CN216807848U - Weight detection mechanism, weight limiter, lifting equipment - Google Patents

Abstract

The utility model discloses a weight detection mechanism, a weight limiter and hoisting equipment, and relates to the technical field of hoisting. The weight detection mechanism comprises a connecting assembly, a pulley, a pin shaft type sensor and a tension detection assembly, wherein one end of the connecting assembly is used for being pivoted with the crane boom; the pulley is used for connecting a hoisting rope, the pulley is sleeved on the pin shaft type sensor, and the pin shaft type sensor is connected with the connecting component; one end of the tension detection assembly is pivoted with the connecting assembly, and the other end of the tension detection assembly is used for being pivoted with the crane boom. The pin shaft type sensor and the tension detection assembly are more convenient to be made into a split type, so that the pin shaft type sensor and the tension detection assembly can be more conveniently and independently detected or maintained when the weight detection structure is abnormal in weight detection function and needs to be maintained, the detection and maintenance complexity is reduced, the maintenance time is shortened, and the maintenance cost is reduced.

Description

Weight detection mechanism, weight limiter, lifting equipment

technical field

The utility model relates to the technical field of lifting, in particular to a weight detection mechanism, a weight limiter and a lifting device.

Background technique

The weight limiter is used in tower cranes and other lifting equipment, and is one of the most important safety protection devices. The overloading of the boom may cause accidents (bending, deformation, fracture, etc., which may cause the crane to overturn in serious cases). Correct use of the weight limiter can achieve the purpose of protecting the safety of the crane and the operator.

There are two types of weight detection mechanisms for the lifting capacity limiter, one is mechanical (spring lever principle) measurement, and the other is electronic (pressure sensor principle) measurement. At present, the use mode adopted by the weight detection mechanism is an integrated mode of mechanical and electronic, with a compact structure. However, after the lifting limiter is damaged, the maintenance technical requirements are high, the time-consuming is long, and the overall maintenance cost is relatively high.

Utility model content

The main purpose of the utility model is to propose a weight detection mechanism, which aims to reduce the maintenance cost.

In order to achieve the above purpose, the weight detection mechanism proposed by the present utility model includes a connecting component, a pulley, a pin sensor, and a tension detection component. One end of the connecting component is used for pivoting with the boom; the pulley is used for connecting Lifting rope, the pulley is sleeved on the pin sensor, and the pin sensor is connected with the connection component; one end of the tension detection component is pivotally connected with the connection component, and the tension detection The other end of the assembly is used for pivoting with the boom.

Optionally, the connection assembly includes a first connection part, a second connection part, and a third connection part arranged in sequence, the first connection part is used for pivoting with the boom, the second connection part The third connecting part is used for connecting with the pin sensor, and the third connecting part is pivotally connected with the tension detection assembly. The first connecting part, the second connecting part and the third connecting part are arranged in sequence, so that the second pivoting part for connecting with the pin sensor is located in a relatively central position of the connecting assembly, the connecting assembly forms a lever structure, and the lifting rope The transmitted force can be amplified at the third connection portion relative to the second connection portion, which is beneficial to the tension detection assembly to reduce detection errors.

Optionally, the ratio between the distance from the first connecting part to the second connecting part and the distance from the second connecting part to the third connecting part is greater than 1.3 and less than 2, so as to avoid the need for excessive tension detection components. At the same time of the large measuring range, the force transmitted by the hoisting rope can be appropriately amplified at the third connection part relative to the second connection part, which is more conducive to the detection of the tension detection assembly.

Optionally, the connection part where the connection component is pivotally connected to the tension detection component is located between the connection part of the connection component used for pivot connection with the boom and the boom and the pin sensor. Between the pivoted connection parts, the pivoted connection part of the connection assembly and the tension detection assembly is located in the relatively central position of the connection assembly, so that the force transmitted by the hoisting rope can be reduced at the tension detection assembly, and the weight detection mechanism is more efficient. Lifting equipment suitable for larger capacity.

