TWI760997B - Load protection device for telescopic rod - Google Patents

Abstract

The present invention relates to a load protection device for a telescopic rod. The main structure includes a lifting device, a bearing platform, a movable slot, a pressure sensing part, a driving device, a disconnection part, an extrusion part, and a Limits. With the above structure, the driving device can be manipulated to make the lifting device go up and down, and when the loading platform is overloaded during the lifting process, the limiting member will move from one side of the movable groove toward the pressure sensing member, so that the extruding member is moved. Squeeze the pressure sensing element, and then make the power-off element drive the driving device to stop the rising action. In this way, it can achieve the effect of automatic power-off and avoid overloading of the bearing platform, thereby improving the overall service life and safety.

Description

Load protection device for telescopic rod

The present invention is to provide a load protection device for a telescopic rod, especially a load protection device for a telescopic rod that automatically cuts off the power when the bearing pressure is too large to avoid overloading of the bearing platform, thereby improving the service life and safety of the lifting device.

According to the press, the lifting device is used to raise or lower objects to a specific height, such as: elevators, car lifts, fire lifts, etc. All belong to a type of lifting device. With the evolution of the times, there are also endless types of lifting devices.

The load-bearing platform on the traditional lifting device will have a load-bearing weight limit. When the preset load-bearing weight is exceeded, overloading will occur. In addition, if the operator is distracted during the lifting and lowering process, the load on the bearing platform will be affected. If the heavy object collides with the ceiling or obstacle, and the driving device continues to give the lifting power to the bearing platform, the clutch and other components in the driving device will be tripped or worn out. The overall structural strength is gradually reduced. At this time, the user must return the lifting device to the original factory for maintenance.

When the user wants to use the lifting device, it is usually necessary to transport the heavier object to a higher position. In order to avoid overloading the bearing platform, the weight of the heavy object must be measured first. However, the heavy object itself is difficult to use with ordinary scales. Heavy equipment is used for measurement, and if the weight of the heavy object must be measured every time the lifting device is used to evaluate whether it will be overloaded, the overall work efficiency will be reduced. The change of load-bearing weight makes it impossible to use a simple solution to avoid overloading of the lifting device and damage to internal parts.

Therefore, how to solve the above-mentioned conventional problems and deficiencies is the direction that the applicant of the present invention and related manufacturers in the industry are eager to research and improve.

Therefore, in view of the above deficiencies, the applicant of the present invention collects relevant information, evaluates and considers from various parties, and uses years of experience accumulated in this industry, through continuous trial production and revision, to design this kind of when the load pressure is too large. The patentee of the invention patent of the load protection device of the telescopic rod with automatic power-off to avoid overloading of the bearing platform, thereby improving the service life and safety of the lifting device.

The main purpose of the present invention is: through the design that the driving device is pivoted on the lifting device, and the limiter is movably arranged in the movable groove, when the bearing platform is overloaded, the extrusion member can be pressed against the pressure sensing member, so as to make the bearing The table stops rising, thereby improving the overall service life and safety.

In order to achieve the above object, the main structure of the present invention includes: a lifting device, a bearing platform is arranged on one side of the lifting device, a movable groove is formed on the lifting device, and a pressure sensing member is also provided on the lifting device, and the pressure sensing The component is adjacent to the second side, and the lifting device is pivotally provided with a driving device. The driving device is provided with a disconnecting component, and the disconnecting component is electrically connected to the pressure sensing component, and the driving device is also provided with a pressing device. The position of the extruding piece corresponds to the pressure sensing piece. In addition, the extruding piece is provided with a limiting piece, and the limiting piece is movably arranged in the movable groove.

Through the above structure, when the user places a heavy object on the bearing platform, then the driving device starts to act, thereby driving the bearing platform to extend upward. At this time, the movable limiter arranged in the movable groove will increase with the bearing pressure. , and approaching the pressure sensing piece, when the extrusion piece collides with the pressure sensing piece and the rising height continues to increase, the pressure on the pressure sensing piece will increase accordingly, and when the pressure exceeds the preset value, the In the event of overload, the pressure sensor will transmit the overload signal to the power-off device, so that the power-off device will cut off the power of the drive device, and then the drive device will stop rising. At the same time, in order to avoid danger, the drive device After the ascending power is cut off, it will be converted into descending power by itself, so that the lifting device can be lowered to achieve the purpose of eliminating the situation.

In this way, the power can be automatically cut off when the bearing platform is subjected to excessive pressure, so as to avoid the wear of parts caused by long-term overload use, which not only improves the overall service life, but also ensures the safety during operation.

