CN111377203A

CN111377203A - Assembly line and turnover trolley for medium and large cabinet bodies of combined air conditioning unit and the like

Info

Publication number: CN111377203A
Application number: CN202010303541.7A
Authority: CN
Inventors: 陈烨; 王中贤; 李红杰
Original assignee: Mcquay Air Conditioning Refrigeration Suzhou Co Ltd
Current assignee: Mcquay Air Conditioning Refrigeration Suzhou Co Ltd
Priority date: 2020-04-17
Filing date: 2020-04-17
Publication date: 2020-07-07

Abstract

The assembly line comprises a guide rail and a group of turnover trolleys which are used in cooperation with the guide rail, are used for bearing cabinet bodies and have the same structure, the turnover trolleys mainly comprise frames, supporting wheels and guide wheels, at least three turnover trolleys are arranged on the assembly line for each cabinet body in a use state, at least one turnover trolley supports the cabinet bodies in a mode that the guide wheels are matched with the guide rail, and the rest turnover trolleys are located on one side or two sides of the guide rail and support the cabinet bodies in a mode that the guide wheels are separated from the guide rail. This scheme adopts the mode of single guide rail with the dolly, has eliminated the risk that the staff slided, alleviates staff's work load, makes the transportation of the large-scale cabinet body, propelling movement light more nimble, improves cleanliness, the security of operation environment, and the cabinet body rolls off the production line fast and does not crowd and account for the assembly space, improves cabinet body assembly efficiency and assembly quality.

Description

Assembly line and turnover trolley for medium and large cabinet bodies of combined air conditioning unit and the like

Technical Field

The invention relates to the technical field of assembly lines of medium and large-sized cabinets, in particular to an assembly line and a turnover trolley of medium and large-sized cabinets such as a combined air conditioning unit.

Background

When the middle-large cabinet body such as a cabinet of a combined air conditioning unit is assembled, assembly line operation is required, a plurality of stations for different assembly operations are arranged in the assembly process after the cabinet body enters an assembly line, and the cabinet body is off line after assembly is finished.

In the prior art, in order to facilitate the transportation and movement of the cabinet 7 during and after the assembly of the large-sized cabinet 7, a generally adopted assembly line is to erect a roller line 9, the roller line 9 can be shown in fig. 1, the roller line 9 is an unpowered roller line, the assembly line starts assembly work after the bottom bracket 8 provided with the cabinet 7 is placed on the roller line 9, the height of the assembly line of the combined air conditioning unit is 400mm, meanwhile, the assembly line roller protrudes out of the platform by 15mm, personnel need to cross over the roller or stand on the roller during operation, after the assembly work is completed on one station, the cabinet 7 is pushed to the next station by assistance of a plurality of personnel, and when the assembled combined air conditioning unit is off line, the transportation needs to be assisted by a forklift.

In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art:

1. because personnel need to cross over the roller or stand on the roller during operation, and the roller of the assembly line is higher than one end of the platform by a distance, the risk of a slideway exists when the personnel stand or walk over, and potential safety hazards are brought to the operators;

2. the combined air conditioning unit cabinet body is large in size and high in weight, so that the combined air conditioning unit cabinet body is relatively labor-consuming in pushing the unpowered roller line body, needs 2 or more persons for assistance, can be pushed by using a forklift even when the cabinet body is heavy, is generally operated for 30 sections every day in the assembly operation of the combined air conditioning unit cabinet body, reduces the pushing efficiency because the pushing time is about 2 minutes per section on average, and meanwhile, the pushing process also needs to pay attention to the mutual coordination among multiple persons so as to avoid overlarge cabinet body deviation;

3. the height of the production line of the combined air conditioning unit is 400mm, namely the height of the working platform of the staff is about 400mm, various accessories and various assembly tools need to be taken in the assembly process, and the staff need to frequently go up and down the production line every day, so that the labor intensity of the staff is increased, and the assembly efficiency is reduced;

4. because the difference in height between the existing assembly line body and the ground is large, when the cabinet body of the combined air conditioning unit is off line, a forklift needs to be used for auxiliary carrying, but a plurality of assembly lines generally share one forklift in a production workshop, so that the cabinet body needs to wait for the forklift when being off line, the dependence on the forklift is high, and the assembly line operation can be slowed down when waiting for the forklift.

