Three-side connecting unit and study desk

Abstract

The utility model belongs to the technical field of furniture accessories, and particularly relates to a three-face connecting unit and a study desk, the three-face connecting unit comprises a top plate, a vertical plate and a connecting plate, the connecting plate is fixedly connected with a side plate, the vertical plate is fixedly connected with a mounting frame, the vertical plate is fixedly connected with a rear plate, and the rear plate is fixedly connected with the top plate. The vertical plate, the top plate and the connecting plate are made of metal and integrally formed through casting, every two of the vertical plate, the top plate and the connecting plate are perpendicular to each other, and the connecting units are designed in a three-axis interactive mode and can be stably matched with support corner mounting positions of the learning table, all components of the learning table support are rapidly connected, the mounting efficiency of the learning table is improved, and the learning table is convenient to use. And enterprise development is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to furniture accessory technical field, especially, it relates to a three -dimensional connection unit and study desk. BACKGROUND

[0002] The study desk is a study auxiliary tool made through data collection, test and demonstration according to the research of ergonomics, human mechanics, human physiology and so on, in combination with human visual principle, chromatics, psychology and so on. It is suitable for children to adolescents of 3-18 years old, has the characteristics of highly adjustable lifting and desk surface free tilting, aims at providing a learning environment in line with ergonomics, and protecting the vision and spine health of children.

[0003] The traditional study desk includes a support and a desk plate, the support is designed in a split type, includes a top frame, a side plate and a back plate, the side plate is away from the ground through a support leg, the top frame is connected to the top end of the side plate, the back plate is arranged on the side wall edge of the side plate, and the top frame, the side plate and the back plate are fixed in pairs through L-shaped plates, the number of the L-shaped plates is at least two groups, the structure is complex, and the installation is cumbersome, and improvement is urgently needed. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a three -dimensional connection unit and study desk, aims at solving the technical problem that the top frame, the side plate and the back plate in the prior art study desk are fixed in pairs through L-shaped plates, the number of L-shaped plates is at least two groups, the structure is complex, and the installation is cumbersome.

[0005] To achieve the above-mentioned purpose, the utility model embodiment provides a three -dimensional connection unit, including top plate, stand and connecting plate, the connecting plate is fixedly connected with the side plate, the stand is fixedly connected with the mounting frame, the stand is fixedly connected with the back plate, the stand, the top plate and the connecting plate are integrally formed by casting with metal, and the stand, the top plate and the connecting plate are vertically arranged in pairs.

[0006] Optionally, the area of the connecting plate is much larger than that of the stand, the area of the connecting plate is larger than that of the top plate, and the connecting plate is arranged in a vertical state.

[0007] Optionally, mounting holes are arranged on the stand, the top plate and the connecting plate.

[0008] Optionally, a clearance slot for avoiding the height adjusting rod of the support is arranged on the connecting plate.

[0009] To achieve the above-mentioned purpose, the utility model embodiment provides a study desk, which comprises the three -dimensional connection unit.

[0010] Optionally, the learning desk further comprises a rotating desk board and a driving assembly, the edge of the rotating desk board is rotationally connected to the support, the driving assembly is arranged in the support, and the output end of the driving assembly is drivingly connected to the rotating desk board; wherein the driving assembly comprises a connecting seat and an extension piece, the connecting seat is fixedly arranged on the support, the output end of the extension piece is rotationally connected to the end face of the rotating desk board, the end of the connecting seat away from the extension piece is provided with an L-shaped welding groove, the edge of the L-shaped welding groove is fixedly welded to the support, and the rotation fixed point of the rotating desk board is arranged in a staggered manner with the connecting seat.

[0011] Optionally, the support comprises a support leg, a side plate and a mounting frame, the number of the support leg and the side plate is two groups, one of the two groups of side plates is connected to the corresponding support leg, and the mounting frame is mounted between the two groups of side plates; the edge of the L-shaped welding groove is fixedly welded to the inner ring side wall of the mounting frame.

[0012] Optionally, the mounting frame is arranged in a rectangular ring structure, and the rotating desk board is rotationally connected to the mounting frame through a rotating seat; wherein the number of the rotating seat is two groups, the two groups of rotating seats are sequentially and spacedly arranged along the length direction of the edge of the mounting frame, the top end of the rotating seat is fixedly connected to the desk board, and the side wall of the rotating seat is fixedly connected to the edge of the mounting frame.

[0013] Optionally, the rotating seat comprises a fixed block and a connecting block, the end of the connecting block is rotationally connected to the fixed block, the fixed block is arranged in a shape structure, the end of the connecting block is rotationally connected to the inner groove of the fixed block, the top end of the fixed block is fixedly connected to the desk board, wherein the body of the fixed block is arranged in an axle body structure, the top end of the fixed block is arranged in a flat plate structure, and the top end of the fixed block is arranged in parallel with the end face of the desk board.

[0014] Optionally, the support further comprises a fixed desk board, the fixed desk board is arranged in an L-shaped structure, the area of the fixed desk board is greater than that of the rotating desk board, the fixed desk board is fixedly connected to the edge of the mounting frame away from the rotating desk board, the rotating desk board can be rotated to be flush with the fixed desk board, and when the fixed desk board and the rotating desk board are parallel, the sum of the areas of the fixed desk board and the rotating desk board is equal to the area of the inner ring of the mounting frame.

