CN113685133A

CN113685133A - Single-rail four-arm anchor rod trolley

Info

Publication number: CN113685133A
Application number: CN202111135401.4A
Authority: CN
Inventors: 蒋国际; 邹海波; 刘铭宇; 王浩权; 赵飞龙; 段启喜; 杨明; 张其智; 李小祥; 徐嘉麟
Original assignee: Jiangxi Siton Machinery Manufacturing Co Ltd
Current assignee: Jiangxi Siton Machinery Manufacturing Co Ltd
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2021-11-23

Abstract

The utility model provides a single track four arms stock platform truck, belong to tunnelling machinery technical field, it is provided with two interior drilling booms, two outer drilling booms, interior drilling boom can rotate and accomodate to the work platform top, outer drilling boom includes the roating seat, the swing arm, sliding seat isotructure, make outer drilling boom possess a plurality of activity directions, and can carry out the construction of bottom plate group stock, and simultaneously, be provided with vice platform on the interior drilling boom, be provided with the manned platform of liftable on the outer drilling boom, vice platform is used for the people of standing with manned platform, can provide better field of vision scope for constructor.

Description

Single-rail four-arm anchor rod trolley

Technical Field

The invention belongs to the technical field of roadway tunneling machinery, and particularly relates to a monorail four-arm anchor rod trolley.

Background

Anchor bolt support's construction procedure is including punching, carry the anchoring agent, stir the anchoring agent, install the stock anchor rope, carry out stretch-draw pretension etc. to the stock, the flow is loaded down with trivial details, artifical degree of dependence is high, consequently, stock platform truck has appeared, again, all kinds of ground walking equipment need repeat the wrong car during the operation, cause the tunnel vacant top, in order to save the wrong car time, reduce the potential safety hazard, continuously there is the hanging rail to bore anchor equipment to begin to try out on the market, but rock drilling machine or the stock drilling machine quantity that this kind of hanging rail bore anchor equipment loaded usually is less (one set or two), and the drilling boom is not nimble enough, the operating efficiency is not high.

For example, the patent with publication number CN111663896A provides a monorail crane four-arm hydraulic support anchor rod and anchor cable drilling machine for coal mines, which comprises a suspension rail, a main platform, a power platform, a driving assembly, a combined support platform, a working platform, an anchor rod drilling machine assembly and a rock drilling machine assembly; the suspension rail is arranged at the top of the roadway, the main platform, the power platform and the driving assembly are connected to the bottom of the suspension rail, and the driving assembly drives the main platform and the power platform to move along the suspension rail; the combined supporting platform is positioned at the head end of the main platform and supports the top of the roadway at the head end of the main platform; the telescopic boom is arranged at the head end of the working platform and connected with the working platform through a telescopic oil cylinder, the telescopic oil cylinder controls the telescopic boom to stretch out and draw back, the cantilever arm support of the platform main body is arranged at the head end of the working platform, the telescopic boom is connected with the cantilever arm support of the platform main body through a guide mechanism, and the operating platform is arranged at the top of the head end of the telescopic boom.

In the prior art, the anchor rod trolley is generally provided with a left group of telescopic arms and a right group of telescopic arms, and the anchor rod machine and the working platform are further arranged on the telescopic arms, so that when the anchor rod machine is stretched back and forth, the two groups of telescopic arms are required to be synchronous, otherwise, the relative motion of two people standing platforms is caused, and an injury accident occurs, namely, the anchor rod machines of four arms are basically synchronously supported forwards and cannot be mutually and independently supported; meanwhile, a group of two telescopic arms are generally arranged, and the distance between the two telescopic arms is small, so that when the bolting machine is retracted, the rocker arm must be swung outwards by a certain angle to make a rotation space of the bolting machine, and the requirement of the whole machine on the width of a roadway for supporting the bolting machine is increased; in addition, the construction of the outer side wall part by the anchor machine is inconvenient, and the construction of the anchor rod of the bottom plate wall is difficult.

Disclosure of Invention

This disclosure provides a single track four arms stock platform truck to among the prior art, the people platform of standing, flexible arm isotructure of four arms stock platform truck set up reasonable inadequately, lead to the stock machine of four arms to support by mutual independence, and is not nimble enough, and the construction outside group portion is inconvenient, be difficult to carry out the problem of the construction of bottom plate group stock, provides a single track four arms stock platform truck.

One of the concepts of the present disclosure is to provide a monorail four-arm anchor rod trolley, wherein when the monorail four-arm anchor rod trolley is in a walking state, the whole working mechanism part is hoisted, the drill boom device, the supporting device and the like are all retracted, at this time, only the top space of the roadway is occupied, the entering and exiting of other construction equipment on the ground cannot be affected, the problems that the existing ground equipment is inflexible to move and difficult to get across the trolley are solved, and when the monorail four-arm anchor rod trolley is shifted to a working state, the working mechanism part is driven by the first lifting mechanism to descend to a working position.

Another idea of the present disclosure lies in that the anchor bar trolley is provided with an inner side telescopic arm and two outer side telescopic arms, comparing with the existing structure of only providing two anchor bar machines, the present disclosure can install four anchor bar machines, increasing the number of the installable anchor bar machines, and greatly improving the working efficiency of the anchor bar trolley.

Another concept of the present disclosure is that the anchor bar trolley includes a work platform including an inner telescopic frame for mounting the inner telescopic arm and an outer telescopic frame for mounting the outer telescopic arm.

Another idea of the present disclosure is to set up an auxiliary platform through the telescopic boom inside, so that the auxiliary platform can translate along with the telescopic boom inside, and a constructor stands on the auxiliary platform and can extend out along with the anchor rod machine, thereby having a better operation view and increasing the construction convenience.

Another concept of the present disclosure is that the anchor bar trolley further includes a supporting device, which is disposed on the sub-platform, so that the supporting device has a larger moving space, and the flexibility of the supporting device is improved.

Another idea of the present disclosure is that the work platform is provided with a first leg at the front end of the work platform and the structure of the first leg is optimized so that the stability of the bolter is better.

Another design of this disclosure lies in, installation roating seat on the flexible arm in outside, sets up the swing arm on the roating seat, and outside bolter is installed on the swing arm to roating seat, swing arm can be respectively at two mutually perpendicular plane internal rotations, and the nimble degree of outside bolter is higher, can adapt to different tunnel environment, and simultaneously, the flexible arm in outside can be fine shrink, avoids the mistake to touch.