In view of this, how to solve the problems of safety risk, low assembly efficiency, high labor intensity, high dependence on a forklift and the like of operators in assembly line production of medium and large cabinets such as a combined air conditioning unit and the like in the prior art becomes a subject to be researched and solved by the invention.

Disclosure of Invention

The invention provides an assembly line and a turnover trolley for medium and large cabinet bodies of a combined air conditioning unit and the like, and aims to solve the problems of safety risk, low assembly efficiency, high labor intensity, high dependence on a forklift and the like of operators in assembly line production of the medium and large cabinet bodies of the combined air conditioning unit and the like in the prior art and realize safe and efficient assembly operation of the medium and large cabinet bodies of the combined air conditioning unit and the like.

In order to achieve the purpose, the invention adopts a technical scheme that: an assembly line of medium and large cabinet bodies such as a combined air conditioning unit comprises a guide rail and a group of turnover trolleys which are matched with the guide rail, used for bearing the cabinet bodies and have the same structure;

the turnover trolley mainly comprises a frame, supporting wheels and guide wheels, wherein the frame is a bearing platform, a limiting seat for positioning a cabinet body is arranged on the bearing platform, at least one guide wheel and at least three supporting wheels are arranged below the bearing platform, the supporting wheels are positioned on two sides or one side of a guiding central line of the guide wheels relative to a supporting point of the bearing platform, and the supporting wheels are universal wheels;

in a use state, at least three turnover trolleys are arranged on an assembly line of each cabinet body, wherein at least one turnover trolley supports the cabinet body in a mode that the guide wheels are matched with the guide rails, and the rest turnover trolleys are positioned on one side or two sides of the guide rails and support the cabinet body in a mode that the guide wheels are separated from the guide rails.

Furthermore, in order to enable the turnover trolley to be used for bearing and positioning cabinet bodies of various specifications, a plurality of adjusting holes are formed in the frame and are distributed along the upper surface of the frame at intervals, and the limiting seat is installed on the frame through the matching of a fastening piece and the adjusting holes.

Further, in order to let spacing seat fix a position the cabinet body better, spacing seat has spacing portion, contain in the spacing portion and be used for carrying out spacing outer spacing portion, be used for carrying out spacing interior spacing portion to one side inwards of the cabinet body to the outside one side of the cabinet body, form spacing space between outer spacing portion and the interior spacing portion.

Further, in order to strengthen the universality of the trolley for turnover, the trolley is convenient to limit the cabinet body, the limit space on the limit seat is of a cross-shaped opening structure, and the bracket at the bottom of the cabinet body in six directions can be limited, namely the northeast, the southeast, the northwest, the southwest and the east-west directions and the northwest directions.

Furthermore, in order to facilitate the gap adjustment of the limiting space in the limiting seat, the limiting seat comprises four limiting blocks, the upper parts of the limiting blocks are right-angled or semicircular, and the four limiting blocks are arranged on the upper surface of the frame in an array mode and form the limiting space in a cross-shaped opening structure.

The invention also discloses a transfer trolley of medium and large-sized cabinets such as a combined air conditioning unit and the like, which is characterized in that the transfer trolley is used for forming an assembly line in the scheme, and comprises a frame, supporting wheels and guide wheels, wherein the frame is a bearing platform, a limiting seat for positioning the cabinet is arranged on the bearing platform, at least one guide wheel and at least three supporting wheels are arranged below the bearing platform, the supporting wheels are positioned on two sides or one side of a guide center line of the guide wheels relative to supporting points of the bearing platform, and the supporting wheels are universal wheels.

