CN216410116U - Displacement measurement device for portal, portal and engineering machinery - Google Patents

Abstract

The application relates to the technical field of safe operation of engineering machinery, in particular to a displacement measuring device for a portal, the portal and the engineering machinery. The door frame comprises an inner door frame and an outer door frame, and the outer door frame is connected with the inner door frame in a sliding manner; displacement measurement device for portal includes: the rotating piece is rotatably connected to the outer door frame and is in rolling connection with the inner door frame; the detection assembly is arranged on the outer door frame and is opposite to the rotating piece so as to detect the rotation of the rotating piece and acquire rotation data; and a processor, which is in communication connection with the detection assembly and is configured to generate displacement information of the inner gantry according to the rotation data. The linkage is generated between the rotating part and the inner door frame, and then the rotating part is detected, so that the sliding height of the inner door frame is detected, and the accuracy of a detection result is effectively improved.

Description

Displacement measurement device for portal, portal and engineering machinery

Technical Field

The application relates to the technical field of safe operation of engineering machinery, in particular to a displacement measuring device for a portal, the portal and the engineering machinery.

Background

The portal is a component of stacking equipment, is mainly used for stacking or stacking objects, and has wide application in workshops and various construction sites.

In the prior art, when the portal frame runs, the moving height of the portal frame needs to be acquired in real time, so that the stacking position of an object is determined, a steel wire disc, a steel wire rope and a stay wire sensor are arranged on the portal frame, when the portal frame rises, the steel wire rope moves, the stay wire sensor detects the steel wire rope, and the rising distance of the portal frame is determined by detecting the moving distance of the steel wire rope.

However, in the above measurement process, the steel wire rope is easily deformed due to pulling during operation, which may cause deviation of the height detected by the pull sensor.

SUMMERY OF THE UTILITY MODEL

In view of this, the application provides a displacement measurement device, portal and engineering machine for portal, has solved or has improved the lower problem of portal lift distance measurement accuracy.

In a first aspect, the displacement measuring device for the gantry comprises an inner gantry and an outer gantry, wherein the outer gantry is connected with the inner gantry in a sliding manner; the displacement measurement device for portal includes: the rotating piece is rotatably connected to the outer door frame and is in rolling connection with the inner door frame; the detection assembly is arranged on the outer door frame and is opposite to the rotating piece so as to detect the rotation of the rotating piece and acquire rotation data; and a processor in communication with the detection assembly, the processor configured to generate displacement information for the inner gantry based on the rotation data.

The utility model provides a displacement measurement device for portal that this application first aspect provided, when interior portal slides for outer portal, rotate the piece and can take place to rotate along with the slip of interior portal, the detection subassembly then real-time detection rotates the rotation of piece and acquires rotation data, the treater is then to rotating data and handling, because the rotation of rotating the piece is gone on with the slip synchronization of interior portal, consequently through handling rotation data, just can obtain the displacement information of interior portal. The linkage is generated between the rotating part and the inner door frame, and then the rotating part is detected, so that the sliding height of the inner door frame is detected, and the accuracy of a detection result is effectively improved.

With reference to the first aspect, in one possible implementation manner, the displacement measuring device for a gantry includes: the signal ring is arranged on the side face of the rotating part and provided with a signal notch, the signal ring and the detection assembly are arranged oppositely, and the detection assembly is configured to sequentially detect the signal ring and the signal notch to acquire the rotating data.

With reference to the first aspect, in a possible implementation manner, the detecting component includes: the first detector is fixed on the outer gantry and provided with a first detection end, and the first detection end is arranged towards the signal ring to acquire the rotation data; the processor is in communication connection with the first detection end to acquire the number of rotation turns according to the rotation data, and generates the displacement information according to the number of rotation turns.

With reference to the first aspect, in a possible implementation manner, the detecting component further includes: the second detector is fixed on the outer gantry and provided with a second detection end, the second detection end faces the signal ring to acquire the rotation data, and the second detection end and the first detection end are sequentially arranged along the rotation direction of the rotating part; the processor is in communication connection with the second detection end, so that the processor can acquire the rotation direction of the rotating piece according to the rotation data of the first detection end and the rotation data of the second detection end.

