Transportation device of portable machine tool

Abstract

The invention discloses a portable machine tool transportation device, and belongs to the technical field of machine tool transportation, and the portable machine tool transportation device comprises a mounting frame used for mounting a machine tool; the transporting device is arranged below the mounting frame and is used for transporting the machine tool; the transporting device comprises a supporting base and a supporting wheel set arranged below the supporting base; the supporting wheel set comprises a traction trolley and a supporting trolley, and the traction trolley comprises a driving wheel and a driving device; the supporting trolley comprises a driven wheel; the machine tool is placed on the traction trolley and the supporting trolley; the driving device controls the driving wheels to rotate so as to achieve movement of the conveying device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of machine tool transportation, in particular to a portable machine tool transportation device. BACKGROUND

[0002] The portable machine tool transportation device is usually transported by traction and other methods. With the continuous development of the transportation device, heavy loads for transporting heavy engineering equipment have appeared in some heavy industrial fields, such as the transportation of machine tool bases in automatic assembly of machine tools.

[0003] However, the existing transportation device for transporting machine tools needs to prepare a vehicle body when transporting the machine tool, and then the machine tool is placed on the vehicle body for transportation. However, the vehicle body is large and the use and maintenance are relatively cumbersome. SUMMARY

[0004] In view of the problems in the prior art, the purpose of the present application is to provide a portable machine tool transportation device which can automatically adjust the counterweight of the transportation device to improve the stability and smoothness of transportation.

[0005] To solve the above problems, the present application adopts the following technical solutions.

[0006] A portable machine tool transportation device includes a mounting frame for mounting a machine tool, a transportation device arranged below the mounting frame for transporting the machine tool, and a transportation device including a support base and a support wheel set arranged below the support base; the support wheel set includes a traction trolley and a support trolley, the traction trolley includes a driving wheel and a driving device; the support trolley includes a driven wheel; the machine tool is placed on the traction trolley and the support trolley; the driving device controls the rotation of the driving wheel to realize the movement of the transportation device.

[0007] Further, at least one movable slot is provided on the support base, and a liftable support assembly is arranged in the movable slot; a balancing device is arranged on the support assembly for detecting the center of gravity deviation of the machine tool; a counterweight bin is arranged on one side of the support base for storing counterweight medium; the balancing device is in communication connection with the counterweight bin to control the delivery or discharge of the counterweight medium into the support assembly according to the center of gravity deviation; the support assembly includes a support plate and an antiskid support plate arranged thereon; at least one counterweight cavity is arranged in the support plate, and the counterweight cavity is in communication with the counterweight bin through a counterweight inlet.

[0008] Further, the counterweight inlet includes a first counterweight inlet and a second counterweight inlet arranged on the two sides of the support plate respectively; the counterweight cavity is in communication with the counterweight inlet and is in backflow connection with the counterweight bin through a counterweight outlet.

[0009] Further, the balancing device comprises a housing, a first trigger mechanism and a second trigger mechanism arranged at two ends of the housing, and a balancing medium arranged between the two trigger mechanisms; the balancing medium triggers the first trigger mechanism or the second trigger mechanism when the center of gravity deviates.

[0010] 5. The portable machine tool transportation device according to claim 4, wherein the balancing medium is a conductive fluid, and the first trigger mechanism and the second trigger mechanism are metal contacts; the conductive fluid conducts the metal contacts when tilted to form an electrical signal path.

[0011] Further, the balancing medium is a sliding magnet, and the first trigger mechanism and the second trigger mechanism are electromagnets; the electromagnets attract the sliding magnet when powered on to trigger the sensor to generate a control signal.

[0012] Further, the counterweight bin is provided with a first counterweight outlet and a second counterweight outlet, which are respectively connected to the counterweight inlets of the support assembly through electromagnetic valves; the electromagnetic valves are controlled to open and close by the control signal of the balancing device.

[0013] Further, a telescopic mechanism is arranged below the support assembly to drive the support assembly to ascend and descend; the telescopic mechanism comprises outer support rods and inner support rods arranged in a cross shape, and hydraulic rods and rotary driving devices for driving the movement of the outer support rods and the inner support rods.