Furthermore, in order to enable the guiding function of the guide wheels to be better exerted and enable the guide wheels to be more accurate and stable, the number of the guide wheels is two, and the two guide wheels are located in the same extension direction of the advancing direction of the turnover trolley.

Furthermore, in order to ensure that the turnover trolley is more stable and more convenient and labor-saving when in operation and pushed, the number of the supporting wheels is four, the four supporting wheels are respectively arranged at four corners of the lower surface of the trolley frame and are universal wheels, and locking blocks are arranged on the supporting wheels.

The invention is explained below:

1. in the present invention, the directional descriptions of "east", "south", "west", "north" refer to the orientation or positional relationship that the spacing block is placed in the horizontal direction and is based on the drawings, and are only for convenience of describing the present application and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application;

2. in the invention, the meaning of "outward" in "outward" refers to the direction of the cabinet body in the outward direction; the meaning of "inward" in "refers to the direction of the cabinet body in the inward direction, namely the outward side or inward side of the bottom bracket at one side of the cabinet body;

3. in the present invention, the terms "below" and "above" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for convenience of describing the present application and simplifying the description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application, such as mounting the support wheel under the frame, in which case the present invention does not limit the support wheel to be mounted just under the frame, as long as the contact surface of the support wheel with the ground is lower than the frame, and is equivalent to mounting the support wheel under the frame.

Due to the application of the scheme, compared with the prior art, the invention has the following advantages and effects:

1. according to the scheme, the mode of adding the trolley by the guide rail is adopted, the bottom of the cabinet body is only the height of the trolley for turnover, staff do not need to cross or stand on a roller line for operation, and can directly stand on the ground for operation, so that the risk of slipping of the roller is eliminated; because of no height drop, the staff does not need to walk up, down and up, the working strength is correspondingly reduced, and therefore, more portable live tools without wires can be used for working, the number of cables and cables around is reduced, the cleanliness and the safety of the working environment are improved, and the assembly efficiency and the assembly quality of the cabinet body are improved;

2. in the scheme, the mode that the cabinet bodies are loaded by the plurality of turnover trolleys is adopted, the turnover trolleys can be used for loading medium-large sized cabinet bodies with large volume and large weight of the combined air conditioning unit, so that the transfer and pushing of the medium-large sized cabinet bodies are lighter and more flexible, one person can easily push the trolleys loaded with the cabinet bodies to move along the direction of the guide rail, and a plurality of persons do not need to cooperatively arrange to use a forklift for assisting the pushing, so that a great amount of time is saved; the turnover trolley with the same structure has more flexible universality, the same turnover trolley can be used in a plurality of directions, the same turnover trolley can meet the loading and using requirements of most cabinet bodies, the turnover trolley can be used without adjustment for the conventional cabinet bodies, the size of the gap of a limiting space can be adjusted by adjusting the position of a limiting seat in an adjusting hole for cabinet bodies with different specifications of a bottom support, and the transferring and pushing requirements of the cabinet bodies with different specifications and sizes are met;

3. in the scheme of the invention, the guide rail is laid on one side of the area in the assembly workshop, the middle-large cabinet bodies such as the combined air conditioning unit and the like can be pushed along the direction of the guide rail, the one-side limiting mode can keep the one side parallel and level, all the cabinet bodies on the assembly line ensure the whole effect to be straight, and the field 5S is effectively improved;

4. according to the scheme, the cabinet body can be directly pushed to the offline area without waiting for a forklift when being assembled and offline, the forklift is not required to be relied on, the transportation of the forklift and the offline of the cabinet body are not interfered with each other, the rapid offline does not occupy the assembly space, the time and the tools are saved, and the cabinet body assembly efficiency is improved.