Optionally, the connecting assembly includes a first connecting body and a second connecting body arranged side by side, an installation gap is provided between the first connecting body and the second connecting body, and one end of the pin sensor is Connected with the first connecting body, the other end of the pin sensor is connected with the second connecting body; the pulley is at least partially arranged in the installation gap. The connecting assembly includes a first connecting body and a second connecting body arranged side by side, an installation gap is set between the first connecting body and the second connecting body, one end of the pin sensor is connected with the first connecting body, and the other end of the pin sensor is connected to the first connecting body. The other end is connected with the second connecting body, so that the weight detection mechanism can bear the load and make the whole more stable, so that the weight detection of the pin-type sensor is more accurate.

Optionally, the outer side of the first connecting body and/or the outer side of the second connecting body is provided with a reinforcing body, and the reinforcing body is connected with the pin sensor, so that the pin sensor can withstand more The weight of the weight detection mechanism is improved without causing damage to the connecting components, and the measurement range of the weight detection mechanism is improved.

Optionally, the connecting assembly is provided with a pivoting seat, the first connecting body and the second connecting body are both fixedly connected to the pivoting seat; the pivoting seat is provided with a pivoting slot, Both side walls of the pivoting slot are pivotally connected to the tensile force detection component, so that the connection component is more stable as a whole when the boom is connected, and the weight detection of the tensile force detection component is more accurate.

Optionally, the pin sensor is detachably connected to the connection assembly, and one end of the connection assembly is used for detachable connection with the boom; one end of the tension detection assembly is detachable from the connection assembly. detachable connection, the other end of the tension detection assembly is used for detachable connection with the boom; and/or, the first connecting body and the second connecting body both include channel steel, and the channel steel is The slotted side is disposed outward; and/or, the tensile force detection assembly includes a force measuring ring. The pin sensor is detachably connected with the connecting component, one end of the connecting component is used for detachable connection with the boom, one end of the tension detection component is detachably connected with the connecting component, and the other end of the tension detection component is used for detachable connection with the boom. The disassembly connection improves the disassembly and assembly convenience of the weight detection mechanism, further reduces the maintenance time, and further reduces the maintenance cost.

The utility model also provides a weight limiter, comprising a switch circuit for disconnecting the power supply of the driving device of the boom, including the weight detection mechanism, the pin sensor, the tension detection mechanism The components are all electrically connected to the switch circuit.

The utility model also proposes a lifting device, which includes a lifting arm and the above-mentioned weight limiter.

The technical solution of the present utility model is to set the weight detection mechanism to include a connection component, a pulley, a pin sensor and a tension detection component. One end of the connection component is used for pivoting with the boom; the pulley is used for connecting the lifting A heavy rope, the pulley is sleeved on the pin sensor, and the pin sensor is connected with the connection component; one end of the tension detection component is pivotally connected to the connection component, and the tension detection component The other end is used for pivoting with the boom; the pin sensor and tension detection assembly are more favorable to be split, so that when the weight detection function is abnormal and needs to be repaired, the pin sensor can be more easily detected. The sensor and the tension detection component are tested or maintained separately, which reduces the complexity of detection and maintenance, reduces maintenance time, and reduces maintenance costs.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are just some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained based on the structures shown in these drawings without any creative effort.

FIG. 1 is a front view of an embodiment of the weight detection mechanism of the present invention.

FIG. 2 is a left side view of a connecting assembly in an embodiment of the weight detection mechanism of the present invention.

Description of reference numbers:

The realization, functional characteristics and advantages of the purpose of the present utility model will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, not all of them. Example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

It should be noted that if there are directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention, the directional indications are only used to explain the relationship between the various components under a certain posture. If the specific posture changes, the directional indication also changes accordingly.

In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for the purpose of description, and should not be construed as instructions or Implicit their relative importance or implicitly indicate the number of technical features indicated. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In addition, if "and/or" or "and/or" appears in the whole text, its meaning includes three parallel schemes, taking "A and/or B" as an example, including scheme A, or scheme B, or scheme A and A scheme that satisfies both B. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of such technical solutions does not exist. , is not within the scope of protection required by the present utility model.