[0014] Further, the outer support rods and the inner support rods are respectively provided with outer pulleys and inner pulleys, which slide in the sliding grooves in the movable grooves.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] By supporting or placing the machine tool by the traction trolley and the support trolley, the originally large and complicated vehicle body is divided into the traction trolley and the support trolley, so that the use and maintenance are more portable. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a perspective structural schematic view of the present application;

[0018] Figure 2 is a plane structural schematic view of the bottom surface of the present application;

[0019] Figure 3 is a perspective structural schematic view of the transportation device of the present application;

[0020] Figure 4 is a front plane structural schematic view of the transportation device of the present application;

[0021] Figure 5 is a front sectional structural schematic view of the transportation device of the present application;

[0022] Figure 6An enlarged structural schematic view of the place A in the present application Figure 5 An enlarged structural schematic view of the place A in the present application

[0023] Figure 7 An enlarged structural schematic view of the place A in the present application

[0024] Figure 8 An enlarged structural schematic view of the place A in the present application

[0025] Figure 9 An enlarged structural schematic view of the place A in the present application Figure 8 An enlarged structural schematic view of the place A in the present application

[0026] Figure 10 An enlarged structural schematic view of the place A in the present application

[0027] Figure 11 An enlarged structural schematic view of the place A in the present application

[0028] Figure 12 An enlarged structural schematic view of the place A in the present application

[0029] Explanation of the figure mark:

[0030] 1, mounting frame; 11, mounting groove;

[0031] 2, machine tool;

[0032] 3, transport device; 31, support wheel group; 311, rotating plate; 312, limiting clamp; 313, driving wheel; 314, driving device; 315, driven universal wheel; 32, support base; 321, movable groove; 322, support seat; 323, counterweight connecting port; 323-1, first counterweight connecting valve; 323-2, second counterweight connecting valve; 33, support assembly; 331, support plate; 331-1, first counterweight inlet; 331-2, second counterweight inlet; 331-3, counterweight outlet; 331-4, counterweight cavity; 332, anti-skid support plate; 34, balancing device; 341, first trigger mechanism; 341-1, first sensor; 342, second trigger mechanism; 342-1, second sensor; 343, balancing medium; 35, counterweight bin; 351, first counterweight outlet; 351-1, first electromagnetic valve; 351-2, second electromagnetic valve; 352, second counterweight outlet; 352-1, third electromagnetic valve; 352-2, fourth electromagnetic valve; 353, counterweight bin inlet; 36, telescopic mechanism; 361, outer support rod; 361-1, outer pulley; 361-2, outer protrusion; 361-3, fixed movable end; 362, inner support rod; 362-1, inner pulley; 362-2, inner protrusion; 362-3, rotating gear; 362-4, rotating drive; 363, fixed shaft rod; 364, hydraulic rod; sliding groove 365. Detailed Implementation

[0033] Example 1:

[0034] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0035] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0036] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0037] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0038] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] Reference Figures 1-10 ,

[0040] A portable machine tool transport device includes a mounting frame 1, a machine tool 2, and a transport device 3. The machine tool 2 is mounted on the mounting frame 1, and the machine tool 2 is engaged with the mounting frame 1. The transport device 3 has the capability of movement and transport, allowing the machine tool 2 on the mounting frame 1 to be transported.

[0041] The support wheel assembly includes a traction trolley and a support trolley. The traction trolley includes a drive wheel and a drive device. The support trolley includes a driven wheel. The machine tool is placed on the traction trolley and the support trolley. The drive device controls the rotation of the drive wheel to realize the movement of the transport device.

[0042] Specifically, mounting slots 11 are provided on the inner sides of the mounting frame 1, and mounting slots 11 on the two inner sides of the mounting frame 1 form mounting cavities so that the machine tool 2 can be fitted into the mounting cavities.