With reference to the first aspect, in a possible implementation manner, the displacement measuring device for a gantry further includes: the first position sensing part is arranged on the inner gantry and can selectively shield the detection assembly; and the second position sensing part is arranged on the inner gantry, can selectively shield the detection assembly, and is far away from the first position sensing part.

With reference to the first aspect, in a possible implementation manner, the displacement measuring device for a gantry further includes: the connecting frame is fixed on the outer door frame; the connecting shaft is arranged on the connecting frame, and the rotating piece is rotatably connected to the connecting shaft through a connecting piece; and the detection plate is fixedly connected with the connecting frame, the detection assembly is arranged on the detection plate, and the detection plate and the rotating member are arranged oppositely.

With reference to the first aspect, in a possible implementation manner, the displacement measuring device for a gantry further includes: the adjusting assembly is arranged on the connecting frame, the connecting shaft is connected with the connecting frame in a sliding mode, and the adjusting assembly is connected with the connecting shaft to adjust the position of the connecting shaft, so that the rotating piece extrudes the inner door frame.

With reference to the first aspect, in one possible implementation manner, the adjusting component includes: the fixed block is arranged on the connecting frame; the adjusting piece is in threaded connection with the fixed block and penetrates through the fixed block; and the adjusting part is arranged on the connecting shaft and is connected with the adjusting piece.

With reference to the first aspect, in a possible implementation manner, the rotating member includes a gear, and the gear is rotatably connected to the outer gantry; the inner gantry is fixed with a rack, the rack is meshed with the gear, and the extension direction of the rack is parallel to the sliding direction of the inner gantry.

In a second aspect, the present application further provides a gantry, comprising: an outer gantry; the inner door frame is connected with the outer door frame in a sliding manner; and a displacement measuring device for a gantry according to the first aspect of the present application.

The utility model provides a portal that this application second aspect provided when interior portal when sliding, utilizes the quick accurate slip height who measures interior portal of displacement measurement device for the portal to the relative position of portal for between the outer portal is mastered to the realization accuracy.

In a third aspect, the present application further provides a work machine, comprising: an instrument panel; the mast according to the second aspect of the present application, the mast of the mast is provided in the instrument panel with a processor of a displacement measuring device.

The engineering machine that this application third aspect provided, when this portal used, read the data after the treater is handled through the panel board in real time to be convenient for the operating personnel accurate motion state who masters the portal, improve the operating efficiency.

Drawings

The above and other objects, features and advantages of the present application will become more apparent by describing in more detail embodiments of the present application with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings, like reference numbers generally represent like parts or steps.

FIG. 1 illustrates a schematic view of a gantry structure according to some embodiments of the present application.

Fig. 2 is a schematic structural diagram of a displacement measuring device for a gantry according to some embodiments of the present disclosure.

FIG. 3 is a schematic diagram of the detection assembly and processor in some embodiments of the present application.

Fig. 4 shows an enlarged view of the part a of the portal of fig. 1.

Fig. 5 shows an enlarged view of the portion B of the gantry of fig. 1.

Fig. 6 is a schematic structural view of a link frame of the displacement measuring device for a gantry according to some embodiments of the present disclosure.

Fig. 7 is a schematic cross-sectional view of a measuring device for a portal according to some embodiments of the present disclosure.

Detailed Description

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, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Summary of the application

The portal is as one of the component parts of piling up high equipment, and when carrying out relevant operation, the portal need rise certain height, in order to know the rise distance of portal, often realizes through setting up infrared distance meter, stay-supported sensor etc..

Among the prior art, can set up steel wire dish, wire rope etc. on the portal, when the portal carries out relevant operation, wire rope can and portal synchronization action, and rethread stay-supported sensor detects wire rope to through the removal length of measuring wire rope, acquire the removal height of portal. However, the total length of the steel wire rope needs to be kept unchanged, the steel wire rope can be pulled only by pulling the steel wire rope in the lifting process of the gantry, the steel wire rope is easy to deform due to pulling, and the deviation of the stay wire type sensor on the length detection of the steel wire rope can be caused.