The utility model provides a weight detection mechanism.

1 and 2, in an embodiment of the present utility model, the weight detection mechanism includes a connection assembly 1, a pulley 2, a pin sensor 3, and a tension detection assembly 4. In this embodiment, the tension detection assembly 4 includes a force measurement The ring, the pulley 2 is a fixed pulley, and one end of the connecting assembly 1 (the left end as shown in Figure 1) is used for pivoting with the boom 5, and the pivoting connection is rotationally connected through the pivot, that is, one end of the connecting assembly 1 (such as The left end shown in FIG. 1 ) is used for rotational connection with the boom 5 through a pivot, so that the connection assembly 1 can rotate or swing relative to the boom 5 . In this embodiment, the specific connecting component of the boom 5 is a top chord. The pulley 2 is used to connect the hoisting rope, the pulley 2 is sleeved on the pin sensor 3, and the pin sensor 3 is connected with the connecting component 1, that is, the pulley 2 is pivotally connected with the connecting component 1, and the gravity borne by the hoisting rope passes through the pulley. 2 acts on the pin-type sensor 3, so that the pin-type sensor 3 can detect the weight of the lifting; one end of the tension detection component 4 (the lower end as shown in Figure 1) is pivotally connected with the connecting component 1, and the tension detection component 4 is connected. The other end (the upper end shown in FIG. 1 ) is used for pivot connection with the boom 5 . The pin-type sensor 3 and the tension detection component 4 are more convenient to be separated, so that when the weight detection structure is abnormal and needs to be repaired, the pin-type sensor 3 and the tension detection component 4 can be more easily detected or maintained separately. , reducing the complexity of detection and maintenance, reducing maintenance time and maintenance costs.

As an optional embodiment, the connection assembly 1 includes a first connection part 11 , a second connection part 12 , and a third connection part 13 arranged in sequence. In this embodiment, the first connection part 11 , the second connection part 12 , the third connection part 12 The three connecting parts 13 are arranged in a row from left to right in FIG. 1 . The first connecting portion 11 is used for pivoting with the boom 5 , the second connecting portion 12 is used for connecting with the pin sensor 3 , and the third connecting portion 13 is pivotally connected with the tension detection assembly 4 . The first connecting part 11 , the second connecting part 12 , and the third connecting part 13 are arranged in sequence, so that the second pivoting part for connecting with the pin sensor 3 is located at a relatively central position of the connecting assembly 1 , and the connecting assembly 1 forms With the lever structure, the force transmitted by the hoisting rope can be amplified at the third connecting portion 13 relative to the second connecting portion 12 , which is beneficial for the tension detection assembly 4 to reduce the detection error.

As an optional implementation manner, the distance from the first connection part 11 to the second connection part 12 (L1 shown in FIG. 1 ) is the distance from the second connection part 12 to the third connection part 13 (as shown in FIG. 1 ) The ratio of L2) is greater than 1.3 and less than 2, so that the force transmitted by the hoisting rope at the third connecting part 13 relative to the second connecting part 12 can be properly obtained while avoiding the need for an excessively large range of the tension detection assembly 4. The enlargement is more conducive to the detection of the tensile force detection component 4 . Further as a preferred embodiment, the distance from the first connection part 11 to the second connection part 12 (L1 as shown in FIG. 1 ) is the same as the distance from the second connection part 12 to the third connection part 13 (as shown in FIG. 1 ). The ratio of L2) is greater than 1.4 and less than 1.6.