Drawings

FIG. 1 is a schematic representation of a prior art roller line;

FIG. 2 is a schematic diagram of an assembly line according to an embodiment of the present invention;

FIG. 3 is an enlarged partial schematic view of FIG. 2;

FIG. 4 is a schematic view of the operation of an assembly line according to an embodiment of the present invention;

FIG. 5 is a schematic perspective view of a cart for turnaround according to an embodiment of the present invention;

FIG. 6 is an exploded view of the cart for turnaround in accordance with the embodiment of the present invention;

FIG. 7 is a schematic perspective view of the present invention with the cart turned over for turnaround;

FIG. 8 is a top view of a cart for turnaround use in accordance with an embodiment of the present invention;

FIG. 9 is a right side view of the cart for turnaround use in accordance with the embodiment of the present invention;

FIG. 10 is a front view of the cart for turnaround use in accordance with the embodiment of the present invention;

FIG. 11 is a bottom view of the cart for turnaround use in accordance with the embodiment of the present invention.

The drawings are shown in the following parts:

100-turnover trolley; 1-a vehicle frame; 11-a conditioning aperture; 2-a limiting seat; 201-external limiting part; 202-an inner limiting part; 21-a limiting block; 211-a spacing space; 3-a guide wheel; 4-a support wheel; 5-a locking block;

6-a guide rail;

7-a cabinet body; 8-bottom support; 9-roller line.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and embodiments, wherein for convenience of description, fig. 2, fig. 3 and fig. 4 are schematic diagrams of a medium-large cabinet 7 and a bottom bracket 8 of the cabinet 7, and it should be noted that the cabinet 7 and the bottom bracket 8 do not belong to the parts of the turnover trolley and the assembly line of the embodiment of the present invention.

Example (b): the present disclosure will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the disclosure may be shown and described, and which, when modified and varied by the techniques taught herein, can be made by those skilled in the art without departing from the spirit and scope of the disclosure.

Example one

As shown in fig. 2 and fig. 3, an assembly line for medium and large cabinets such as a combined air conditioning unit is disclosed in an embodiment of the present invention, and includes a guide rail 6 and a set of turnover trolleys 100 which are used in cooperation with the guide rail 6, are used for carrying cabinets 7, and have the same structure;

as shown in fig. 5 to 11, the turnover trolley mainly comprises a frame 1, supporting wheels 4 and guiding wheels 3, wherein the frame 1 is a bearing platform, a limiting seat 2 for positioning a cabinet body 7 is arranged on the bearing platform, at least one guiding wheel 3 and at least three supporting wheels 4 are arranged below the bearing platform, the supporting wheels 4 are located on two sides or one side of a guiding center line of the guiding wheels 3 relative to a supporting point of the bearing platform, and the supporting wheels 4 are universal wheels;

in a use state, at least three turnover trolleys 100 are arranged on an assembly line for each cabinet body 7, wherein at least one turnover trolley 100 supports the cabinet body 7 in a mode that the guide wheels 3 are matched with the guide rails 6, and the rest turnover trolleys 100 are positioned on one side or two sides of the guide rails 6 and support the cabinet body 7 in a mode that the guide wheels 3 are separated from the guide rails 6.

Example two

As shown in fig. 5 to 11, a second embodiment of the present invention provides a transfer cart for a medium-sized and large-sized cabinet 7 of a combined air conditioning unit, etc., the transfer cart 100 includes a cart frame 1, guide wheels 3 and support wheels 4, the cart frame 1 is a carrying platform, the cart frame 1 is provided with a plurality of adjusting holes 11 arranged at intervals along the upper surface of the cart frame 1, the carrying platform is provided with a limiting seat 2 for positioning the cabinet 7, the limiting seat 2 is arranged on the upper surface of the cart frame 1, the limiting seat 2 is mounted on the cart frame 1 by a fastening member and the adjusting holes 11 in a matching manner, the position of the limiting seat 2 can be adjusted in the adjusting holes 11 according to actual requirements, the limiting seat 2 is provided with a limiting portion, the limiting portion includes an outer limiting portion 201 for limiting an outward side of a bottom bracket 8 of the cabinet 7, and an inner limiting portion 202 for limiting an inward side of the bottom bracket 8 of the cabinet 7, a limiting space 211 is formed between the outer limiting part 201 and the inner limiting part 202, the position of the limiting seat 2 can be adjusted in the adjusting hole 11 according to actual requirements, so that the gap of the limiting space 211 is adjusted, and the outer limiting part 201 and the inner limiting part 202 alternate with each other along with the change of the pushing use direction of the turnover trolley; the supporting wheels 4 and the guide wheels 3 are mounted on the lower surface of the frame 1 through fasteners, the number of the guide wheels 3 is at least one, and the number of the supporting wheels 4 is at least three.