Another idea of the present disclosure is that the rotating seat is connected to a liftable manned platform, and the manned platform freely falls down when not in use, so as to reduce the overall size.

Another concept of the present disclosure is to provide a hinge frame connected to the rotary base, the hinge frame is used for mounting a manned platform, the manned platform is provided with a first locking hole, the hinge frame for mounting the manned platform is provided with a second locking hole, when the manned platform is in a horizontal state, the first locking hole and the second locking hole are in an aligned state, and at this time, a locking pin is inserted between the first locking hole and the second locking hole to lock the manned platform, thereby solving the problem of complex mechanism structure of the manned platform in the prior art, and the locking mechanism has simple structure, low cost, and is stable and reliable.

Another concept of the present disclosure is to provide a sliding rail, a transmission mechanism and a sliding seat in the swing arm, wherein the sliding seat is used for installing the external bolting machine, and the sliding seat slides along the sliding rail under the driving of the transmission mechanism to drive the external bolting machine to move so as to achieve the effect of expanding the stroke of the bolting machine.

Another idea of the present disclosure is that the transmission mechanism is provided with an oil cylinder and a chain, the oil cylinder is installed at the bottom of the swing arm, the chain is arranged on the oil cylinder, the oil cylinder can stretch and retract to drive the chain to integrally displace, and the chain is respectively connected with the frame body and the sliding seat, and rotates when the chain integrally displaces, so as to drive the sliding seat to slide along the sliding rail.

Another design of this disclosure lies in, inboard roofbolter passes through the connecting seat and installs at inboard flexible arm, and the connecting seat can rotate from top to bottom, and when the stock platform truck of messenger walked, the second landing leg can the level forward, and inboard roofbolter then level is folding backward, simple structure, and spare part is little, and the shrink volume of folding back whole operating device portion is less.

The utility model provides a monorail four-arm anchor rod trolley, which comprises a hanging rail, a power part, a driving trolley, a bearing trolley, a first lifting mechanism and a working mechanism part, wherein the working mechanism part comprises a working platform, a drill arm device and a supporting device which are arranged on the working platform;

the hanger rail is installed at the top of the roadway, the power part, the driving trolley and the bearing trolley are all installed on the hanger rail, a hydraulic pump station and an electrical system are installed in the power part, the bearing trolley travels along the hanger rail under the driving of the driving trolley, the working platform is connected with the bearing trolley through a first lifting mechanism, and the first lifting mechanism drives the working platform to lift.

In some embodiments, the working platform is provided with a telescopic arm and a telescopic frame, the telescopic arm comprises an inner telescopic arm and two outer telescopic arms, and the telescopic frame comprises an inner telescopic frame and an outer telescopic frame;

the inner side telescopic frame is used for installing the inner side telescopic arm, and the outer side telescopic frame is used for installing the outer side telescopic arm.

Firstly, four anchor rod machines can be installed in the technical scheme, and the working efficiency of the anchor rod drilling machine is greatly improved. Secondly, among the prior art, four bolters of stock platform truck are mostly synchronous forward supporting, can not strut by mutual independence, and this application sets up inboard flexible arm and the flexible arm mutually independent in the outside, each other does not influence, and two flexible arms in the outside are when carrying out group anchor bolt support, and the inboard flexible arm can strut anchor rope or one row of preceding middle part stock forward, has improved the use convenience greatly, satisfies more user demands.

Further, the inboard flexible arm is connected with vice platform, vice platform can be along with the flexible removal of inboard flexible arm, and vice platform is as standing people's platform for the field of vision is better when constructor operates, has improved work efficiency, satisfies more user demands.

In some embodiments, the anchor rod trolley further comprises a supporting device, the supporting device is connected with the secondary platform, and the supporting device is arranged on the secondary platform and can move back and forth along with the inner telescopic arm, so that the movable space of the supporting device is larger, and the flexibility of the supporting device is improved.

Furthermore, the second supporting leg for supporting the ground is additionally arranged at the bottom of the auxiliary platform, so that the stability of the working mechanism part can be improved.

In some embodiments, the outer edge of the secondary platform is provided with a protrusion, so that tools such as a non-slip mat and the like can be placed in the secondary platform, and the safety of an operator standing in the secondary platform is better and more convenient.

In some embodiments, the outboard bolter is mounted on the outboard telescoping arm by:

the rotating seat is arranged on the outer telescopic arm and can rotate around the outer telescopic arm in the first plane;

the swinging arm is arranged on the rotating seat and can rotate around the rotating seat in the plane II; the first plane is vertical to the second plane; a slide rail is arranged on the swing arm;

the sliding seat is arranged on the swing arm and can move along the sliding rail;

and the mounting seat is used for mounting the outer side bolting machine, is mounted on the sliding seat and can rotate in the third plane relative to the sliding seat.

Furthermore, the rotating seat is connected with the outer telescopic arm through a first rotating shaft, and the axial direction of the first rotating shaft is parallel to the length direction of the outer telescopic arm.

Specifically, the rotating seat is installed on the outer telescopic arm, and the axial direction of the first rotating shaft is parallel to the length direction of the outer telescopic arm. Obviously, the first rotation axis is perpendicular to the first plane.

In this application, the length direction of outside telescopic boom, the direction that moves forward or retreat that the stock platform truck removed in the tunnel promptly. The telescopic arm works to drive the rotating seat and the outside bolting machine to move forwards and work in cooperation with the outside bolting machine. In a non-working state, the telescopic arm can drive the rotating seat and the outer side anchor rod machine to retreat, and the size of the whole product is reduced.

The setting of roating seat for the anchor rod machine in the outside is on the vertical face of the flexible arm of perpendicular to, but rotation angle regulation, promptly in tunnel width range, can adjust the angle of outside anchor rod machine, carries out the selection of the positive top surface in tunnel, side top surface position.

In some embodiments of the present application, a back side surface of the swing arm is connected to the rotating base through a second rotating shaft, and the second rotating shaft is perpendicular to a different surface of the swing arm. That is, the second rotation axis is parallel to the first plane, and the second plane in this application is changed along with the rotation of the rotation base. The swing arm rotates around the second rotating shaft, so that the outer side bolter can be adjusted to rotate forwards or backwards. The forward and backward directions here mean that the advancing direction of the anchor bar carriage is forward and the retreating direction of the anchor bar carriage is backward.

