Force standard machine and cantilever hoisting mechanism thereof

Abstract

The utility model provides a force standard machine and a cantilever hoisting mechanism thereof. The cantilever hoisting mechanism comprises a fixing frame, a rotating arm assembly and an electric hoist, the fixing frame comprises an upper fixing plate, a lower fixing plate and a pull rod, the rotating arm assembly comprises a rotating shaft, a rotating cylinder, a cantilever and a reinforcing connecting arm, and a walking roller at the upper end of the electric hoist is installed in a guide rail groove of the cantilever. The cantilever hoisting mechanism is directly installed on the vertical column of the force standard machine, a plant crane system does not need to be additionally arranged, the hoisting function is integrated to the equipment body, the problem that a traditional scheme depends on external hoisting equipment is solved, and the requirements for infrastructures such as the height of an installation site and crane rails are remarkably lowered. An operator can control the electric hoist on the ground to directly hoist a hundreds of kilograms of large force value sensors from the ground to the automatic sensor shifting mechanism of the movable cross beam, and the path limitation of traditional manual carrying is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to force standard machine technical field, concretely is force standard machine and cantilever hoisting mechanism thereof. BACKGROUND

[0002] In the modern industrial detection field, as the core element of accurate measurement of force value, force sensor is widely used in aerospace, automobile manufacturing, material mechanics and other key industries. Its measurement accuracy and reliability directly affect the performance and safety of the whole system, so it is very important to detect the force sensor with high precision. The force sensor is detected by using the force standard machine, which is an important means to ensure that the performance of the force sensor meets the standard. In the detection process, accurately moving and installing the detected force sensor to the center position of the counterforce frame is a key step to ensure the accuracy of the detection data.

[0003] The traditional force sensor installation method mainly relies on manual operation or simple auxiliary tools. For small and medium range force sensors, this method can still meet the basic needs. However, with the rapid development of industrial technology, large force value sensors are increasingly widely used in engineering practice. Such sensors usually have a large volume and weight, and the weight of a single sensor can reach hundreds of kilograms or even several tons. Relying on the traditional installation method not only consumes a lot of manpower and time cost, but also has a high safety risk in the process of carrying and installing, and it is difficult to ensure that the sensor is accurately installed to the center position of the counterforce frame, thereby affecting the detection accuracy.

[0004] To solve the problem of low installation efficiency of large force value sensors, some force standard machines are equipped with automatic displacement mechanisms for the measured sensors. However, the sensors still need to be lifted from the ground to the automatic displacement mechanism, so the factory needs to be specially equipped with a crane lifting system, which increases the requirements of the force standard machine for the installation and use site. UTILITY MODEL CONTENTS

[0005] In order to overcome the shortcomings of the prior art, the purpose of the utility model is to provide a force standard machine and a cantilever hoisting mechanism thereof.

[0006] To achieve the above purpose, the utility model solves the technical problems by adopting the following technical scheme: the cantilever hoisting mechanism comprises:

[0007] The fixed frame comprises an upper fixed plate, a lower fixed plate and a pull rod, one end of the upper fixed plate is fixedly installed at the top end of the force standard machine column, one end of the lower fixed plate is fixedly installed at the outer periphery of the column below the middle platform of the force standard machine main frame, and the upper and lower ends of the pull rod are connected to the upper fixed plate and the lower fixed plate, respectively;

[0008] The rotating arm assembly comprises a rotating shaft, a rotating drum, a cantilever and a reinforcing connecting arm, the upper end of the rotating shaft is rotatably installed on the other end of the upper fixed plate through a bearing, the lower end of the rotating shaft is rotatably installed on the other end of the lower fixed plate through a bearing, the upper and lower ends of the rotating drum are welded with the upper and lower ends of the rotating shaft through a connecting ring body, the rotating drum is coaxially arranged with the rotating shaft, one end of the cantilever is welded on the lower part of the outer periphery of the rotating drum, and the reinforcing connecting arm is connected between the rotating drum and the cantilever in a diagonal manner, and the cantilever is provided with a horizontally arranged guide rail groove.

[0009] The electric hoist is provided with walking rollers at the upper end, and the walking rollers are installed in the guide rail groove of the cantilever.

[0010] The cantilever can rotate in a large angle range around the column, and the horizontal movement of the electric hoist in the guide rail groove enables the hoisting range to cover the surrounding area of the main frame; an operator can directly hoist a heavy sensor of hundreds of kilograms from the ground to the sensor automatic displacement mechanism on the moving cross beam on the ground by controlling the electric hoist, thereby avoiding the path limitation of traditional manual carrying.