In order to prevent the forward directions of the supporting wheel 4 and the guide wheel 3 from interfering in the using process of the turnover trolley, the installation part of the supporting wheel 4 is far away from the extension line of the guide wheel 3 in the forward direction of the turnover trolley, the supporting point of the supporting wheel 4 relative to the bearing platform is positioned on two sides or one side of the guiding central line of the guide wheel (3), and the supporting wheels 4 are positioned on the same plane.

In order to guarantee that the cabinet body 7 can not be pushed away along with the turnover trolley on the assembly station, if the displacement takes place then can bring the potential safety hazard to the assembly worker, the cabinet body 7 when assembling this moment, locking block 5 has on supporting wheel 4, be used for locking supporting wheel 4 to make turnover trolley 100 can not take place the displacement, untie locking block 5 when treating the propelling movement that needs can, this locking block 5 is optional accessory in the universal wheel, therefore do not describe too much, of course, can be on leading wheel 3, do the locking part on frame 1, be the simple replacement of this scheme.

The trolleys 100 for turnover in the second use embodiment can be used for loading medium and large cabinet bodies 7 with large volume and large weight of the combined air conditioning unit, so that the transportation and pushing of the medium and large cabinet bodies 7 are more portable and flexible, the trolleys 100 for turnover with the structure have more flexible universality, the same trolleys 100 for turnover can be used in a plurality of directions, the same trolleys 100 for turnover can meet the loading and using requirements of most cabinet bodies 7, the trolleys 100 for turnover can be used without adjustment for the conventional cabinet bodies 7, the sizes of gaps of the limiting spaces 211 can be adjusted for cabinet bodies 7 with different specifications of the bottom support 8, and the transportation and pushing requirements of the cabinet bodies 7 with different specifications and sizes can be met by adjusting the positions of the limiting seats 2 in the adjusting holes 11.

The working process of the assembly line and the turnover trolley of the middle-large cabinet body such as the combined air conditioning unit and the like in the embodiment of the invention refers to the following steps:

in specific use, as shown in fig. 11, taking four turnover trolleys 100 in a group of trolleys 100 as an example, four corners of a bottom bracket 8 of a cabinet 7 are respectively mounted on limiting seats 2 of the four turnover trolleys 100 before assembly production, so that the cabinet 7 can be pushed by an operator on the same plane, at this time, two turnover trolleys 100 are mounted on a guide rail 6, when an assembly line starts production, the cabinet 7 can be pushed to a first assembly station by an operator, after the cabinet 7 reaches the first assembly station along the guide rail 6, the cabinet 7 is fixed to start assembly, after assembly is completed, the cabinet 7 is in a movable state, then the cabinet 7 is pushed to a next assembly station, and so on, assembly operation of a large-sized cabinet 7 in a combined air conditioner group and the like is completed, after all assembly operations are completed, the cabinet 7 is taken off line, at this time, one operator can push the cabinet 7 to a designated position by the turnover trolleys 100 and the guide rail 6 Location.