In some embodiments of the present application, the sliding rail and the second rotating shaft are disposed on two opposite sides of the swing arm. The rotation of the swing arm and the movement of the sliding seat can not interfere with each other, the precondition that two actions are carried out simultaneously is also met, and the outer side bolting machine can be quickly adjusted to a preset position.

In some embodiments of the present application, the sliding rail is disposed along a length direction of the swing arm, and the sliding seat is mounted on the sliding rail, and the sliding seat can move back and forth along the sliding rail under the driving of the power device.

The arrangement of the sliding rail and the sliding seat on the swinging arm assists the outward extension of the outer side bolting machine. And the outside bolting machine can be retracted under the non-working state. Preferably, the length of the outer bolter is adapted to the length of the oscillating arm. The outer side bolter can keep almost flush with the swing arm after being contracted, and occupied space is small.

In some embodiments of the present application, the swivel base on still install manned platform, manned platform pass through second elevating system and be connected with the swivel base.

Specifically, the flexible arm in outside be connected with the mounting bracket, a side and second elevating system, the flexible arm in outside of mounting bracket be connected, another side roating seat of mounting bracket is connected.

In some embodiments of the present application, the second lift mechanism includes a link and a hinge bracket, the hinge bracket is disposed on one side of the people platform, and the hinge bracket is rotatable relative to the people platform. Specifically, the manned platform moves to a horizontal state, namely the working state of the manned platform, and an operator can stand on the manned platform. Or the manned platform vertically falls, and the manned platform is in the contraction state this moment, and the volume of stock platform truck is less.

In some embodiments of the present application, the connecting rod is a bent L-shaped structure, one end of the connecting rod is connected to the mounting bracket, and the connecting rod is rotatable relative to the mounting bracket. Specifically, the connecting position of the connecting rod and the mounting frame is located at the lower part of the mounting frame and close to one corner of the inner side bolter. When the hinged frame is positioned at a low position, the connecting rod at one end connected with the mounting frame is in a vertical state, and the connecting rod at one end connected with the hinged frame is in a horizontal state. An operator can easily stand on the manned platform at the moment, and the connecting rod rotates upwards to drive the manned platform to move upwards.

Until the connecting rod rotates to the limit position, namely the connecting rod at one end connected with the mounting frame is in a horizontal state, the connecting rod at one end connected with the hinged frame is in a vertical state, and the hinged frame reaches the highest position, namely the manned platform reaches the highest position. The space occupied by the connecting rod is minimum at this moment, and the connecting rod is almost attached to the outer side of the rotating seat. When the manned platform is not needed, the manned platform is turned downwards relative to the hinged frame, so that the manned platform is in a vertical state and is positioned outside the connecting rod. At the moment, the manned platform is in a contraction state, and the whole volume is small.

The power device comprises a second power cylinder, the second power cylinder is installed on one side face of the mounting frame, and the second power cylinder is connected with the connecting rod through the torsion arm. The second power cylinder works to drive the torsion arm to rotate, and the rotating torsion arm drives the connecting rod to rotate.

In some embodiments, the swing arm includes a frame body, a transmission mechanism and a sliding seat, a vertical sliding rail is disposed on the frame body, the sliding seat is used for mounting the outer side bolting machine, the sliding seat slides along the sliding rail under the driving of the transmission mechanism to drive the outer side bolting machine to move, the stroke of the bolting machine can be enlarged, and the working angle and position of the bolting machine can be adjusted more easily.

In some embodiments, two first locking holes are arranged on two sides of the manned platform;

the manned platform is mounted on the hinge frame and can rotate along the hinge frame, two second lock holes matched with the first lock holes are formed in the hinge frame, and the first lock holes and the second lock holes are located on the same horizontal straight line when the manned platform is in a horizontal state;

the lock pin is horizontally arranged and is used for being inserted into the first lock hole and the second lock hole to enable the manned platform to be kept in a horizontal state;

the chain, chain one end is connected on the lockpin, and the other end is fixed on articulated frame, the chain is provided with the regulating part, through control the regulating part enables the chain to drive the lockpin motion.

Furthermore, the chain can drive the lock pin to move inwards by controlling the adjusting part, so that the lock pin slides out of the first lock hole or the second lock hole on the outer side, or the chain extrudes the lock pin outwards, so that the lock pin is inserted into the first lock hole or the second lock hole.

In some embodiments, the first locking hole is disposed outside the second locking hole. By controlling the adjusting part, when the chain drives the lock pin to move inwards, the lock pin is separated from the first lock hole and still located in the second lock hole.

Compared with the prior art, the anchor rod trolley provided by the disclosure has the following beneficial technical effects:

1. among the prior art compares, rocking arm makes the distance increase of roofbolter drill box and meeting head about the installation of roofbolter front end, makes its sky roof apart from reaching more than 700mm, and this application roofbolter is direct to contact with meeting head, has shortened the distance of roofbolter and meeting head.

2. The manned platforms on the auxiliary platform and the two sides are arranged, so that the construction personnel can stand more flexibly, the visual field is better during construction, the manned platform can be lifted up and down, and the construction personnel can get on the auxiliary platform by means of the manned platform on the outer side.

3. Compared with the prior art, a plurality of anchor rod machines can only be synchronously supported, the inner side anchor rod machine and the outer side anchor rod machine can be independently controlled, the outer side anchor rod machine can support an anchor cable or a front row of middle anchor rods forwards when the anchor rod supporting of the side part is carried out.

4. This application, outside roofbolter activity direction is nimble to set up swing arm, sliding seat, can realize that horizontal group portion anchor bolt is strutted, and roofbolter construction outside group portion is more nimble, and drilling angle adjustment is convenient.

5. The construction of bottom plate group stock is difficult to realize to current stock platform truck, and this application installs the sliding seat on the swing arm, and the swing arm can rotate 180 backs, and the extreme low position is placed with the roofbolter to the control sliding seat, realizes the construction of bottom plate group stock, and simultaneously, manned platform can drop to the extreme low position, guarantees constructor's the field of vision.

Drawings

The present disclosure will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of illustrating the preferred embodiments and therefore should not be taken as limiting the scope of the present disclosure. Furthermore, unless specifically stated otherwise, the drawings are merely schematic representations based on conceptual representations of elements or structures depicted and may contain exaggerated displays and are not necessarily drawn to scale.