[0043] Specifically, the support trolley and the traction trolley can be fixed together or be an integral whole. The transport device 3 comprises a support wheel set 31 and a support base 32, and the support wheel set 31 is installed at the lower end of the support base 32. The support wheel set 31 comprises a base shell, a rotating plate 311, a limiting clamp 312, a driving wheel 313, a driving device 314 and a driven universal wheel 315. The lower end of the base shell is provided with a cavity, and the rotating plate 311 is rotationally connected with the inner wall of the cavity of the base shell. The limiting clamp 312 is installed at the middle lower end of the rotating plate 311 and is fixedly connected with the rotating plate 311. The driving wheel 313 is installed between the limiting clamps 312 and is rotationally connected with the limiting clamps 312. The driving device 314 is installed outside the limiting clamps 312, and the output end of the driving device 314 is electrically connected with the driving wheel 313, so as to control the rotation of the driving wheel 313 through the driving device 314. A plurality of driving wheels 313 are installed, and the plurality of driving wheels 313 are arranged in the middle of the cavity of the base shell. The driven universal wheels 315 are installed on both sides of the driving wheel 313 and are rotationally connected with the inner wall of the base shell.

[0044] The machine tool is supported or placed by the traction trolley and the support trolley at the same time, the originally larger and cumbersome vehicle body is divided into the traction trolley and the support trolley, and the use and maintenance are more portable.

[0045] Specifically, a plurality of movable grooves 321 are arranged on the upper end surface of the support base 32, and in this embodiment, three movable grooves 321 are equidistantly arranged. Support seats 322 are arranged on both sides of the support base 32, and the support seats 322 are used to provide support when the machine tool is pressed downward. The side wall end of the movable groove 321 is provided with a counterweight connecting port 323, and the counterweight connecting port 323 is arranged at least on both sides of the movable groove 321. In this embodiment, the counterweight connecting ports 323 are arranged at both ends of the support base 32, and the counterweight connecting ports 323 are arranged on both sides of the support base 32. The counterweight connecting port 323 comprises an inlet and an outlet, and the outlet end of the counterweight connecting port 323 is further provided with a first counterweight connecting valve 323-1 and a second counterweight connecting valve 323-2. The movable groove 321 in the support base 32 is further provided with a corresponding support assembly 33, and the two sides of the support assembly 33 are respectively provided with a balancing device 34, so as to adjust the uneven force of the machine tool on the support assembly 33 through the balancing device. One side of the support assembly 33 is further provided with a corresponding counterweight bin 35, so as to send a counterweight request to the counterweight bin 35 through the balancing device 34 and transport the counterweight medium into the support assembly 33. In this embodiment, the counterweight medium is heavy suspension liquid. The lower end of the support assembly 33 is provided with a telescopic mechanism 36 that can be lifted, so as to drive and control the support assembly 33 to support the machine tool and place it on the support base 32 for transportation through the telescopic mechanism 36.

[0046] Specifically, the support assembly 33 includes a support plate 331 and an anti-skid support plate 332, the support plate 331 is installed at the lower end of the anti-skid support plate 332, and the anti-skid support plate 332 is symmetrically arranged along the middle part on the support plate 331. The two sides of the support plate 331 are symmetrically provided with a pair of counterweight inlets, and the pair of counterweight inlets respectively includes a first counterweight inlet 331-1 and a second counterweight inlet 331-2. A plurality of counterweight outlets 331-3 are formed at the lower end of the support plate 331, and a plurality of counterweight cavities 331-4 are formed on the end face of the support plate 331. In this embodiment, the counterweight cavities 331-4 are four, and the four counterweight cavities 331-4 are all located at the lower end of the anti-skid support plate 332, and the counterweight inlets on the opposite sides are respectively communicated with the two counterweight cavities 331-4 on the same side, so as to control the counterweight switch in the two counterweight cavities 331-4 on the same side through the first counterweight inlet 331-1 and the second counterweight inlet 331-2 on the same side. Among them, the plurality of counterweight cavities 331-4 can be arranged to cope with complex gravity distribution, and are suitable for different types of machine tools. The counterweight outlets 331-3 are respectively communicated with the plurality of counterweight cavities 331-4, so as to discharge the counterweight medium outward through the pipeline.