The application provides a displacement measurement device for portal, portal and engineering machine tool, through will rotating the direct and interior portal contact of piece, thereby realize rotating the linkage of piece and interior portal, when interior portal risees or descends promptly, it also can take place corresponding rotation thereupon to rotate the piece, the rethread detects the rotation of rotating the piece and produces the rotation data, utilize the treater to rotate the data and handle the rising distance that just can acquire interior portal, with this displacement distance of portal just can accurately master.

Having briefly described the principles of the present application, various non-limiting embodiments of the present application will now be described in detail with reference to the accompanying drawings.

Displacement measuring device for exemplary gantry

FIG. 1 illustrates a schematic view of a gantry structure according to some embodiments of the present application. Referring to fig. 1, the door frame includes an inner door frame 100 and an outer door frame 200. The outer gantry 200 is slidably connected to the inner gantry 100, and specifically, the outer gantry 200 may be fixed to a mechanical device, and the inner gantry 100 is slidably connected to the outer gantry 200.

Fig. 2 is a schematic structural diagram of a displacement measuring device for a gantry according to some embodiments of the present disclosure. FIG. 3 is a schematic diagram of the detection assembly and processor in some embodiments of the present application. Referring to fig. 2 and 3, the apparatus includes: the rotating member 300, the detecting assembly 600 and the processor 800. The rotary member 300 is rotatably coupled to the outer door frame 200, and the rotary member 300 is rotatably coupled to the inner door frame 100. The sensing assembly 600 is disposed on the outer door frame 200, and the sensing assembly 600 is disposed opposite to the rotation member 300 to sense the rotation of the rotation member 300 and acquire rotation data. The processor 800 is communicatively coupled to the sensing assembly 600, and the processor 800 is configured to generate displacement information of the inner gantry 100 based on the rotational data. The processor 800 processes the rotation data, and the processing procedure of obtaining the displacement information is implemented by a conventional computer program, which is not described herein again.

When the device operates, the inner door frame 100 slides relative to the outer door frame 200, the rotating member 300 and the inner door frame 100 contact with each other to generate friction, the inner door frame 100 forms a power member capable of driving the rotating member 300 to rotate, so that the rotating member 300 rotates along with the sliding process of the inner door frame 100, the detection assembly 600 detects the rotation of the rotating member 300 in real time and acquires rotation data, and the processor 800 processes the rotation data. Since the rotation of the rotation member 300 is performed in synchronization with the sliding of the inner door frame 100, the displacement information of the inner door frame 100 can be obtained by processing the rotation data. Therefore, the rotating member 300 is linked with the inner door frame 100, and then the rotating member 300 is detected, so that the sliding height of the inner door frame 100 is detected, and the accuracy of a detection result is effectively improved.

In particular, the gantry in the present application may be a 3-stage gantry, may also be a gantry and a fork blade which are slidably connected, and may also be several other components which can generate relative sliding displacement. In applying the apparatus, one relatively fixed member is selected as the outer gantry 200 in the above description, and another member that is slidably displaced with respect to the member is selected as the inner gantry 100 in the above description, so that the apparatus can be applied.

Referring to fig. 2, in some embodiments of the present application, the apparatus further includes a signal loop 510. The signal ring 510 is disposed on a side surface of the rotation member 300, the signal ring 510 has a signal notch 520, the signal ring 510 is disposed opposite to the detection member 600, and the detection member 600 is configured to sequentially detect the signal ring 510 and the signal notch 520 to acquire rotation data.

Specifically, the signal ring 510 can be a complete ring, and a portion of the ring can be removed to form the signal gap 520, such that when the detecting assembly 600 is opposite to the signal ring 510, a signal can be generated as "1", and when the detecting assembly 600 is opposite to the signal gap 520, a signal can be generated as "0".