FIG. 1: the structural schematic diagram of the working mechanism part of the monorail four-arm anchor rod trolley provided by the disclosure;

FIG. 2: FIG. 1 is a schematic structural view of a work platform;

FIG. 3: the utility model provides a partial structure schematic diagram of the operating device portion of single track four-arm stock platform truck.

FIG. 4 is a schematic structural view of a first leg provided by the present disclosure;

FIG. 5 is a schematic structural view of the anchor bar trolley provided by the present disclosure;

FIG. 6 is a schematic view of a first configuration of the outer drill boom;

FIG. 7 is another partial schematic structural view of the working mechanism part of the monorail four-arm anchor rod trolley provided by the disclosure.

FIG. 8: the present disclosure provides a schematic structural view of a swing arm of an outboard bolter;

FIG. 9: another schematic structural view of a swing arm of an outboard bolter is provided by the present disclosure;

FIG. 10: the present disclosure provides a partial structural schematic view of a swing arm of an outboard bolter;

FIG. 11: FIG. 10 is a schematic sectional view taken along line A-A;

FIG. 12: FIG. 10 is a schematic sectional view taken along line B-B;

FIG. 13: FIG. 10 is a schematic cross-sectional view taken along the line C-C;

FIG. 14: another partial schematic structural view of a swing arm of an outboard bolter is provided by the present disclosure;

FIG. 15: the present disclosure provides a partially sectioned schematic view of a swing arm of an outboard bolter;

FIG. 16: the structure schematic diagram of a locking mechanism of a manned platform provided by the present disclosure;

FIG. 17: the present disclosure provides a schematic structural view of another angle of a locking mechanism of a people carrying platform;

FIG. 18: the present disclosure provides a structural schematic view of a further angle of a locking mechanism of a people carrying platform;

FIG. 19: the cross section in the D-D direction of the locking mechanism of the manned platform is schematic;

FIG. 20: the structure schematic diagram of the locking mechanism of the manned platform provided by the present disclosure is when the manned platform naturally falls;

FIG. 21: the present disclosure provides a schematic structural view of another angle of a locking mechanism of a people carrying platform when the people carrying platform falls naturally;

FIG. 22: a first structural schematic view of a monorail four-arm anchor trolley provided by the present disclosure;

FIG. 23: a second structural schematic view of a monorail four-arm anchor trolley provided by the present disclosure;

FIG. 24: a third structural schematic diagram of a monorail four-arm anchor rod trolley provided by the present disclosure;

FIG. 25: a fourth structural schematic view of a monorail four-arm anchor trolley provided by the present disclosure;

wherein, 1, a rotating seat; 2. a swing arm; 4. a mounting seat; 5. an outer bolter; 6. an outer telescopic arm; 10. a slide rail;

03. a lock pin; 04. a first chain; 05. a bolt; 011. a second lock hole; 021. a first lock hole; 041. an adjustment section; 014. a power cylinder; 016. a connecting rod; 017. a hinged frame;

11. a support frame; 12. a support leg; 13. an L-shaped bracket; 14. a manned platform; 15. a working platform; 16. a third leg; 17. a second leg;

21. an inner telescopic arm; 22. an inside bolter; 23. a connecting seat; 28. a secondary platform;

41. a frame body; 411. a second fixing member; 42. a sliding seat; 421. a first fixing member; 43. an oil cylinder; 431. a first fixed pulley; 432. a second fixed pulley; 44. a second chain; 45. an adjustment mechanism.

Detailed Description

The present disclosure is described in detail below with reference to the attached drawings.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present disclosure will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the disclosure and are not intended to limit the disclosure.

The first embodiment is as follows: the working mechanism part of the monorail four-arm anchor rod trolley is described in detail as follows:

as shown in fig. 1-3, the working mechanism portion includes a working platform 15, a telescopic boom and a telescopic frame are arranged on the working platform 15, the telescopic boom includes an inner telescopic boom 21 and two outer telescopic booms 6, the working efficiency of the jumbolter is improved by arranging two flexible outer telescopic booms, and the telescopic frame includes an inner telescopic frame and an outer telescopic frame;

further, the inner telescopic frame is used for installing and controlling the inner telescopic arm 21, and the outer telescopic frame is used for installing and controlling the outer telescopic arm 6, so that the telescopic arms are independent and do not influence each other.

As an improvement, the inner telescopic frame or the inner telescopic arm 21 can be of an integrated structure, synchronous support of the two inner roof bolters is achieved, and the inner telescopic arm 21 and the outer telescopic arm 6 are arranged independently and do not affect each other.

Further, the inner telescopic arm 21 is connected with an auxiliary platform 28, so that the auxiliary platform 28 can move telescopically along with the inner telescopic arm 21, and the flexibility of the device is improved.

Further, the secondary platform 28 is a standing platform, increasing the operating field and workspace.

The anchor bar trolley further comprises a support device, and the support device is connected with the auxiliary platform 28, so that the flexibility of the support device is improved.

Further, the second landing leg 17 that vice platform 28 bottom was provided with the branch structure, second landing leg 17 are used for supporting vice platform 28, improve vice platform 28 and supporting device's stability, and second landing leg 17 and vice platform 28 swivelling joint can accomodate second landing leg 17 when the stock platform truck marchs on the hanger rail, reduce the volume, improve the flexibility.

Furthermore, the outer edge of the auxiliary platform 28 is provided with a bulge, so that tools such as anti-skid pads can be placed in the auxiliary platform 28, and the safety of operators standing in the auxiliary platform 28 is better and more convenient.

Inboard flexible arm 21 is connected with vice platform 28, inboard flexible arm 21 and the flexible arm 6 independent setting in the outside, make the scalable removal of vice platform 28, be connected with supporting device through vice platform 28, make the stock platform truck need not to advance, it is flexible only to need the inboard flexible arm 21 of control to drive vice platform 28, make operating personnel and supporting device advance, the flexibility of supporting device and the work efficiency of stock platform truck have been improved, and, when vice platform 28 removes to suitable position, support through bottom second landing leg 17, the stability of operating device portion when the operation has been improved greatly.

In some embodiments, a main platform is also provided on the work platform 15, which is immovable relative to the frame 41 of the work platform 15, and preferably, a constructor can stand on the main platform to operate the entire anchor bar trolley, or can be operated remotely.