[0047] Specifically, the balancing device 34 is installed on both sides of the anti-skid support plate 332, and the balancing device 34 is installed on the adjacent end edge of the counterweight inlet. It should be noted that the balancing device 34 is horizontally arranged, and the horizontal direction of the balancing device 34 is from one pair of counterweight inlets to the other pair of counterweight inlets. Referring to Figure 7 The horizontal line from top to bottom is the balance limit of the balancing device 34. The balancing device 34 includes a housing, a first trigger mechanism 341 and a second trigger mechanism 342 installed at both ends in the housing, and a balancing medium 343. In this embodiment, the first trigger mechanism 341 and the second trigger mechanism 342 are metal contacts disconnected at the upper and lower ends of the housing, the balancing medium 343 is a conductive fluid, and the conductive fluid covers the metal contacts below the two ends in the balanced state, so that the two opposite metal contacts of the first trigger mechanism 341 or the second trigger mechanism 342 cannot be connected. When the balancing device 34 is deviated, the conductive fluid will tilt to the side with more gravity, so that the metal contacts at the upper and lower ends of the low tilt point are conductively connected to each other. In this embodiment, the conductive fluid is used as the balancing medium, which can improve the response without mechanical delay, is suitable for high-frequency fine adjustment, and improves the dynamic balancing ability.

[0048] Specifically, the counterweight bin 35 is installed on one side of the support assembly 33, and the output end of the counterweight bin 35 is connected with the counterweight connecting port 323 of the side end. The two sides of the counterweight bin 35 are respectively provided with a first counterweight outlet 351 and a second counterweight outlet 352, the output end of the first counterweight outlet 351 is respectively provided with a corresponding first electromagnetic valve 351-1 and a second electromagnetic valve 351-2, and the output end of the second counterweight outlet 352 is respectively provided with a corresponding third electromagnetic valve 352-1 and a fourth electromagnetic valve 352-2. In the embodiment, since the movable groove 321 is provided with three, the support assembly 33 is correspondingly provided with three, and the counterweight bin 35 is respectively arranged between two support assemblies 33, and only two are arranged. Therefore, the counterweight connecting port 323 is needed to be arranged to communicate the first electromagnetic valve 351-1 on one side with each other. The lower end of the counterweight connecting port 323 is respectively provided with a first counterweight connecting valve 323-1 and a second counterweight connecting valve 323-2, the first counterweight connecting valve 323-1 is connected with the first counterweight inlet 331-1 on the same side, and the first counterweight connecting valve 323-1 on the other side is also connected with the first counterweight inlet 331-1 on the same side, so as to respectively control two counterweight cavities 331-4 on the horizontal line. It should be noted that if there is a single movable groove 321, the first electromagnetic valve 351-1 is communicated with the first counterweight inlet 331-1 on the same side, the third electromagnetic valve 352-1 is also communicated with the first counterweight inlet 331-1 on the same side, and the two first counterweight inlets 331-1 are respectively communicated with different counterweight cavities 331-4 on the same horizontal line. Similarly, the second electromagnetic valve 351-2 is communicated with the second counterweight inlet 331-2 on the same side, and the fourth electromagnetic valve 352-2 is also communicated with the second counterweight inlet 331-2 on the same side. When the balance device 34 is balanced and inclined, the first trigger mechanism 341 is communicated, the first trigger mechanism 341 causes the passage to open the first electromagnetic valve 351-1 to pass the counterweight medium into the high side of the balanced and inclined end. It should be noted that the counterweight cavities 331-4 communicated with the first electromagnetic valve 351-1 or the third electromagnetic valve 352-1 by the first trigger mechanism 341 or the second trigger mechanism 342 are cross arranged to realize balance adjustment. The second electromagnetic valve 351-2 or the fourth electromagnetic valve 352-2 on the other side is arranged on the balance device 34 installed on the anti-skid support plate 332 in the same way. The lower end of the counterweight bin 35 is also respectively provided with a counterweight bin inlet 353 on both sides, and the counterweight bin inlet 353 is respectively connected with the counterweight outlet 331-3, so as to recycle and reuse the output counterweight medium through the counterweight outlet 331-3.