With the above-mentioned technology, the conventional lifting device can overcome the problems of long-term overload, which is easy to cause wear and tear, and repeated measurement of the weight of the object, which leads to low work efficiency, and achieves the practical progress of the above advantages.

1. 1a: Lifting device

11, 11a: Active slot

111: First side

112: Second side

12: Turning parts

13: Perforation

14: Telescopic rod

15, 15a: frame body

151a: first bracket

152a: Second bracket

153a: bracket clip

1531a: base

1532a: Spring

1533a: Tenon

16a: Kit

2, 2a: carrying platform

21a: stage engaging piece

3: Pressure sensor

4, 4a: drive device

401: Driver

402: Winding parts

41: Power off

42: Extrusion

421, 421a: limiter

43: Pivot

44a: Emergency stop

5: Driving parts

6: Heavy objects

The first figure is a perspective perspective view of a preferred embodiment of the present invention.

The second figure is a perspective view of a preferred embodiment of the present invention.

Figure 3 is an exploded view of a preferred embodiment of the present invention.

The fourth figure is a schematic diagram of the rise of the preferred embodiment of the present invention.

Figure 5 is a schematic diagram of sensing according to a preferred embodiment of the present invention.

Figure 6 is a schematic diagram of a power-off of a preferred embodiment of the present invention.

Figure 7 is an exploded view of yet another preferred embodiment of the present invention.

Fig. 8 is a schematic diagram of adjusting the extension length of another preferred embodiment of the present invention.

Fig. 9 is a schematic diagram of disassembly of another preferred embodiment of the present invention.

In order to achieve the above objects and effects, the technical means and structures adopted by the present invention are described in detail with reference to the preferred embodiments of the present invention, and the features and functions are as follows, so as to be fully understood.

Please refer to the first to third figures, which are three-dimensional perspective views to exploded views of the preferred embodiment of the present invention. It can be clearly seen from the figures that the present invention includes:

a lifting device 1;

a bearing platform 2, the bearing platform 2 is arranged at one side of the lifting device 1;

a movable slot 11, the movable slot 11 is arranged on the lifting device 1;

a pressure sensing element 3, the pressure sensing element 3 is arranged on the lifting device 1 and is adjacent to the movable slot 11;

a driving device 4, the driving device 4 is pivoted on the lifting device 1 for driving the supporting platform 2 to lift;

A power-off device 41 , the power-off device 41 is arranged in the driving device 4 and is electrically connected to the pressure sensing member 3 for stopping the driving device 4 after receiving the signal transmitted by the pressure sensing member 3 run;

an extrusion part 42, the extrusion part 42 is disposed on the driving device 4 and the position corresponds to the pressure sensing part 3; and

A limiting member 421, the limiting member 421 is disposed on the extruding member 42, and is movably disposed in the movable groove 11, the limiting member 421 is moved in the movable groove 11 for the extruding member 42 squeezes the pressure sensing member 3 .

The driving device 4 has a driving member 401 and a winding member 402 connected to the driving member 401 , and the lifting device 1 is provided with a plurality of rotating members 12 connected to the carrying platform 2 , and these rotating members A driving member 5 is wound around the member 12 and the winding member 402 . In addition, a side of the driving member 5 away from the winding member 402 is connected to the carrying platform 2 .

A first side 111 and a second side 112 are respectively formed on both sides of the movable slot 11 .

Wherein, the lifting device 1 is formed with a plurality of through holes 13 , and the driving device 4 is provided with a pivot shaft 43 passing through the through holes 13 .

The lifting device 1 includes a plurality of telescopic rods 14 connected to the carrying platform 2 , and a plurality of frame bodies 15 connected to the side of the telescopic rods 14 away from the carrying platform 2 .

Preferably, the driving member 401 is a gearbox formed by a combination of a motor and a gear. However, the purpose of the driving member 401 in this case is only to drive the lifting device 1 to ascend and descend, so the internal structure of the driving member 401 is not limited.

Preferably, the limiting member 421 and the pivot shaft 43 are in a rod state.

Preferably, the rotating member 12 is a pulley.

Preferably, the driving member 5 is one of steel cables or cables.

Preferably, the driving member 5 is connected to the bearing platform 2 through the telescopic rod 14 .

Preferably, the pressure sensing element 3 is a pressure sensor.