Example two: a leg, described in detail as follows:

as shown in fig. 2, 4 and 5, the anchor bar trolley is provided with a first support leg: the first supporting leg comprises a supporting frame 11 and supporting legs 12 arranged on two sides of the supporting frame 11, and compared with a single supporting rod structure, the structural strength of the supporting frame 11 is obviously higher; compare in the single point contact on branch and ground, this application support frame 11 is bigger with the area of bottom surface contact, and stability is better. The support leg 12 is connected with the support frame 11, and the support leg 12 is rotatable relative to the support frame 11, so that the contact area of the whole first support leg and the bottom surface is further enhanced through the support leg 12, and the stability of the first support leg during supporting is improved. The supporting leg 12 is rotatable relative to the supporting frame 11, and the supporting leg 12 can be rotated to different angles under different use requirements, for example, the supporting leg 12 is retracted and is only supported by the supporting frame 11; for example, the supporting legs 12 and the supporting frame 11 are at the same height, and the supporting frame 11 and the supporting legs 12 support together; for example, the legs 12 are only supported by the support frame 11 when they are screwed down. The supporting legs 12 and the supporting frame 11 are located on the same plane. When this application is used for supporting, it is a line support, supports to the point of single branch now, and the supporting effect of this application is better, stability is stronger. Moreover, the working environment of the bolting machine is not on a flat ground, and the ground is mostly uneven. In this case, the intermediate leg 12 is difficult to adapt to the working environment by adopting a surface support. Therefore, the application has high structural strength and high supporting stability.

Based on the above embodiment, another embodiment is provided, in which the supporting frame 11 is a frame structure. The structural strength of the support frame 11 using the frame structure is good. Preferably, the supporting frame 11 is a rectangular frame structure. Specifically, the supporting frame 11 may be formed by integrally bending a pipe; the support frame 11 may also be formed by connecting four pipes.

Based on the above embodiment, another embodiment is provided, in which a driving device is disposed between the supporting leg 12 and the supporting frame 11, and the driving device works to drive the supporting leg 12 to rotate relative to the supporting frame 11. Specifically, the driving device is a power cylinder 014.

Based on the above embodiment, another embodiment is provided, wherein inverted L-shaped brackets 13 are arranged on two sides of the supporting frame 11, and the L-shaped brackets 13 are fixed on the side walls of the supporting frame 11. The legs 12 are connected to the support frame 11 by means of L-shaped brackets 13. Specifically, the support leg 12 is a long bar-shaped structure, a first end of the support leg 12 is connected with the bottom of the L-shaped bracket 13 through a rotating shaft, and the support leg 12 can rotate around the rotating shaft.

The driving device is connected with the supporting frame 11 through an L-shaped bracket 13. Specifically, the cylinder body of the power cylinder 014 is connected to the top of the L-shaped bracket 13, and the power rod of the power cylinder 014 is rotatably connected to the second end of the leg 12. The cylinder 014 operates to extend or retract the power rod, thereby rotating the legs 12 about the pivot axis.

Based on the above embodiment, another embodiment is provided in which the second end of the leg 12 is bent upward. When the cylinder 014 drives the leg 12 to rotate downward, the second end of the leg 12 becomes the anchor support. The second end of the foot 12 is thus arranged to bend upwards, and the foot 12 is able to maintain a relatively large area of contact with the ground after the foot 12 has been screwed down.

Work platform 15, including work platform 15 support body 41, work platform 15 support body 41 on install third landing leg 16, first landing leg and second landing leg 17 in proper order. Specifically, the third leg 16 and the second leg 17 are of a strut structure.

Based on the above embodiment, another embodiment is provided, in which the first leg is connected to the frame body 41 of the working platform 15, and the first leg is rotatable relative to the frame body 41 of the working platform 15. Specifically, be provided with power device, power device drive first leg is rotatory, realizes the support or accomodate of this application. In the moving process of the anchor rod machine, the anchor rod machine does not need to be supported by the bottom surface in a contact mode, and the first support leg is driven to rotate to store the first support leg in order to avoid collision between the first support leg and the ground.

The second leg 17 or the third leg 16 is connected to the frame body 41 of the working platform 15, and the second leg 17 or the third leg 16 is rotatable relative to the frame body 41 of the working platform 15. In the same way, the power device drives the second support leg 17 or the third support leg 16 to rotate, so as to realize the support or the storage of the application. In the moving process of the bolter, the support is not required to be contacted with the bottom surface, and in this case, in order to avoid collision between the second supporting leg 17 or the third supporting leg 16 and the ground, the second supporting leg 17 or the third supporting leg 16 is driven to rotate, so that the second supporting leg 17 or the third supporting leg 16 is stored.

Example three: an installation mode of an outside bolter:

as shown in fig. 1, 3, 6, and 7, the anchor bar trolley includes:

the rotary seat 1 is arranged on the outer telescopic arm 6, and the rotary seat 1 can rotate around the outer telescopic arm 6 in a first plane;

the swing arm 2 is installed on the rotating seat 1, and the swing arm 2 can rotate around the rotating seat 1 in the plane II; the first plane is vertical to the second plane; the swing arm 2 is provided with a slide rail 10;

a sliding seat 3 mounted on the swing arm 2 and movable along the slide rail 10;

and the mounting seat 4 is used for mounting an outer bolting machine 5, is mounted on the sliding seat 3 and can rotate in the plane three relative to the sliding seat 3.

Furthermore, the rotating seat 1 is connected with the outer telescopic arm 6 through a first rotating shaft, and the axial direction of the first rotating shaft is parallel to the length direction of the outer telescopic arm 6.

Specifically, the rotating base 1 is installed on the outer telescopic arm 6, and the axial direction of the first rotating shaft is parallel to the length direction of the outer telescopic arm 6. Obviously, the first rotation axis is perpendicular to the first plane.

In this application, the length direction of the outer telescopic arm 6 is the advancing or retreating direction of the movement of the anchor rod trolley in the roadway. The telescopic boom works to drive the rotating seat 1 and the outside bolting machine 5 to move forwards and to be matched with the outside bolting machine 5 to work. In a non-working state, the telescopic arm can drive the rotating seat 1 and the outer side anchor rod machine 5 to retreat, and the volume of the whole product is reduced.