Referring to FIG. 2, in some embodiments of the present application, a detection assembly 600 includes a first detector 610. The first detector 610 is fixed to the outer gantry 200, and the first detector 610 has a first detection end disposed toward the signal ring 510 to acquire rotation data. The processor 800 is in communication connection with the first detection end to obtain the number of rotation turns according to the rotation data, and the processor 800 generates displacement information according to the number of rotation turns. Specifically, the first detector 610 may employ a proximity sensor or a photoelectric sensor.

By providing the first detector 610, when the rotating member 300 rotates, the signal ring 510 will rotate synchronously, and the signal notch 520 and the signal ring 510 are opposite to the first detecting end in turn, the first detector 610 can generate a continuous "10101010 … …" signal, and at this time, two adjacent "0" signals or two adjacent "1" signals can indicate that the rotating member 300 has rotated one turn. Thereby detecting the number of rotations of the rotating member 300. The circumference of the rotation member 300 is fixed, and assuming that the circumference of the rotation member 300 is M, the rotation member 300 rotates N times, the distance L moved by the inner gantry 100 is M × N, and the cross-section of the rotation member 300 may be circular, and M is pi × diameter, i.e., L is M × pi × diameter, which is the diameter of the rotation member 300. A computer program may be provided in the processor 800 to implement the above calculation process, so that the moving distance of the inner gantry 100 can be directly obtained through the calculation of the processor 800.

At the same time, the time when the first detector 610 generates the signal may be accumulated, thereby calculating the moving speed of the inner gantry 100 according to the distance to time ratio.

Referring to fig. 2, in some embodiments of the present application, the detection assembly 600 further includes a second detector 620. The second detector 620 is fixed to the outer gantry 200, the second detector 620 has a second detection end, the second detection end is disposed toward the signal ring 510 to acquire rotation data, and the second detection end and the first detection end are sequentially disposed along the rotation direction of the rotation member 300. The processor 800 is in communication connection with the second detection end, so that the processor 800 obtains the rotation direction of the rotation member 300 according to the rotation data of the first detection end and the rotation data of the second detection end.

Specifically, the second detector 620 may be located in the same horizontal plane as the first detector, and when the rotating member 300 rotates, the signal notch 520 may sequentially pass through the second detector 620 and the first detector 610, and the second detection end and the first detection end may sequentially generate a signal of "0". It is assumed that the second detector 620 first generates a "0" signal, and the rotary member 300 is in the forward rotation, i.e., the inner door frame 100 is raised; when the first detector 610 first generates a "0" signal, it is determined that the rotary member 300 is in the reverse rotation, i.e., the inner door frame 100 is lowered. Thus, the raising and lowering of the inner door frame 100 can be determined by judging the rotation direction of the rotation member 300. Specifically, the order of the continuous signals generated by the second detector 620 and the first detector 610 and the correspondence between the forward rotation and the reverse rotation of the rotation member 300 may be set according to the actual situation, and the present application is not limited thereto.

Fig. 4 shows an enlarged view of the part a of the portal of fig. 1. Fig. 5 shows an enlarged view of the portion B of the gantry of fig. 1. Referring to fig. 4 and 5, in some embodiments of the present application, the apparatus further includes a first position sensing part 140 and a second position sensing part 150. The first position sensing part 140 is disposed on the inner gantry 100, and the first position sensing part 140 may selectively shield the sensing assembly 600. The second position sensing part 150 is disposed on the inner gantry 100, the second position sensing part 150 can selectively shield the detecting assembly 600, and the second position sensing part 150 is disposed far away from the first position sensing part 140.

Specifically, the first position sensing part 140 and the second position sensing part 150 may both adopt a plate-shaped structure, and the first position sensing part 140 is located at the top position of the inner gantry 100, and the second position sensing part 150 is located at the bottom position of the inner gantry 100.