From the above description, the structure of the present technology can be understood, and according to the corresponding cooperation of this structure, the power can be automatically cut off when the bearing pressure of the bearing platform 2 is too large, so as to prevent the bearing platform 2 from being overloaded, and then the lifting device 1 can be lifted. Service life and safety, and a detailed explanation will be described below.

Please also refer to the first figure to the sixth figure, which are the three-dimensional perspective view to the power-off schematic diagram of the preferred embodiment of the present invention. 1. The frame body 15 is erected on the ground. When the driving device 4 has not been activated, the limiting member 421 is in contact with the first side 111 of the movable slot 11. A weight 6 is placed on the support table 2, and then the driving device 4 is activated, so that the motor in the driving member 401 is connected to the The gear starts to act, so that the winding member 402 starts to rotate (as shown in the fourth figure). At this time, the winding member 402 performs the action of taking up the wire on the driving member 5, and is wound around the rotating member 12 through the expansion and contraction. The rod 14 is connected to the driving member 5 of the bearing platform 2 , which drives the bearing platform 2 to extend upward.

After the bearing platform 2 carrying the heavy object 6 gradually rises, the weight it bears will start to increase slowly due to the height elongation. The driving device 4 will also feel the increase in weight. At this time, due to the structure of the driving device 4 being pivoted to the lifting device 1 , the driving device 4 will rotate slightly counterclockwise with the pivot shaft 43 and the through hole 13 as the center of the circle. (As shown in the fifth figure), the limiting member 421 that originally abutted against the first side 111 is moved toward the second side 112, thereby driving the extrusion member 42 to abut against the pressure sensing member 3. At this time, the The pressure sensor 3 will start to calculate the current pressure on the bearing platform 2 , and when the gradually increasing pressure exceeds the preset value, it means that the bearing platform 2 has exceeded the loadable weight.

After the overload occurs, the pressure sensing element 3 will transmit the overload signal to the power-off element 41, and the power-off element 41 will cut off the power of the driving device 4, and then stop the driving device 4 and continue to drive the carrying platform 2 to rise. Then, after the lifting power of the driving device 4 is cut off, it will reverse itself, and instead drive the carrying platform 2 to descend (as shown in the sixth figure), thereby avoiding the danger caused by overloading.

In this way, when the pressure on the bearing platform 2 is gradually increased, the driving device 4 can stop rising and lower by itself through the structural matching of the pressure sensing element 3 and the power-off element 41, thereby achieving the effect of automatic power-off , to avoid damage to internal components caused by overloading of the carrying platform 2 , and at the same time, it can also improve the service life and safety of the lifting device 1 .

Please also refer to Figures 7 to 9, which are exploded views to disassembled schematic diagrams of still another preferred embodiment of the present invention. This embodiment is similar to the above-mentioned embodiment. In this embodiment, the frame body 15a has a first bracket 151a and a second bracket 152a connected to the side of the first bracket 151a, and the first bracket 151a is provided with a corresponding card The bracket engaging member 153a is engaged with the second bracket 152a, and the lifting device 1a is sleeved with a sleeve 16a, the driving device 4a is pivoted on the sleeve 16a, and the movable slot 11a is formed on the sleeve 16a. In addition, the driving device 4a is also electrically connected with an emergency stop member 44a, and the emergency stop member 44a is arranged on the driving device 4a, and a platform engaging member 21a is also provided at the position where the platform 2a is connected to the lifting device 1a.

Preferably, the bracket engaging member 153a includes a base portion 1531a, a A spring 1532a on one side of the base 1531a, and a tenon 1533a on the other side of the base 1531a, the spring 1532a is in contact with the first bracket 151a, and the tenon 1533a is in contact with the second bracket 152a (as shown in FIG. 8 ). shown).

Preferably, the sleeve 16a is combined with the lifting device 1a by means of screw locking.

Preferably, the emergency stop member 44a is in the form of a button as an example.

When the user presses the base 1531a adjacent to one side of the spring 1532a, the telescopic length of the second bracket 152a can be adjusted. After the adjustment is completed, the base 1531a is stopped, and the tenon 1533a will interfere with the engagement through the design of the spring 1532a. The first bracket 151a further maintains the relative position of the first bracket 151a and the second bracket 152a, so that the purpose of adjusting the telescopic length of the frame body 15a can be achieved, so that the present invention is suitable for different applications.

Through the above structure, the user can detach the set 16a from the lifting device 1a, and can also easily remove the driving device 4a or the limiting member 421a from the set 16a, which is convenient for the user to store, repair, or maintain. Operation.