[0011] Further, the bearings between the upper and lower ends of the rotating shaft and the upper and lower fixed plates are conical roller bearings.

[0012] By adopting the above preferred scheme, the conical roller bearings simultaneously bear axial and radial forces, and the rotating arm assembly is stably rotated under heavy load.

[0013] Further, the upper end of the reinforcing connecting arm is connected with the upper part of the rotating drum through welding.

[0014] Further, the lower end of the reinforcing connecting arm is connected with the upper part of the cantilever through welding.

[0015] By adopting the above preferred scheme, the reinforcing connecting arm, the rotating drum and the cantilever form a triangular rigid frame through welding, and the hoisting load capacity is improved.

[0016] The force standard machine comprises:

[0017] The main frame comprises a base, a middle platform and a plurality of columns, the columns are vertically and fixedly installed on the base, and the middle platform is fixedly installed on the top end of the columns.

[0018] The force applying mechanism is installed on the middle platform of the main frame.

[0019] The counter-force frame comprises a top beam, a moving beam and two lead screws, the lower surface of the top beam is pressed against the force applying mechanism by a spherical pressure head, the lead screws are arranged downwardly from the top beam, the moving beam is installed on the lead screws, and a driving mechanism for driving the moving beam to move up and down along the lead screws is further installed on the moving beam;

[0020] The sensor automatic displacement mechanism is installed on one side of the moving beam, and is used for moving the measured sensor from one side of the main frame to the center test position of the moving beam.

[0021] The cantilever lifting mechanism is installed on one of the columns of the main frame.

[0022] By using the technical scheme, the electric hoist lifts the sensor from the ground to the displacement mechanism on one side of the moving beam, and the displacement mechanism automatically pushes the sensor to the center test position, so that the installation of the measured sensor is convenient, the manual intervention is less, and the detection efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0024] Figure 1 is one of the three-dimensional schematic views of an embodiment of the force standard machine.

[0025] Figure 2 is the second three-dimensional schematic view of an embodiment of the force standard machine.

[0026] Figure 3 is a three-dimensional view of an embodiment of the support module.

[0027] Figure 4 is a structural schematic view of another embodiment of the support module.

[0028] Figure 5 is a three-dimensional schematic view of another embodiment of the force standard machine.

[0029] Figure 6 is a three-dimensional schematic view of the fixed frame and the rotating arm assembly in the cantilever lifting mechanism.

[0030] Figure 7 is a structural schematic view of the cantilever lifting mechanism.

[0031] Figure 8 is a sectional view in the direction of A-A in the figure.

[0032] Corresponding components represented by numbers and letters in the figures:

[0033] 10 - main frame; 11 - base; 12 - middle platform; 13 - column; 20 - force applying mechanism; 30 - counterforce frame; 31 - top beam; 32 - moving cross beam; 33 - screw rod; 40 - sensor automatic displacement mechanism; 60 - support module; 61 - fixed frame; 611 - bottom plate; 612 - vertical plate; 613 - rib plate; 62 - guide rod; 621 - position detection ring; 63 - push plate; 64 - buffer pad; 65 - push driving mechanism; 651 - worm gear reducer; 652 - motor base; 653 - driving motor; 661 - first position detection sensor; 662 - second position detection sensor; 71 - horizontal block; 72 - top rod; 81 - fixed frame; 811 - upper fixed plate; 812 - lower fixed plate; 813 - pull rod; 82 - swing arm assembly; 821 - pivot shaft; 822 - swing cylinder; 823 - cantilever; 824 - reinforcing connecting arm; 825 - bearing; 826 - connecting ring body; 827 - guide rail groove; 83 - electric hoist. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0035] As shown in the drawings, one embodiment of the present application is: Figures 5-8 A cantilever lifting mechanism, comprising:

[0036] The fixed frame 81 comprises an upper fixed plate 811, a lower fixed plate 812 and a pull rod 813. One end of the upper fixed plate 811 is fixedly installed at the top end of the force standard machine column 13, one end of the lower fixed plate 812 is fixedly installed at the outer periphery of the column 13 below the middle platform 12 of the force standard machine main frame, and the upper and lower ends of the pull rod 813 are connected to the upper fixed plate 811 and the lower fixed plate 812, respectively;