Through the implementation of the technical scheme, compared with the prior art, the embodiment of the invention adopts a mode of adding the trolley into the guide rail 6, the special turnover trolley 100 and the corresponding guide rail 6 are designed, the guide rail 6 is laid on one side of the area in the assembly workshop, and the middle-large cabinet bodies 7 such as the combined air conditioning unit and the like can be pushed along the direction of the guide rail 6, and due to the structural design of the turnover trolley 100, the cabinet bodies 7 on the turnover trolley 100 can be pushed easily, so that one worker can complete the pushing of the cabinet bodies 7 by adopting the scheme, and a large amount of time can be saved; because the bottom height of the cabinet body 7 is only the height of the turnover trolley 100, assembly staff can directly stand on the ground for operation, and the assembly is more labor-saving and safer; when the assembly is finished and the wire is off-line, the forklift does not need to wait, the wire can be directly pushed to the off-line area, and the time can be saved. Use 30 sections of average daily operation in the general combined type air conditioning unit cabinet body 7 assembly operation as an example, the time of originally carrying out the propelling movement to the cabinet body 7 of one section station by a plurality of staff is about 2 minutes, and the time of waiting for fork truck when the cabinet body 7 has been assembled to the line of unloading is about 2 minutes, and has adopted above-mentioned technical scheme after, the propelling movement is all saved daily: 30 segments by 2 minutes/segment =60 minutes, waiting for the forklift day to save: segment 30 x 2 min/segment =60 min.

With respect to the first and second embodiments described above, possible variations of the present invention are described as follows:

1. in the above embodiments, as shown in fig. 6 and 7, at least one guide wheel 3 is installed on the lower surface of the frame 1, but the embodiment of the present invention is not limited thereto, and two guide wheels 3 are preferred, so that the guiding function of the guide wheels 3 can be better exerted, the guiding is more accurate and more stable, and of course, other guide wheels 3 can be selected, and the guiding function can also be realized;

2. in the above embodiment, as shown in fig. 5 and 8, the limiting space 211 on the limiting seat 2 is a cross-shaped opening structure, and can limit and support the bottom bracket 8 in six directions, more specifically, the limiting seat 2 includes four limiting blocks 21, the upper portions of the limiting blocks 21 are right-angled or semicircular, the four limiting blocks 21 are arranged on the upper surface of the frame 1 in an array to form the limiting space 211 in the cross-shaped opening structure, and as an example, four trolleys 100 for circulation in a group of trolleys are provided, and the schematic view after the bottom bracket 8 is installed in the limiting seat 2 is shown in fig. 2 and 3. At this time, it is explained later that the position of the position limiting seat 2 is placed in the horizontal direction in fig. 8, four corners of the bottom support 8 can be placed at will in the position limiting space 211 of the position limiting seat 2 of the turnover trolley 100, the four corners can correspond to the northeast, southeast, northwest and southwest directions, and of course, the middle section of the bottom support 8 can also be supported and transported by the turnover trolley 100, and the position where the middle section of the bottom support 8 is placed is the east-west direction or the south direction. However, the embodiment of the present invention is not limited thereto, and the barrier plate disposed in the center of the cross-shaped open structure can also achieve the limit of the bottom bracket 8 in multiple orientations, which can be understood and accepted by those skilled in the art; further explaining the state that the outer limiting part 201 and the inner limiting part 202 alternate with each other along with the pushing use direction change of the turnover trolley or the different positions of the bottom support 8, after the turnover trolley is loaded on the bottom support 8, as shown in fig. 2 and 3, four turnover trolleys 100 are installed below the bottom support 8 in fig. 2, and the four turnover trolleys 100 can be replaced for use, so that the outward limiting part or the inward limiting part of the bottom support 8 can be replaced as the limiting part in the limiting of the bottom support 8, and the limiting seat 2 on one turnover trolley at least limits the bottom support 8 in two directions, so that the limiting is stable, firm, safe and reliable;