When the inner door frame 100 is at the initial position, the first position sensing part 140 is inserted between the sensing assembly 600 and the rotating member 300 to block the sensing assembly 600, which indicates that the inner door frame 100 is at the initial position. When the inner gantry 100 slides to the uppermost position, the first position sensing part 140 is separated from between the sensing assembly 600 and the rotating member 300, and the second position sensing part 150 is inserted between the sensing assembly 600 and the rotating member 300 to shield the sensing assembly 600, which means that the inner gantry 100 is at the uppermost position.

When the first position sensing part 140 or the second position sensing part 150 blocks the sensing assembly 600, the first detector 610 and the second detector 620 simultaneously generate a signal of "0", which indicates that the inner door frame 100 is at the initial position or the uppermost position.

Fig. 6 is a schematic structural view of a link frame of the displacement measuring device for a gantry according to some embodiments of the present disclosure. Referring to fig. 6, in some embodiments of the present application, the apparatus further comprises: a connecting frame 110, a connecting shaft 120 and a detection plate 130. The link frame 110 is fixed to the outer gantry 200. The connecting shaft 120 is provided on the connecting frame 110, and the rotating member 300 is rotatably connected to the connecting shaft 120 through the connecting member 121. The sensing plate 130 is fixedly coupled to the coupling frame 110, the sensing unit 600 is disposed on the sensing plate 130, and the sensing plate 130 is disposed opposite to the rotating member 300.

Specifically, the connecting frame 110 includes two vertically connected plates, i.e., a vertical plate and a horizontal plate, the vertical plate and the horizontal plate can be integrally manufactured, and one side of the horizontal plate away from the vertical plate is welded to the outer door frame 200. The connecting shaft 120 is rotatably connected to the vertical plate, and the detecting plate 130 is welded to the bottom wall of the transverse plate. The detecting plate 130 is arranged opposite to the vertical plate, the rotating member 300 is located between the vertical plate and the detecting plate 130, one side of the rotating member 300 extends out of the connecting frame 110, and one side of the rotating member 300 extending out of the connecting frame 110 is connected with the inner gantry 100.

When the inner door frame 100 slides, the inner door frame 100 drives the rotating member 300 to rotate, the rotating member 300 rotates around the axis of the connecting shaft 120 as a rotation center, and the detecting assembly 600 disposed on the detecting plate 130 can detect the rotating member 300. Meanwhile, the connecting piece 121 can be a bearing or a wear-resistant sleeve. The connecting element 121 is sleeved on the connecting shaft 120, and the rotating element 300 is sleeved on the connecting element 121, so that the friction between the rotating element 300 and the connecting shaft 120 is reduced.

Fig. 7 is a schematic cross-sectional view of a measuring device for a portal according to some embodiments of the present disclosure. Referring to fig. 7, in some embodiments of the present application, the apparatus further comprises: the assembly 700 is adjusted. The adjusting assembly 700 is disposed on the link frame 110, the connecting shaft 120 is slidably connected with the link frame 110, and the adjusting assembly 700 is connected with the connecting shaft 120 to adjust the position of the connecting shaft 120 such that the rotating member 300 presses the inner door frame 100.

Specifically, the adjusting assembly 700 is disposed on a side of a vertical plate far away from the detecting plate 130, a gap for the connecting shaft 120 to slide is formed on the vertical plate, and the connecting shaft 120 is located between the adjusting assembly 700 and the inner gantry 100. In operation, the adjusting assembly 700 may drive the connecting shaft 120 to slide in the gap, and the connecting shaft 120 may drive the rotating member 300 to move, so as to tightly contact the rotating member 300 with the inner door frame 100.

Referring to fig. 7, in some embodiments of the present application, an adjustment assembly 700 includes a fixing block 710, an adjustment member 720, and an adjustment portion 730. The fixing block 710 is disposed on the connection frame 110. The adjusting member 720 is screw-coupled to the fixing block 710, and the adjusting member 720 penetrates the fixing block 710. The adjusting part 730 is provided on the connecting shaft 120, and the adjusting part 730 is connected with the adjusting member 720.