[0037] A rotating arm assembly 82, which comprises a rotating shaft 821, a rotating drum 822, a cantilever arm 823 and a reinforcing connecting arm 824, the upper end of the rotating shaft 821 is rotatably installed on the other end of the upper fixed plate 811 through a bearing 825, the lower end of the rotating shaft 821 is rotatably installed on the other end of the lower fixed plate 812 through a bearing 825, the upper and lower ends of the rotating drum 822 are welded with the upper and lower ends of the rotating shaft 821 through a connecting ring body 826, the rotating drum 822 is coaxially arranged with the rotating shaft 821, one end of the cantilever arm 823 is welded on the lower part of the outer periphery of the rotating drum 822, and the reinforcing connecting arm 824 is connected between the rotating drum 822 and the cantilever arm 823 in a diagonal manner, and the cantilever arm 823 is provided with a horizontally arranged guide rail groove 827;

[0038] An electric hoist 83, the walking roller at the upper end of the electric hoist 83 is installed in the guide rail groove 827 of the cantilever arm, the electric hoist 83 can be obtained from the prior art, and the structure thereof will not be described herein, and the electric hoist is a small-sized lifting device which realizes the lifting, descending and horizontal movement of goods through electric driving.

[0039] The beneficial effects of the above technical scheme are that the cantilever hoisting mechanism is directly installed on the force standard machine stand, without the need of additionally configuring a factory crane system, the hoisting function is integrated into the equipment body, the problem of relying on external hoisting equipment in the traditional scheme is solved, the requirements for the installation site height, the crane track and other infrastructures are significantly reduced, and the cantilever can rotate around the stand in a large angle range, the horizontal movement of the electric hoist in the guide rail groove is matched, the hoisting range covers the surrounding area of the mainframe, and the operator can control the electric hoist on the ground to directly hoist the hundreds-of-kilogram-level large force value sensor from the ground to the sensor automatic displacement mechanism on the moving cross beam, so that the path limitation of the traditional manual carrying is avoided.

[0040] In other embodiments of the utility model, the bearings 825 between the upper and lower ends of the rotating shaft 821 and the upper fixed plate 811 and the lower fixed plate 812 adopt tapered roller bearings. The beneficial effects of the above technical scheme are that the tapered roller bearings bear axial and radial forces at the same time, and ensure the stable rotation of the rotating arm assembly under heavy load.

[0041] In other embodiments of the utility model, the upper end of the reinforcing connecting arm 824 and the upper part of the rotating drum 822 are connected through welding. The lower end of the reinforcing connecting arm 824 and the upper part of the cantilever arm 823 are connected through welding. The beneficial effects of the above technical scheme are that the reinforcing connecting arm, the rotating drum and the cantilever arm form a triangular rigid frame through welding, and the hoisting load capacity is improved.

[0042] One embodiment of the utility model is that a force standard machine comprises:

[0043] A main frame 10, which comprises a base 11, a middle platform 12 and a plurality of columns 13, the columns 13 are vertically fixedly installed on the base 11, and the middle platform 12 is fixedly installed on the top end of the columns 13;

[0044] A force applying mechanism 20, which is installed on the middle platform 12 of the main frame 10;

[0045] A counterforce frame 30, which comprises a top beam 31, a moving beam 32 and two lead screws 33, the lower surface of the top beam 31 is pressed against the force applying mechanism 20 through a spherical pressure head, the lead screws 33 are downwardly extended from the top beam 31, the moving beam 32 is installed on the lead screws 33, and a driving mechanism for driving the moving beam 32 to move up and down along the lead screws 33 is further installed on the moving beam 32;

[0046] A sensor automatic displacement mechanism 40, which is installed on one side of the moving beam 32, and is used for moving the measured sensor from the side of the main frame 10 to the middle test position of the moving beam 32; the specific structure of the sensor automatic displacement mechanism 40 is not limited in the present application and can be obtained from the prior art; generally, the sensor automatic displacement mechanism 40 comprises a supporting mechanism, a lifting mechanism and a translation mechanism, the supporting mechanism is used for placing the measured sensor, the lifting mechanism is used for driving the supporting mechanism to move up and down to ensure that the supporting mechanism can avoid the test station pressing table on the moving beam during translation, and the translation mechanism is used for driving the supporting mechanism and the lifting mechanism to move to the test station;

[0047] The cantilever lifting mechanism described above is installed on one of the columns 13 of the main frame.