As an optional embodiment, the connecting assembly 1 includes a first connecting body 14 and a second connecting body 15 arranged side by side, the first connecting body 14 and the second connecting body 15 both include channel steel, and the slotted side of the channel steel faces outwards Installation; an installation gap 16 is provided between the first connecting body 14 and the second connecting body 15 , one end of the pin sensor 3 is connected to the first connecting body 14 , and the other end of the pin sensor 3 is connected to the second connecting body 15 Connection; the pulley 2 is at least partially arranged in the installation gap 16 . In this embodiment, the pulley 2 is arranged to be partly arranged in the installation gap 16 , and the upper and lower ends protrude from the installation gap 16 and the connection component 1 . The connecting assembly 1 includes a first connecting body 14 and a second connecting body 15 arranged side by side, an installation gap 16 is provided between the first connecting body 14 and the second connecting body 15, and one end of the pin sensor 3 is connected to the first connecting body. 14 is connected, and the other end of the pin sensor 3 is connected with the second connecting body 15, so that the weight detection mechanism can make the whole body more stable under load bearing, and make the weight detection of the pin sensor 3 more accurate.

As an optional embodiment, a reinforcing body 17 is provided on the outside of the first connecting body 14 and the outside of the second connecting body 15 , and the reinforcing body 17 is connected with the pin sensor 3 , so that the pin sensor 3 can withstand more The weight of the weight detection mechanism is increased without causing damage to the connecting assembly 1, and the measurement range of the weight detection mechanism is improved. In this embodiment, the reinforcing body 17 is set as a reinforcing plate, and the plate plane of the reinforcing plate is in contact with the outside of the first connecting body 14 and the outside of the second connecting body 15, and is fixed by fasteners such as bolts.

As an optional embodiment, the connecting assembly 1 is provided with a pivoting seat 18, and the first connecting body 14 and the second connecting body 15 are fixedly connected to the pivoting seat 18, and can be fixedly connected by welding, bolting, etc. . In this embodiment, the central pivot seat 18 is welded by three plates to form a U-shape as a whole. The pivot seat 18 is provided with a pivot slot 181, and both side walls of the pivot slot 181 are pivotally connected to the tension detection assembly 4, so that the connection assembly 1 is more stable as a whole when the boom 5 is connected, and the tension detection assembly 4 is connected. Weight detection is more accurate.

As an optional embodiment, the pin sensor 3 is detachably connected to the connection assembly 1 , for example, the two ends of the pin sensor 3 are respectively provided in the form of connection keys and latches. One end of the connection assembly 1 is used for detachable connection with the boom 5, and can be configured to be connected through a pin shaft and the end of the pin shaft is provided with a connection key, a latch and other structures; one end of the tension detection assembly 4 is detachably connected to the connection assembly 1. , can be set to be connected by a pin, and the end of the pin is provided with a connection key, a pin and other structures; the other end of the tension detection assembly 4 is used for detachable connection with the boom 5, and can be set to be connected by a pin The end of the hoist is provided with connecting keys, pins and other structures; the pin sensor 3 is detachably connected with the connecting assembly 1, one end of the connecting assembly 1 is used for detachable connection with the boom 5, and one end of the tension detection assembly 4 is connected with the connecting assembly 1. Removable connection, the other end of the tension detection component 4 is used for detachable connection with the boom 5, which improves the disassembly and assembly convenience of the weight detection mechanism, further reduces the maintenance time, and further reduces the maintenance cost.

As an alternative embodiment, what is different from the above-mentioned embodiment is that the connecting part where the connecting component 1 is pivotally connected with the tension detection component 4 is located at the connecting part where the connecting component 1 is used for pivotally connecting with the boom 5 and the hoisting part. Between the pivoted connection part of the arm 5 and the pin sensor 3, the pivoted connection part of the connection component 1 and the tension detection component 4 is located in the relatively central position of the connection component 1, so that the force transmitted by the hoisting rope can be detected in the tension detection. Component 4 can be reduced, so that the weight detection mechanism is more suitable for lifting equipment with larger lifting capacity.

The utility model also proposes a weight limiter, which includes a switch circuit, which is used to disconnect the power supply of the driving device of the boom 5, and includes the above-mentioned weight detection mechanism. The pin sensor 3 and the tension detection component 4 are connected to The switch circuit is electrically connected. The specific structure of the weight detection mechanism refers to the above-mentioned embodiments. Since the weight limiter adopts all the technical solutions of the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here. One more elaboration.