The setting of roating seat 1 for outside stock machine 5 is on the vertical face of the flexible arm of perpendicular to, but rotation angle regulation, promptly in the tunnel width scope, can adjust outside stock machine 5's angle, carries out the selection of the positive top surface in tunnel, side top surface position.

Furthermore, the back side surface of the swing arm 2 is connected with the rotating base 1 through a second rotating shaft, and the second rotating shaft is perpendicular to the different surface of the swing arm 2. That is, the second rotation axis is parallel to the first plane, and the second plane is changed along with the rotation of the rotating base 1. The swing arm 2 is rotated about the second pivot axis and the outer bolter 5 can be adjusted to rotate forward or backward. The forward and backward directions here mean that the advancing direction of the anchor bar carriage is forward and the retreating direction of the anchor bar carriage is backward.

Further, the slide rail 10 and the second rotating shaft are disposed on two opposite sides of the swing arm 2. The rotation of the swing arm 2 and the movement of the sliding seat 3 can not interfere with each other, so that the precondition that two actions are carried out simultaneously is met, and the outer side bolting machine 5 can be quickly adjusted to a preset position.

Further, the slide rail 10 is provided along the longitudinal direction of the swing arm 2, the slide base 3 is mounted on the slide rail 10, and the slide base 3 can be moved back and forth along the slide rail 10 by the driving of the power unit.

The arrangement of the sliding rail 10 and the sliding seat 3 on the oscillating arm 2 assists the outward extension of the outer bolter 5. The outside bolter 5 can be retracted again in the non-operating state. Preferably, the length of the outer bolter 5 is adapted to the length of the oscillating arm 2. After the outer side bolter 5 is contracted, the swing arm 2 can be kept almost flush with the outer side bolter, and occupied space is small.

Further, rotating base 1 on still install manned platform 14, manned platform 14 be connected with rotating base 1 through second elevating system.

Specifically, the outer telescopic arm 6 is connected with a mounting rack, one side surface of the mounting rack is connected with the second lifting mechanism and the outer telescopic arm 6, and the other side surface of the mounting rack is connected with the rotating seat 1.

Further, said second lifting mechanism comprises link 016 and hinge frame 017, said hinge frame 017 is disposed at one side of people carrying platform 14, and hinge frame 017 is rotatable with respect to people carrying platform 14. Specifically, people carrying platform 14 may move to a horizontal state, which is a working state of people carrying platform 14, and an operator may stand on people carrying platform 14; manned platform 14 hangs down, vertically lies in one side of roating seat 1, is in the shrink state for manned platform 14 this moment, and the volume of stock platform truck is less.

Further, the connecting rod 016 is a bent L-shaped structure, one end of the connecting rod 016 is connected with the mounting frame, and the connecting rod 016 is rotatable relative to the mounting frame. Specifically, the connecting position of the connecting rod 016 and the mounting frame is located at the lower part of the mounting frame and close to one corner of the inner bolter 22. When the hinge frame 017 is at a low position, the link 016 at one end connected with the mounting frame is in a vertical state, and the link 016 at one end connected with the hinge frame 017 is in a horizontal state. At this time, the operator can easily stand on people carrying platform 14, and connecting rod 016 rotates upwards to drive people carrying platform 14 to move upwards.

Until link 016 is rotated to the extreme position, i.e. link 016 at one end connected to mounting bracket is in the horizontal state, link 016 at one end connected to hinge bracket 017 is in the vertical state, hinge bracket 017 reaches the highest position, i.e. people carrying platform 14 reaches the highest position. The space occupied by the link 016 is the smallest and almost fits outside the rotary seat 1. When it is not desired to use manned platform 14, manned platform 14 is folded downwardly with respect to hinge frame 017 such that manned platform 14 is in an upright position and outboard of link 016. Manned platform 14 is in the state of contracting at this moment, and whole volume is less.

Example four: the swing arm of outside roofbolter that this disclosure provided:

as shown in fig. 8 to 15, the anchor rod fixing device includes a frame body 41, a transmission mechanism and a sliding seat 42, wherein a vertical sliding rail 10 is provided on the frame body 41, the sliding seat 42 is used for installing the outside anchor rod fixing device 5, and the sliding seat 42 slides along the sliding rail 10 under the driving of the transmission mechanism to drive the outside anchor rod fixing device 5 to move, so as to increase the stroke of the outside anchor rod fixing device 5.

Further, the transmission mechanism is provided with an oil cylinder 43 and a second chain 44, the oil cylinder 43 is installed at the bottom of the frame body 41 of the swing arm 2, a first fixed pulley 431 and a second fixed pulley 432 which are spaced are arranged on the oil cylinder 43, and the second chain 44 is installed on the fixed pulleys. Compared with belt transmission, the chain transmission has small pretightening force, so the chain transmission has small shaft pressure, larger transmitted power and higher efficiency, and the chain transmission can work under the conditions of high temperature, low speed, oil stain and the like;

further, the oil cylinder 43 can be extended and retracted to drive the second chain 44 to move integrally, and the second chain 44 is connected to the frame body 41 and the sliding seat 42 of the swing arm 2, respectively, so that the second chain 44 rotates when moving integrally, thereby driving the sliding seat 42 to slide along the slide rail 10.

Further, a first fixed part 421 is arranged at a first node of the second chain 44, and the first fixed part 421 is connected with the sliding seat 42; a second fixed part 411 is arranged on a second node of the second chain 44, the second fixed part 411 is connected with the frame body 41 of the swing arm 2, and the movement direction of the first node is opposite to that of the second node; when the oil cylinder 43 is at the shortest working length, the second node is located at the upper end of the second chain 44, the first node is located at the lower end of the second chain 44, and the slidable stroke of the sliding seat 42 is larger.

Further, the second chain 44 is configured as a roller chain, which has a simple structure, is easy to cut, and is convenient to install and replace, and the first fixing member 421 and the second fixing member 411 are easy to install on the roller chain.

Furthermore, the telescopic cylinder 43 is provided with two single-row roller chains, which can increase the connection strength between the second chain 44 and the frame body 41 and the sliding seat 42, and when one pair of second chains 44 is damaged, the other pair can continue to maintain the operation.

It can be understood that the roller chain can be set as one roller chain or a plurality of roller chains, each roller chain can be set as a single-row roller chain, and can also be set as a multi-row roller chain, the multi-row chain is formed by connecting several common single-row chains with long pin shafts, the bearing capacity of the multi-row chain is in direct proportion to the number of rows, but the more the number of rows is, the more difficult the force applied to each row is to be uniform. Providing multiple pairs of roller chains or using multiple rows of roller chains allows the second chain 44 to withstand greater loads.