[0048] The beneficial effects of the above technical solution are that the electric hoist lifts the sensor from the ground to the displacement mechanism on one side of the moving beam, and the displacement mechanism automatically pushes the sensor to the center test position, which is convenient for the installation of the measured sensor, less manual intervention, and improves the detection efficiency.

[0049] As Figures 1-4As shown in the utility model, in still other embodiments of the utility model, the anti-deviation mechanism of the counterforce frame comprises two support modules 60, the support modules 60 are installed on the upper surface of the moving cross beam 32 of the counterforce frame 30 of the force standard machine, and the two support modules 60 are respectively close to the two vertical columns 13 of the main frame of the force standard machine far from the loading position of the measured sensor; the support module 60 comprises a fixed frame 61, a guide rod 62, a push plate 63, a buffer pad 64 and a push driving mechanism 65, the fixed frame 61 comprises a fixedly connected bottom plate 611 and a vertical plate 612, the vertical plate 612 is vertically arranged with the bottom plate 611, the bottom plate 611 is fixedly installed on the upper surface of the moving cross beam 32, the two ends of the push plate 63 are respectively provided with a horizontally arranged guide rod 62, the guide rod 62 is movably installed on the vertical plate 612 through a guide sleeve, the buffer pad 64 is fixedly installed on the front side of the push plate 63, and the push driving mechanism 65 is used to drive the push plate 63 to move towards the direction close to or far from the vertical column 13.

[0050] The beneficial effects of the above technical scheme are that: through the cooperation of the two support modules and the two vertical columns of the main frame far from the loading position, when the measured sensor is placed on one side of the displacement mechanism, the push driving mechanism drives the push plate to make the buffer pad abut against the vertical column, rigid support in the horizontal direction is formed, lateral deviation of the counterforce frame caused by uneven stress is offset, the vertical state of the counterforce frame is ensured, the stability during the loading and centering displacement of the measured sensor is improved, and therefore the accuracy of the detection data of the force sensor is improved. The buffer pad at the front end of the push plate is made of elastic material, can absorb slight vibration of the counterforce frame when abutting against the vertical column, reduces the impact caused by rigid contact, protects the surface of the vertical column and the parts of the counterforce frame, and prolongs the service life of the equipment.

[0051] As shown in the utility model, Figure 3 As shown in the utility model, in still other embodiments of the utility model, the push driving mechanism 65 comprises a worm gear reducer 651, a motor base 652 and a driving motor 653, the worm gear reducer 651 is fixedly installed on the fixed frame 61, the output shaft of the worm gear reducer 651 is connected with the push plate 63, the motor base 652 is also fixedly installed on the worm gear reducer 651, the driving motor 653 is installed on the motor base 652, and the output shaft of the driving motor 653 is in transmission connection with the input shaft of the worm gear reducer 651 through a shaft coupling. The beneficial effects of the above technical scheme are that: the push driving mechanism is combined with the driving motor through the worm gear reducer, the self-locking characteristic of the worm gear is utilized, fixed supporting force can be kept after the buffer pad abuts against the vertical column, and the counterforce frame is prevented from rebounding.

[0052] As shown in the utility model, Figure 3As shown in the utility model in some other embodiments, the fixed frame 61 is further provided with a rib plate 613, and the rib plate 613 is vertically arranged with the bottom plate 611 and the vertical plate 612. The beneficial effect of the above technical scheme is that the rib plate of the fixed frame enhances the connecting strength of the bottom plate and the vertical plate, and avoids structural deformation caused by long-term thrust stress.

[0053] As shown in the utility model in some other embodiments, the fixed frame 61 is further provided with a rib plate 613, and the rib plate 613 is vertically arranged with the bottom plate 611 and the vertical plate 612. The beneficial effect of the above technical scheme is that the rib plate of the fixed frame enhances the connecting strength of the bottom plate and the vertical plate, and avoids structural deformation caused by long-term thrust stress. Figure 4 As shown in the utility model in some other embodiments, the fixed frame 61 is further provided with a rib plate 613, and the rib plate 613 is vertically arranged with the bottom plate 611 and the vertical plate 612. The beneficial effect of the above technical scheme is that the rib plate of the fixed frame enhances the connecting strength of the bottom plate and the vertical plate, and avoids structural deformation caused by long-term thrust stress.