[0049] Specifically, the telescopic mechanism 36 includes two pairs of outer support rods 361 and inner support rods 362 arranged in cross with each other, the outer support rods 361 and the inner support rods 362 are arranged in cross with each other along the middle part and are rotationally connected. The two pairs of cross-arranged outer support rods 361 and inner support rods 362 are arranged on both sides of the lower end of the support plate 331, and the outer support rods 361 are rotationally fixedly connected with the lower end of the support plate 331, and the inner support rods 362 are limitingly and slidably connected with the lower end of the support plate 331. The lower end of the outer support rod 361 is provided with an outer pulley 361-1, and the outer pulley 361-1 is slidably connected with the lower end of the movable groove 321, and the lower end of the outer support rod 361 is provided with an outer protrusion 361-2, and the outer protrusion 361-2 is located at the upper end of the outer pulley 361-1. The end of the outer support rod 361 close to the support plate 331 is provided with a fixed movable end 361-3, and the fixed movable end 361-3 is rotationally connected with the support plate 331. The upper end of the inner support rod 361 is provided with an inner pulley 362-1, and the inner pulley 362-1 is slidably connected with the lower end of the support plate 331, and the upper end of the inner support rod 362 is provided with an inner protrusion 362-2, and the inner protrusion 362-2 is located at the lower end of the inner pulley 362-1. The lower end of the inner support rod 362 is provided with a rotating gear 362-3, and the outer side of the rotating gear 362-3 is connected with a rotating drive 362-4, and the output end of the rotating drive 362-4 is fixedly connected with the rotating gear 362-3, so as to control the rotation of the rotating gear 362-3 through the rotating drive 362-4. The lower end of the rotating gear 362-3 is correspondingly provided with a movable tooth, so as to drive the outer support rod 361 and the inner support rod 362 to be folded along the middle part through the movable tooth assisting the rotating gear 362-3. Wherein, corresponding fixed shaft rods 363 are arranged on the opposite outer protrusions 361-2, and corresponding shaft rods are also arranged on the opposite inner protrusions 362-2, and hydraulic rods 364 are connected between the fixed shaft rods 363 and the shaft rods, so as to control the distance between the outer support rod 361 and the inner support rod 362 on the same side to realize the up-down movement of the support plate 331. The outer pulley 361-1 and the inner pulley 362-1 are correspondingly provided with sliding grooves 365, and the sliding grooves 362 are closed on both sides to limit the position of the sliding of the outer support rod 361 and the inner support rod 362.

[0050] Working principle:

[0051] When the center of gravity of the machine tool deviates during transportation, the conductive fluid in the balancing device flows to one side due to the inclination, and the metal contact (first trigger mechanism or second trigger mechanism) on the side is turned on, forming an electrical signal path, thereby controlling the corresponding electromagnetic valve (such as the first electromagnetic valve or the third electromagnetic valve) to open, so that the heavy suspension liquid in the counterweight bin flows into the counterweight cavity in the support plate through the counterweight inlet, increasing the counterweight on the side to restore the balance; at the same time, the telescopic mechanism adjusts the height of the support assembly through the hydraulic rod and the rotating drive device, further assisting the stable transportation.

[0052] Embodiment 2:

[0053] Referring to Figures 11-12 ,

[0054] A portable machine tool transportation device, different from embodiment 1, the first trigger mechanism 341 and the second trigger mechanism 342 are electromagnets with magnetic heterogeneity respectively, and the electromagnets are made of non-magnetic materials, so that the electromagnets have no any magnetism when they are powered off. The balancing medium 343 is a sliding magnet, and a wear-resistant layer is arranged on the surface of the sliding magnet to prevent the magnetic property of the sliding magnet from being reduced due to long-term sliding. The magnetic properties of the sliding magnet at both ends are different from the magnetic properties of the opposite ends close to the first trigger mechanism 341 or the second trigger mechanism 342, so that the first trigger mechanism 341 or the second trigger mechanism 342 attracts the sliding magnet after being powered on. The shell of the balancing device 4 is made of magnetic isolation material. The first trigger mechanism 341 is provided with a first sensor 341-1 at the front end, and the second trigger mechanism 342 is provided with a second sensor 342-1 at the front end. The first sensor 341-1 is used to control the first electromagnetic valve 351-1 or the third electromagnetic valve 352-1 to be started, and the second sensor 342-1 is used to control the second electromagnetic valve 351-2 or the fourth electromagnetic valve 352-2 to be started. It should be noted that the balancing device 34 is arranged on the horizontal side of the corresponding two anti-skid support plates 332, and a single balancing device 34 controls the counterweight cavity 331-4 at the lower end of a single anti-skid support plate 332. In this embodiment, the magnetic control system has no risk of liquid leakage, and is more suitable for occasions with higher cleanliness requirements. Moreover, the electromagnet can adjust the magnetic force through the current intensity, realize counterweight response in different degrees, and has high flexibility.