3. in the above embodiment, as shown in fig. 4 and 8, the number of the support wheels 4 is at least three, and the three support wheels 4 located on the same plane can stably support the frame 1, so as to stabilize the operation of the frame 1, but the embodiment of the present invention is not limited thereto, and in order to make the operation of the turnover trolley 100 more stable and more convenient and labor-saving during pushing, the number of the support wheels 4 is preferably four, and the four support wheels 4 are respectively arranged at four corners of the lower surface of the frame 1; the supporting wheel 4 adopts a universal wheel, so that the universality and the flexibility are improved.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides an assembly line of large-scale cabinet body such as modular air conditioning unit which characterized in that: the assembly line comprises a guide rail (6) and a group of turnover trolleys (100) which are matched with the guide rail (6) and used for bearing the cabinet body (7) and have the same structure;

the turnover trolley (100) mainly comprises a trolley frame (1), supporting wheels (4) and guide wheels (3), wherein the trolley frame (1) is a bearing platform, a limiting seat (2) for positioning a cabinet body (7) is arranged on the bearing platform, at least one guide wheel (3) and at least three supporting wheels (4) are arranged below the bearing platform, supporting points of the supporting wheels (4) relative to the bearing platform are positioned on two sides or one side of a guiding central line of the guide wheels (3), and the supporting wheels (4) are universal wheels;

in a use state, at least three turnover trolleys (100) are arranged on an assembly line for each cabinet body (7), wherein at least one turnover trolley (100) supports the cabinet body (7) in a mode that the guide wheels (3) are matched with the guide rails (6), and the rest turnover trolleys (100) are positioned on one side or two sides of the guide rails (6) and support the cabinet body (7) in a mode that the guide wheels (3) are separated from the guide rails (6).

2. The assembly line of claim 1, wherein: the frame (1) is provided with a plurality of adjusting holes (11) which are distributed at intervals along the upper surface of the frame (1), and the limiting seat (2) is installed on the frame (1) through a fastener and the adjusting holes (11) in a matched mode.

3. The assembly line of claim 2, wherein: spacing seat (2) have spacing portion, including being used for carrying out spacing outer spacing portion (201) to the outside one side of the cabinet body (7), being used for carrying out spacing interior spacing portion (202) to the inside one side of the cabinet body (7), form spacing space (211) between outer spacing portion (201) and interior spacing portion (202).

4. The assembly line of claim 3, wherein: spacing space (211) on spacing seat (2) are cross open-shaped structure, can be right six directions of the cabinet body (7) are spacing, are northeast, southeast, northwest, southwest direction and east, south and west direction respectively.

5. The assembly line of claim 3, wherein: the limiting seat (2) comprises four limiting blocks (21), the upper parts of the limiting blocks (21) are right-angled or semicircular, and the limiting blocks (21) are arranged on the upper surface of the frame (1) in an array mode to form limiting spaces (211) in a cross-shaped opening structure.

6. The utility model provides a dolly is used in turnover of large-scale cabinet body such as modular air conditioning unit which characterized in that: the turnover trolley (100) is used for forming the assembly line of any one of claims 1 to 5, the turnover trolley (100) comprises a frame (1), supporting wheels (4) and guide wheels (3), wherein the frame (1) is a bearing platform, a limiting seat (2) for positioning a cabinet body (7) is arranged on the bearing platform, at least one guide wheel (3) and at least three supporting wheels (4) are installed below the bearing platform, the supporting wheels (4) are located on two sides or one side of a guide center line of the guide wheels (3) relative to supporting points of the bearing platform, and the supporting wheels (4) are universal wheels.

7. The turnaround cart of claim 6, wherein: the number of the guide wheels (3) is two, and the two guide wheels (3) are positioned in the same extension direction of the advancing direction of the turnover trolley (100).

8. The turnaround cart of claim 7, wherein: the number of the supporting wheels (4) is four, and the four supporting wheels (4) are respectively arranged at four corners of the lower surface of the frame (1).

9. The turnaround cart of claim 8, wherein: the supporting wheel (4) is provided with a locking block (5).