Based on the improvement of the above embodiment, the oil cylinder 43 is provided with an adjusting mechanism 45 for adjusting the tightness degree of the second chain 44, the adjusting mechanism 45 can keep the second chain 44 in tension, and prevent the second chain 44 from falling off, and the adjusting mechanism 45 can loosen the second chain 44, so as to facilitate maintenance or replacement of the second chain 44.

Further, the adjusting mechanism 45 comprises an adjusting block and an adjusting bolt, the adjusting block is connected to the head of the oil cylinder 43 through the adjusting bolt in a threaded manner, and the adjusting bolt can adjust the distance between the adjusting block and the telescopic oil cylinder 43.

Further, a first fixed pulley 431 is provided on the adjustment block, a second fixed pulley 432 is provided on the telescopic cylinder 43, and the first fixed pulley 431 and the second fixed pulley 432 are on the same vertical line. The distance between the first fixed pulley 431 and the second fixed pulley 432 can be adjusted by rotating the adjusting bolt, so that the second chain 44 is tightened or loosened.

Compare in prior art, the angle and the position of outside roofbolter during operation in this disclosure are changeed and are adjusted to can enlarge machine-carried roofbolter's working range, promote the operating efficiency.

Example five: a locking mechanism for a people carrying platform:

as shown in fig. 16-21, people carrying platform 14 and hinge frame 017 are respectively provided with connecting holes, and a latch 05 is horizontally installed in the connecting holes, and the latch 05 mounts people carrying platform 14 on hinge frame 017, and enables people carrying platform 14 to rotate relative to hinge frame 017.

Furthermore, the left side and the right side of people carrying platform 14 are provided with two first lock holes 021, hinged frame 017 is provided with two second lock holes 011 matched with first lock holes 021, when people carrying platform 14 is in a horizontal state, first lock holes 021 and second lock holes 011 are in an aligned state, and at the moment, a lock pin 03 is inserted into first lock hole 021 and second lock hole 011, so that people carrying platform 14 can be locked in the horizontal state.

This embodiment is through having set up a pair of assorted lockhole respectively in the left and right sides for locking mechanical system is more stable firm, has effectively prevented manned platform 14 inclines to left side or right side, and manned platform 14's bearing capacity is better.

Furthermore, the inner side of the lock pin 03 is connected with a first chain 04, one end of the first chain 04 is connected to the lock pin 03, and the other end of the first chain 04 is fixed to the hinged frame 017, so that the problem that the lock pin 03 is likely to be lost after being detached when the manned platform 14 is locked by the lock pin 03 in a manner of being matched with a lock hole in the prior art is solved, the lock pin 03 can be prevented from being lost, and the lock pin 03 can be taken immediately when needed, so that the use is more convenient.

Further, both ends of the first chain 04 are directly welded to the locking pin 03 and the hinge frame 017.

Further, the first chain 04 is arranged on the inner sides of the two lock pins 03, the first chain 04 is located reasonably, the occupied size is small, and no influence is caused on people or other mechanisms nearby.

In this embodiment, when people platform 14 falls naturally, the positions of second lock hole 011 and first lock hole 021 are as shown in the figure, and when people platform 14 is adjusted to the horizontal state, first lock hole 021 rotates around bolt 05 until it is aligned with second lock hole 011, and bolt 03 is inserted horizontally.

Further, in this embodiment, the first lock hole 021 is disposed outside the second lock hole 011, and the first chain 04 is provided with an adjusting portion 041, where the adjusting portion 041 has a certain movement space.

More specifically, when the adjusting portion 041 is lifted up, the lock pins 03 on both sides can be driven to simultaneously slide out of the first lock hole 021 without falling out of the second lock hole 011, and at this time, the manned platform 14 naturally falls down to be in a vertically stored state, so that the space is saved; when people carrying platform 14 needs to be unfolded, people carrying platform 14 is firstly adjusted horizontally, so that first lock hole 021 is aligned with second lock hole 011, then adjusting portion 041 is pressed downwards, so that lock pins 03 at two sides are reinserted into first lock hole 021, and locking is realized. The lock pin 03 is always positioned in the second lock hole 011, and compared with the prior art that the lock pin 03 needs to be aligned with the lock hole when the lock pin 03 is inserted every time, the locking mechanism disclosed by the invention is simpler and more convenient to operate.

It can be understood that the first lock hole 021 may also be disposed inside the second lock hole 011, the structures of the lock pins 03 and the first chain 04 are not changed, when the adjusting portion 041 is pulled up, the lock pins 03 on both sides simultaneously slide out of the second lock hole 011 without coming out of the first lock hole 021, the people carrying platform 14 naturally falls down, and when the adjusting portion 041 is pressed down, the first chain 04 extrudes to push the lock pins 03 on both sides to reinsert into the second lock hole 011, so as to achieve locking. Or, the first lock holes 021 may be staggered with the second lock holes 011.

Compared with the prior art, the locking mechanism of the manned platform has the advantages of simple structure, low cost, stability, reliability, simpler and more convenient operation and capability of effectively preventing the lock pin from being lost.

Example six: the monorail four-arm anchor rod trolley provided by the disclosure can be understood by combining the previous embodiments.

As shown in fig. 1-25, the present disclosure provides a monorail four-arm anchor rod trolley, which comprises a hanger rail, a power part, a driving trolley, a carrying trolley, a first lifting mechanism and a working mechanism part, wherein the working mechanism part comprises a working platform 15, and a drill arm device and a support device which are arranged on the working platform 15;

the hanger rail is installed at the top of the roadway, the power part, the driving trolley and the bearing trolley are all installed on the hanger rail, a hydraulic pump station and an electrical system are installed in the power part, the bearing trolley travels along the hanger rail under the driving of the driving trolley, the working platform 15 is connected with the bearing trolley through a first lifting mechanism, and the first lifting mechanism drives the working platform 15 to lift.

Further, the boom device comprises an inner telescopic boom 21 and a corresponding inner bolter 22, and two outer telescopic booms 6 and corresponding outer bolters 5.

Further, the inner telescopic arm 21 and the outer telescopic arm 6 are mounted on the working platform 15.