[0055] Working principle:

[0056] When the gravity center deviates, the sliding magnet slides in the shell as a balancing medium, and the electromagnet (the first trigger mechanism or the second trigger mechanism) close to one side is powered on to generate a heteropolar magnet to attract the sliding magnet, a trigger sensor (such as the first sensor or the second sensor) generates a control signal, and then controls the corresponding electromagnetic valve to be opened, so that the counterweight medium is injected into the counterweight cavity, dynamic counterweight adjustment is realized, and the transportation stability is improved.

[0057] The above description is only some of the preferred embodiments of the present disclosure and the explanation of the technical principles applied. Those skilled in the art should understand that the scope of the application involved in the embodiments of the present disclosure is not limited to the technical solutions formed by the specific combinations of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or equivalent features without departing from the above inventive concept. For example, the above features are replaced with the technical features disclosed in the embodiments of the present disclosure (but not limited to) having similar functions to form technical solutions.

Claims

1. A transport device for portable machine tools, characterized in that: The machine tool comprises a mounting frame, a transport device arranged below the mounting frame, and a transport device comprising a support base and a support wheel set arranged below the support base. The support wheel set comprises a traction trolley and a support trolley, the traction trolley comprising a driving wheel and a driving device. The support trolley comprises a driven wheel, and the machine tool is placed on the traction trolley and the support trolley. The driving device controls the rotation of the driving wheel to realize the movement of the transport device. The support base is provided with at least one movable slot, and a liftable support assembly is arranged in the movable slot. A balancing device is arranged on the support assembly and is used to detect the gravity center deviation of the machine tool. A counterweight bin is arranged on one side of the support base and is used to store counterweight medium. The balancing device is in communication connection with the counterweight bin, so as to control the delivery or discharge of the counterweight medium into the support assembly according to the gravity center deviation.

2. A portable machine tool transport according to claim 1, characterised in that: The support assembly comprises a support plate and an antiskid support plate arranged thereon. The support plate is provided with at least one counterweight cavity, and the counterweight cavity is in communication connection with the counterweight bin through a counterweight inlet. The counterweight inlet comprises a first counterweight inlet and a second counterweight inlet arranged on both sides of the support plate respectively. The counterweight cavity is in communication connection with the counterweight inlet and is in backflow connection with the counterweight bin through a counterweight outlet. The balancing device comprises a shell, a first trigger mechanism and a second trigger mechanism arranged at both ends of the shell, and a balancing medium arranged between the first trigger mechanism and the second trigger mechanism.

3. A portable machine tool transport according to claim 2, characterised in that: The balancing medium triggers the first trigger mechanism or the second trigger mechanism when the gravity center deviates.

4. A portable machine tool transport according to claim 2, characterised in that: The balancing medium is a conductive fluid, and the first trigger mechanism and the second trigger mechanism are metal contacts.

5. A portable machine tool transport according to claim 4, characterised in that: The conductive fluid conducts the metal contacts when it is inclined, forming an electrical signal path.

6. A portable machine tool transport according to claim 4, characterised in that: The balancing medium is a sliding magnet, and the first trigger mechanism and the second trigger mechanism are electromagnets.

7. A portable machine tool transport according to claim 2, characterized in that: The electromagnets attract the sliding magnet after being electrified, triggering the sensor to generate a control signal.

8. A portable machine tool transport according to claim 2, characterized in that: The counterweight bin is provided with a first counterweight outlet and a second counterweight outlet, which are connected with the counterweight inlets of the support assembly through electromagnetic valves respectively.

9. A portable machine tool transport according to claim 8, characterised in that: The electromagnetic valves are controlled to open and close by the control signal of the balancing device. A telescopic mechanism is arranged below the support assembly and is used to drive the support assembly to lift and lower. The telescopic mechanism comprises outer support rods and inner support rods arranged in cross, and hydraulic rods and rotary driving devices driving the movement of the outer support rods and the inner support rods. The outer support rods and the inner support rods are respectively provided with outer pulleys and inner pulleys, which are matched with sliding grooves in the movable slot to slide.

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