When the user wants to stop the actuation of the drive device 4a in an emergency, the user only needs to press the emergency stop piece 44a to stop the actuation of the drive device 4a, and then in an emergency, the actuation of the drive device 4a can be quickly stopped manually to achieve a crisis. The effect of processing.

Through the structure of the stage engaging member 21a, it is convenient for the user to remove the stage 2a from the lifting device 1a, thereby facilitating the user to perform operations such as storage, repair, or maintenance.

However, the above descriptions are only the preferred embodiments of the present invention, which do not limit the patent scope of the present invention. Therefore, all simple modifications and equivalent structural changes made by using the contents of the description and drawings of the present invention should be the same. Included in the scope of the patent of the present invention, it is hereby stated.

Therefore, the key to improving the conventional technology of the load protection device of the telescopic rod of the present invention is:

First, through the design that the driving device 4 is pivoted on the lifting device 1 and the limiting member 421 is movably arranged in the movable groove 11, when the loading platform 2 is overloaded, the extrusion member 42 can be pressed against the pressure sensing member 3, Then, the lifting of the carrying platform 2 is stopped, so as to improve the overall service life and safety.

Second, through the first bracket 151a, the second bracket 152a, and the brackets are engaged The structural collocation of the parts 153a achieves the purpose of adjusting the telescopic length of the frame body 15a, so that the present invention is suitable for different occasions.

Third, through the structure of the stage engaging member 21a and the set 16a, it is convenient for the user to perform operations such as storage, repair, or maintenance.

Fourth, through the structure of the emergency stop member 44a, the driving device 4a can be quickly and manually stopped from operating in an emergency, so as to achieve the effect of crisis management.

To sum up, the load protection device of the telescopic rod of the present invention can indeed achieve its effect and purpose when it is used. Therefore, the present invention is an invention with excellent practicability. In order to meet the application requirements for an invention patent, it is proposed according to law For the application, I hope that the review committee will approve the invention as soon as possible, so as to protect the applicant's hard work in research and development.

1: Lifting device

12: Turning parts

13: Perforation

14: Telescopic rod

15: Frame

2: Bearing platform

3: Pressure sensor

4: Drive device

401: Driver

402: Winding parts

421: Limiter

43: Pivot

Claims (8)

A load protection device for a telescopic rod, which mainly includes: a lifting device; a bearing platform, the bearing platform is arranged at one side of the lifting device, and the lifting device has a plurality of telescopic rods connected to the bearing platform, and a plurality of a frame body connected to the side of the telescopic rods away from the bearing platform, each frame body has a first bracket and a second bracket connected to the side of the first bracket, and the first bracket is provided with a a bracket engaging piece corresponding to the second bracket; a movable slot, the movable slot is arranged on the lifting device; a pressure sensing piece, the pressure sensing piece is arranged on the lifting device and is adjacent to the lifting device a movable slot; a driving device, which is pivoted on the lifting device, and is used for driving the platform to lift and lower; a disconnecting element, which is arranged in the driving device and is electrically connected to the pressure sensor a measuring piece for stopping the operation of the driving device after receiving the signal transmitted by the pressure sensing piece; a pressing piece, which is arranged on the driving device and whose position corresponds to the pressure sensing piece; and a pressing piece a limiting piece, the limiting piece is arranged on the extruding piece and is movably arranged in the movable groove, the limiting piece is moved in the movable groove, and the extruding piece presses the pressure sensing piece . The load protection device for a telescopic rod as described in claim 1, wherein the driving device has a driving member and a winding member connected to the driving member, and the lifting device is provided with a plurality of connecting members connected to the bearing A rotating member of the platform, and a driving member is wound around the rotating members and the winding member, and a side of the driving member away from the winding member is connected to the carrying platform. The load protection device for a telescopic rod as described in claim 1, wherein two sides of the movable slot are respectively formed with a first side and a second side. The load protection device for a telescopic rod as described in claim 1, wherein a plurality of perforations are formed on the lifting device, and a pivot shaft is disposed on the driving device through the perforations. The load protection device for a telescopic rod as described in claim 1 of the scope of the patent application, wherein a platform engaging member is provided at the position where the platform is connected to the lifting device. The load protection device for a telescopic rod as described in claim 1, wherein a set is sleeved on the lifting device, the driving device is pivoted on the set, and the movable groove is formed on the set. The load protection device for a telescopic rod as described in claim 1, wherein the driving device is electrically connected with an emergency stop, and the emergency stop is arranged on the driving device. The load protection device for a telescopic pole as described in item 1 of the scope of the application, wherein a weight is arranged on the bearing platform.

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