Further, a third support leg 16, a first support leg and a second support leg 17 are sequentially arranged on the working platform 15, and the second support leg 17 and the auxiliary platform 28 are connected with the inner telescopic arm 21 and can move back and forth along with the inner telescopic arm 21; the structure of the first supporting leg is optimized, so that the stability of the working mechanism part is better during supporting construction.

Further, the stock platform truck is including a top landing leg, a top landing leg is installed on bearing trolley for upwards extend, prop in order to further increase the stability of operating device portion at the tunnel top.

Further, inboard bolter 22 is installed at inboard flexible arm 21 through connecting seat 23, and connecting seat 23 can rotate from top to bottom, and when the stock platform truck of messenger walked, second landing leg 17 can the level forward, and inboard bolter 22 is then the level folding backward, simple structure, and spare part is little, and the shrink volume of folding back whole operating device portion is less.

Further, install roating seat 1 on the flexible arm 6 in the outside, set up swing arm 2 on the roating seat 1, outside bolter 5 is installed on swing arm 2 to roating seat 1, swing arm 2 can be respectively at two mutually perpendicular plane internal rotations, and outside bolter 5's nimble degree is higher, can adapt to different tunnel environment, and simultaneously, the flexible arm 6 in the outside can be fine shrink, avoids the mistake to touch.

Further, be connected with manned platform 14 on the roating seat 1, manned platform 14 liftable to, swing arm 2 can rotate 180 backs, control slide block 3 places the extreme lower position with the stock machine, realizes the construction of bottom plate group stock, and simultaneously, manned platform 14 falls to the extreme lower position, can guarantee constructor's field of vision.

The anchor rod platform truck that this disclosure provided compares prior art, the distance of roofbolter and meeting has been shortened, inboard roofbolter can independently be controlled with outside roofbolter, outside roofbolter activity direction is nimble, outside roofbolter can realize the construction of bottom plate group stock, and the drilling dynamics is big, a plurality of people's in station platform has been set up, and the platform is more convenient about the constructor, a plurality of people's in station platform can move respectively during the construction, the field of vision when ensureing to construct is better.

The present disclosure has been described in detail above, and the principles and embodiments of the present disclosure have been explained herein using specific examples, which are provided only to assist understanding of the present disclosure and the core concepts. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present disclosure without departing from the principle of the present disclosure, and such improvements and modifications also fall within the scope of the claims of the present disclosure.

Claims

1. A monorail four-arm anchor bar trolley, the anchor bar trolley comprising: the lifting device comprises a hanger rail, a power part, a driving trolley, a bearing trolley, a first lifting mechanism and a working mechanism part, wherein the working mechanism part comprises a working platform, a drill boom device and a supporting device which are arranged on the working platform; the drill boom device comprises two inner drill booms and two outer drill booms;

the inner drill boom comprises an inner anchor rod machine, an inner telescopic boom and a connecting seat, wherein the inner anchor rod machine is arranged on the inner telescopic boom through the connecting seat, and the connecting seat can rotate up and down, so that when the anchor rod trolley travels, the inner anchor rod machine can be horizontally folded backwards;

the outer drill boom comprises:

the mounting seat is mounted on the sliding seat and can rotate in the third plane relative to the sliding seat;

the outer anchor rod machine is arranged on the mounting seat;

under the shrink state, the roating seat is rotatory to drive the swing arm and is moved outside telescopic boom top, and the swing arm rotates in two planes to being parallel with outside telescopic boom, and the rotation of sliding seat drives outside stock machine and is parallel with the swing arm, and the sliding seat moves on the swing arm and makes outside stock machine and swing arm be close to each other.

2. A monorail four-arm anchor rod trolley as defined in claim 1, wherein said outer drill boom is further provided with a man-carrying platform, said man-carrying platform being connected to the outer telescopic boom by a second lifting mechanism; the outer telescopic arm is connected with a mounting frame, one side surface of the mounting frame is connected with the second lifting mechanism and the outer telescopic arm, and the other side surface of the mounting frame is connected with the rotating seat; the second lifting mechanism comprises a connecting rod and a hinged frame, the hinged frame is arranged on one side of the manned platform, and the hinged frame can rotate relative to the manned platform.

3. A monorail four-arm anchor trolley as defined in claim 1, wherein said swing arm comprises: support body and drive mechanism, be provided with vertical slide rail on the support body, drive mechanism sets up to hydro-cylinder and chain, and the hydro-cylinder is installed in the bottom of support body, is provided with spaced first fixed pulley, second fixed pulley on the hydro-cylinder, and the chain is installed on the fixed pulley and the chain can rotate, the chain is connected with support body, sliding seat respectively.

4. A monorail four-arm anchor-rod trolley as defined in claim 1, wherein said inboard telescopic arm is provided with a secondary platform, said secondary platform being capable of translating back and forth with the extension and retraction of said inboard telescopic arm.

5. A monorail four-arm anchor-rod trolley as claimed in claim 1, wherein said supporting means are provided on a secondary platform, the bottom of which is provided with a second leg for supporting the ground.

6. A monorail four-arm anchor rod trolley as defined in claim 1, wherein said working platform is provided with a first support leg, said first support leg comprises a support frame and support legs disposed at two sides of said support frame, said support legs are connected with said support frame, said support legs are rotatable relative to said support frame, said support legs and said support frame are disposed on the same plane, and a driving device for driving said support legs to rotate relative to said support frame is disposed between said support legs and said support frame.

7. A monorail four-arm anchor rod trolley as defined in claim 2, wherein two first locking holes are provided on both sides of said man-carrying platform; the anchor rod trolley further comprises a lock pin which is horizontally arranged and used for being inserted into the first lock hole and the second lock hole, so that the manned platform is kept static relative to the hinged frame.

8. A monorail four-arm anchor rod trolley as claimed in claim 7, wherein a chain is connected to the inside of the two lock pins, one end of the chain is connected to the lock pin, the other end of the chain is fixed to the hinge frame, the chain is provided with an adjusting portion, and the chain can drive the lock pins to move inwards by controlling the adjusting portion, so that the lock pins can slide out of the first lock hole or the second lock hole on the outer side, or the chain can extrude the lock pins outwards, so that the lock pins can be inserted into the first lock hole or the second lock hole.

9. A monorail four-arm anchor rod trolley as defined in claim 4, wherein a main platform which cannot move back and forth is further provided on said working platform.