Specifically, the fixing block 710 is welded to the side wall of the vertical plate, and the fixing block 710 may also be integrally formed with the vertical plate. Adjusting part 720 can adopt adjusting screw, and adjusting screw runs through fixed block 710 setting, and adjusting screw runs through in the one end of fixed block 710 inserts regulation portion 730, and the cross-section of regulation portion 730 can be circular, offers on the perisporium of regulation portion 730 to supply adjusting screw male jack, and the welding of adjusting screw inserts the one end of jack has the fixture block, and the cross-sectional area of fixture block is greater than the cross-sectional area of jack. The adjusting portion 730 is sleeved on the connecting shaft 120, and the adjusting portion 730 is fixedly connected with the connecting shaft 120.

When the position of the connecting shaft 120 needs to be adjusted, the adjusting member 720 is rotated, because the adjusting member 720 is in threaded connection with the fixing block 710, the adjusting member 720 is rotated to be lifted, the adjusting portion 730 is driven to move when the adjusting member 720 is lifted, and the adjusting portion 730 drives the connecting shaft 120 to move, so that the rotating member 300 is smoothly driven to move.

Referring to fig. 5 and 7, in some embodiments of the present application, the rotating member 300 includes a gear rotatably coupled to the outer gantry 200; wherein, a rack 400 is fixed on the inner door frame 100, the rack 400 is engaged with the gear, and the extension direction of the rack 400 is parallel to the sliding direction of the inner door frame 100.

Specifically, the gear is sleeved on the connecting shaft 120 through the connecting member 121, the rack 400 may be welded to the inner gantry 100, and when the inner gantry 100 moves, the rack 400 may drive the gear to rotate. Meanwhile, the first position sensing part 140 and the second position sensing part 150 are respectively fixed at both ends of the rack 400, and the first position sensing part 140 is located above the second position sensing part 150.

Therefore, when the inner gantry 100 is at the initial position, the first position sensing part 140 shields the detection assembly 600, when the inner gantry 100 starts to slide, the inner gantry 100 drives the rack 400, the first position sensing part 140 and the second position sensing part 150 to move simultaneously, the rack 400 drives the gear to move, thereby avoiding the possibility of slipping, and the first position sensing part 140 is separated from the detection assembly 600, and when the second position sensing part 150 shields the detection assembly 600, the inner gantry 100 is indicated to slide to the maximum height.

Exemplary Portal

This portal includes: the outer gantry 200, the inner gantry 100 and the displacement measuring device for the gantry as described in any of the above embodiments. The inner gantry 100 is slidably connected with the outer gantry 200.

Specifically, the outer gantry 200 may be fixed to a construction machine. When the inner gantry 100 slides, the sliding height of the inner gantry 100 is rapidly and accurately measured by using the displacement measuring device for the gantry, thereby realizing accurate grasp of the relative position between the inner gantry 100 and the outer gantry 200.

Since the gantry is provided with the displacement measuring device for the gantry, the gantry has all the technical effects of the displacement measuring device for the gantry, which are not described herein again. .

Exemplary working machine

The construction machine includes: the instrument panel and the door frame as described in the above embodiments are provided in the instrument panel by the processor 800 of the displacement measuring device for the door frame.

When the door frame is used, the data processed by the processor 800 are read in real time through the instrument panel, and the moving distance of the inner door frame 100 calculated by the processor 800 can be displayed through the instrument panel. Therefore, the operating personnel can more conveniently and accurately master the motion state of the gantry, and the operating efficiency is improved.

Since the engineering machine is provided with the gantry, the engineering machine has all the technical effects of the gantry, and is not described herein.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modifications, equivalents and the like that are within the spirit and principle of the present application should be included in the scope of the present application.

Claims (11)

1. A displacement measuring device for a gantry comprises an inner gantry (100) and an outer gantry (200), wherein the outer gantry (200) is connected with the inner gantry (100) in a sliding manner; characterized in that, displacement measurement device for portal includes:

the rotating piece (300) is rotatably connected to the outer door frame (200), and the rotating piece (300) is in rolling connection with the inner door frame (100);

the detection assembly (600) is arranged on the outer door frame (200), and the detection assembly (600) is arranged opposite to the rotating piece (300) so as to detect the rotation of the rotating piece (300) and acquire rotation data; and

a processor (800) communicatively coupled to the detection assembly (600), the processor (800) configured to generate displacement information for the inner gantry (100) based on the rotation data.