The utility model also proposes a lifting device, which includes a lifting arm and the above-mentioned weight limiter. The pin sensor 3 and the tension detection component 4 convert the load weight into an electrical signal, and through operational amplification, indicate the value of the load. When the loaded load reaches the preset multiple rated load, an overload alarm signal is issued and the action in the upward direction is cut off. The above-mentioned lifting equipment has passed the actual working test of the combination of various components, and the test effect is good, which basically meets the requirements of sensitivity, safety and stability during work, and can be quickly disassembled for maintenance and installation when needed. The maintenance time is reduced, the maintenance efficiency is improved, and the consumption of manpower and material resources and the expenditure of funds are saved. The specific structure of the weight limiter refers to the above-mentioned embodiments. Since the lifting equipment adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here. One more elaboration.

The above are only preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model patent. Under the concept of the utility model of the present utility model, the equivalent structure transformations made by using the contents of the present utility model description and accompanying drawings, Or directly/indirectly applied in other related technical fields are included in the scope of patent protection of the present invention.

Claims (10)

1. A weight detection mechanism is characterized by comprising a connecting assembly, a pulley, a pin shaft type sensor and a tension detection assembly, wherein one end of the connecting assembly is used for being pivoted with a crane boom; the pulley is used for connecting a hoisting rope, the pulley is sleeved on the pin shaft type sensor, and the pin shaft type sensor is connected with the connecting component; one end of the tension detection assembly is pivoted with the connecting assembly, and the other end of the tension detection assembly is pivoted with the crane boom.

2. The weight-sensing mechanism according to claim 1, wherein the connecting assembly includes a first connecting portion, a second connecting portion and a third connecting portion, the first connecting portion is pivotally connected to the boom, the second connecting portion is pivotally connected to the pin-type sensor, and the third connecting portion is pivotally connected to the tension-sensing assembly.

3. The weight detecting mechanism according to claim 2, wherein a ratio of a distance from the first connecting portion to the second connecting portion to a distance from the second connecting portion to the third connecting portion is greater than 1.3 and less than 2.

4. The weight sensing mechanism of claim 1, wherein the connection of the coupling assembly to the tension sensing assembly is between the connection of the coupling assembly to the boom and the connection of the boom to the pin-type sensor.

5. The weight sensing mechanism of claim 1, wherein the connecting assembly includes a first connecting body and a second connecting body arranged side by side, a mounting gap is provided between the first connecting body and the second connecting body, one end of the pin-type sensor is connected to the first connecting body, and the other end of the pin-type sensor is connected to the second connecting body; the pulley is at least partially disposed within the mounting gap.

6. The weight-sensing mechanism according to claim 5, wherein a reinforcing member is provided at an outer side of the first connecting body and/or an outer side of the second connecting body, and the reinforcing member is connected to the pin-type sensor.

7. The weight detecting mechanism of claim 5, wherein the connecting assembly is provided with a pivot seat, and the first connecting body and the second connecting body are fixedly connected with the pivot seat; the pin joint seat is provided with a pin joint groove, and two side walls of the pin joint groove are in pin joint with the tension detection assembly.

8. The weight sensing mechanism of claim 5, wherein the pin-type sensor is removably coupled to the coupling assembly, the coupling assembly having one end for removable coupling to the boom; one end of the tension detection assembly is detachably connected with the connecting assembly, and the other end of the tension detection assembly is detachably connected with the crane boom; and/or the first connecting body and the second connecting body comprise channel steel, and the slotted side of the channel steel is arranged outwards; and/or the tension detection assembly comprises a force measuring ring.

9. A weight limiter comprising a switch circuit for disconnecting the power supply of a drive device of a boom, characterized by comprising the weight detecting mechanism according to any one of claims 1 to 8, wherein the pin sensor and the tension detecting member are electrically connected to the switch circuit.

10. A lifting device comprising a crane arm, further comprising a weight limiter as in claim 9.

Images