[0054] As shown in the utility model in some other embodiments, the fixed frame 61 is further provided with a rib plate 613, and the rib plate 613 is vertically arranged with the bottom plate 611 and the vertical plate 612. The beneficial effect of the above technical scheme is that the rib plate of the fixed frame enhances the connecting strength of the bottom plate and the vertical plate, and avoids structural deformation caused by long-term thrust stress. Figure 1 and Figure 2 As shown in the utility model in some other embodiments, the horizontal block 71 is arranged above the middle platform 12 at the upper portion of the screw rod 33 of the counterforce frame, and the two top rods 72 are arranged on the two sides of the screw rod and extend downward, and the two top rods 72 on each horizontal block 71 are distributed along the width direction of the top beam 31; after the pressure of the force applying mechanism 20 is released, the lower end surface of the top rod 72 abuts against the surface of the middle platform 12; after the counterforce frame 30 is lifted by the pressure of the force applying mechanism 20, the lower end surface of the top rod 72 is separated from the surface of the middle platform 12. The beneficial effect of the above technical scheme is that the horizontal block and the top rod arranged at the upper portion of the screw rod of the counterforce frame automatically abut against the middle platform after the pressure of the force applying mechanism is released, mechanical support is formed, and the counterforce frame is prevented from suddenly falling and impacting the displacement mechanism or the sensor due to gravity; the top rod automatically separates from the middle platform when the force applying mechanism is pressurized, and the normal lifting of the counterforce frame is not affected, the structure guarantees the safety of the equipment during shutdown, and the working efficiency is improved.

[0055] The above embodiments are only for illustrating the technical concept and characteristics of the utility model, the purpose is to enable those skilled in the art to understand the content of the utility model and implement it, and cannot limit the protection scope of the utility model, and equivalent changes or modifications according to the spirit and essence of the utility model should be covered in the protection scope of the utility model.

Claims

1. A cantilevered hoisting mechanism, characterized by, It comprises: a fixed frame, which comprises an upper fixed plate, a lower fixed plate and a pull rod, one end of the upper fixed plate is fixedly installed on the top end of the force standard machine column, one end of the lower fixed plate is fixedly installed on the outer periphery of the column below the middle platform of the force standard machine main frame, and the upper and lower ends of the pull rod are connected to the upper fixed plate and the lower fixed plate respectively; a rotating arm assembly, which comprises a rotating shaft, a rotating drum, a cantilever and a reinforcing connecting arm, the upper end of the rotating shaft is rotatably installed on the other end of the upper fixed plate through a bearing, the lower end of the rotating shaft is rotatably installed on the other end of the lower fixed plate through a bearing, the upper and lower ends of the rotating drum are welded to the upper and lower ends of the rotating shaft through a connecting ring body, the rotating drum is coaxially arranged with the rotating shaft, one end of the cantilever is welded to the lower part of the outer periphery of the rotating drum, and the reinforcing connecting arm is connected between the rotating drum and the cantilever in an inclined manner, and the cantilever is provided with a horizontally arranged guide rail groove; an electric hoist, the walking roller at the upper end of which is installed in the guide rail groove of the cantilever.

2. The cantilever hoisting mechanism according to claim 1, characterized in that, The bearings between the upper and lower ends of the rotating shaft and the upper fixed plate and the lower fixed plate adopt tapered roller bearings.

3. The cantilever hoisting mechanism according to claim 1, characterized in that, The upper end of the reinforcing connecting arm is connected to the upper part of the rotating drum through welding.

4. The cantilevered hoisting mechanism of claim 3, wherein, The lower end of the reinforcing connecting arm is connected to the upper part of the cantilever through welding.

5. Force standard machine, characterized in that, It comprises: a main frame, which comprises a base, a middle platform and a plurality of columns, the columns are vertically fixedly installed on the base, and the middle platform is fixedly installed on the top end of the columns; a force applying mechanism, which is installed on the middle platform of the main frame; a counter-force frame, which comprises a top beam, a moving cross beam and two lead screws, the lower surface of the top beam is pressed against the force applying mechanism through a spherical pressure head, the lead screws are arranged in a downward extending manner from the top beam, the moving cross beam is installed on the lead screws, and a driving mechanism for driving the moving cross beam to move up and down along the lead screws is further installed on the moving cross beam; a sensor automatic displacement mechanism, which is installed on one side of the moving cross beam, and is used for moving the measured sensor from one side of the main frame to the middle test position of the moving cross beam; The cantilever hoisting mechanism according to any one of claims 1-4 is installed on one column of the main frame.

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