2. The displacement measuring device for a gantry according to claim 1, comprising:

a signal ring (510) disposed on a side surface of the rotating member (300), the signal ring (510) having a signal notch (520), the signal ring (510) being disposed opposite to the detecting assembly (600), the detecting assembly (600) being configured to sequentially detect the signal ring (510) and the signal notch (520) to acquire the rotation data.

3. Displacement measuring device for gantries in accordance with claim 2, characterized in that the detection assembly (600) comprises:

a first detector (610) fixed to the outer gantry (200), the first detector (610) having a first detection end disposed toward the signal ring (510) to acquire the rotation data;

the processor (800) is in communication connection with the first detection end to acquire the number of rotation turns according to the rotation data, and the processor (800) generates the displacement information according to the number of rotation turns.

4. Displacement measuring device for gantries in accordance with claim 3 characterized in that said detecting assembly (600) further comprises:

the second detector (620) is fixed on the outer gantry (200), the second detector (620) is provided with a second detection end, the second detection end faces the signal ring (510) to obtain the rotation data, and the second detection end and the first detection end are sequentially arranged along the rotation direction of the rotating part;

the processor (800) is in communication connection with the second detection end, so that the processor (800) acquires the rotation direction of the rotation member according to the rotation data of the first detection end and the rotation data of the second detection end.

5. The displacement measuring device for a gantry according to any one of claims 1 to 4, further comprising:

a first position sensing part (140) disposed on the inner gantry (100), the first position sensing part (140) selectively shielding the detection assembly (600); and

the second position sensing part (150) is arranged on the inner door frame (100), the second position sensing part (150) can selectively shield the detection assembly (600), and the second position sensing part (150) is far away from the first position sensing part (140).

6. The displacement measuring device for a gantry according to any one of claims 1 to 4, further comprising:

the connecting frame (110) is fixed on the outer door frame (200);

the connecting shaft (120) is arranged on the connecting frame (110), and the rotating piece (300) is rotatably connected to the connecting shaft (120) through a connecting piece (121); and

the detection plate (130) is fixedly connected with the connecting frame (110), the detection assembly (600) is arranged on the detection plate (130), and the detection plate (130) is arranged opposite to the rotating member (300).

7. The displacement measuring device for a gantry according to claim 6, further comprising:

the adjusting assembly (700) is arranged on the connecting frame (110), the connecting shaft (120) is in sliding connection with the connecting frame (110), and the adjusting assembly (700) is connected with the connecting shaft (120) to adjust the position of the connecting shaft (120), so that the rotating piece (300) extrudes the inner door frame (100).

8. Displacement measuring device for gantries in accordance with claim 7 characterised in that the adjustment assembly (700) comprises:

a fixing block (710) disposed on the connecting frame (110);

the adjusting piece (720) is in threaded connection with the fixed block (710), and the adjusting piece (720) penetrates through the fixed block (710); and

and the adjusting part (730) is arranged on the connecting shaft (120), and the adjusting part (730) is connected with the adjusting piece (720).

9. Displacement measuring device for gantries in accordance with any of the previous claims 1 to 4 characterised in that the rotary member (300) comprises a gear wheel, which is rotationally connected to the outer gantry;

a rack (400) is fixed on the inner door frame (100), the rack (400) is meshed with the gear, and the extending direction of the rack (400) is parallel to the sliding direction of the inner door frame (100).

10. A portal, characterized in that it comprises:

an outer gantry (200);

the inner gantry (100) is connected with the outer gantry (200) in a sliding mode; and

displacement measuring device for gantries as claimed in any of the claims 1 to 9.

11. A work machine, characterized in that the work machine comprises:

an instrument panel;

gantry as claimed in claim 10, said gantry of said gantry being provided in said instrument panel with a processor (800) of a displacement measuring device.

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