nut, and the locking nut can abut against the bottom of the contact block.

5. The lifting platform vehicle according to claim 1, characterized in that: The monitoring component also includes an alarm, and the alarm is connected to the contact switch by an electrical signal.

6. The lifting platform vehicle according to claim 1, characterized in that: The frame assembly also includes a roof guard located on the top of the frame, and the roof guard is located directly above the driving platform.

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