[0015] The three-side connecting unit and the learning desk provided by the embodiment of the utility model have at least one of the following technical effects: when installing the support, the three-side connecting unit is placed between the side plate, the installation frame and the back plate first, the connecting plate, the vertical plate and the top plate are respectively and one by one pasted on the side plate, the installation frame and the back plate, and then fixed through the screw; compared with the prior art, the installation frame, the back plate and the side plate need to be connected through at least two groups of connecting frames, the technical problem of complex structure, reduced installation efficiency and high installation complexity exists, the three-side connecting unit provided by the embodiment of the utility model is designed along three axes, can be stably fitted in the support corner installation position of the learning desk, and can quickly connect each component of the learning desk support, improves the installation efficiency of the learning desk, and is beneficial to enterprise development. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0017] Figure 1 The structure schematic diagram of the learning desk provided by the embodiment of the utility model.

[0018] Figure 2 The structure explosion diagram of the learning desk in Figure 1 .

[0019] Figure 3 The enlarged view of A in Figure 2 .

[0020] Figure 4 The side sectional view of the learning desk provided by the embodiment of the utility model.

[0021] Figure 5 The side sectional view of the learning desk provided by the embodiment of the utility model.

[0022] Figure 6 The structure schematic diagram of the three-side connecting unit provided by the embodiment of the utility model.

[0023] Figure 7 The structure schematic diagram of the installation back plate provided by the embodiment of the utility model.

[0024] Figure 8 The enlarged view of B in Figure 7 .

[0025] Figure 9 The rear view of the learning desk provided by the embodiment of the utility model.

[0026] Wherein, the reference signs in the figures:

[0027] 100 - support 200 - rotating table plate 300 - driving assembly

[0028] 310 - connecting seat 320 - telescopic piece 330 - L-shaped welding groove

[0029] 110 - foot 120 - side plate 130 - mounting frame

[0030] 400 - rotating seat 140 - back plate 500 - three-face connecting unit

[0031] 510 - vertical plate 520 - top plate 530 - connecting plate

[0032] 540 - mounting hole 550 - clearance slot 410 - fixing block

[0033] 420 - connecting block 600 - fixed table plate 700 - storage rack

[0034] 710 - mounting back plate 720 - mounting frame 730 - storage box

[0035] 711 - first base plate 712 - second base plate 713 - first tooth part

[0036] 714 - second tooth part 715 - screw hole 716 - straight edge

[0037] 800 - supporting rib 250 - handle 920 - sliding pocket plate

[0038] 900 - drawer assembly 910 - sliding rail DETAILED DESCRIPTION

[0039] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments are described below by referring to the accompanying drawings, and the embodiments are described in the order of the drawings. Figures 1-9 The embodiments described are exemplary, and are intended to explain the embodiments of the present application, and cannot be understood as a limitation of the present application.

[0040] In the description of the embodiments of the utility model, it is understood that the directions or position relations indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the directions or position relations shown in the drawings, and are only for the convenience of describing the embodiments of the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the utility model.

[0041] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0042] In the embodiments of the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the communication inside two elements or the interaction relationship between two elements.

[0043] In one embodiment of the utility model, as shown in Figures 1-9 A learning table is provided, which comprises a support 100, a rotating table plate 200 and a driving assembly 300, the edge of the rotating table plate 200 is rotatably connected to the support 100, the driving assembly 300 is arranged in the support 100, the output end of the driving assembly 300 is drivingly connected with the rotating table plate 200, wherein the driving assembly 300 comprises a connecting seat 310 and a telescopic piece 320, the connecting seat 310 is fixedly arranged on the support 100, the output end of the telescopic piece 320 is rotatably connected with the end face of the rotating table plate 200, the end portion of the connecting seat 310 away from the telescopic piece 320 is provided with an L-shaped welding groove 330, the connecting seat 310 is fixedly welded with the support 100 through the edge of the L-shaped welding groove 330, and the rotation fixed point of the rotating table plate 200 is arranged in dislocation with the connecting seat 310.

[0044] As shown in Figures 1-9As shown in the utility model, in another embodiment of the utility model, the support 100 includes a support leg 110, a side plate 120 and a mounting frame 130, the number of the support leg 110 and the side plate 120 is two groups, two groups of side plate 120 are connected one by one on the corresponding support leg 110 respectively, the mounting frame 130 is installed between two groups of side plate 120, and the edge of the L-shaped welding groove 330 is fixedly welded with the inner ring side wall of the mounting frame 130. The L-shaped welding groove 330 structure is favorable for improving the connection stability between the mounting frame 130 and the connecting seat 310.

[0045] As Figures 1-9 As shown in the utility model, in another embodiment of the utility model, the mounting frame 130 is arranged in a rectangular ring structure, the rotating table plate 200 is rotationally connected with the mounting frame 130 through a rotating seat 400, wherein the number of the rotating seat 400 is two groups, two groups of rotating seat 400 are sequentially and spacedly distributed along the length direction of the edge of the mounting frame 130, the top end of the rotating seat 400 is fixedly connected with the rotating table plate 200, and the side wall of the rotating seat 400 is fixedly connected with the edge of the mounting frame 130. The two groups of rotating seat 400 are favorable for improving the connection stability of the rotating table plate 200.

[0046] As Figures 1-9 As shown in the utility model, in another embodiment of the utility model, the support 100 further includes a back plate 140 and a three-face connecting unit 500, the back plate 140 is arranged between two groups of side plate 120 and below the mounting frame 130, and the three-face connecting unit 500 is arranged between the back plate 140, the side plate 120 and the mounting frame 130, wherein the three-face connecting unit 500 includes a top plate 520, a vertical plate 510 and a connecting plate 530, the connecting plate 530 is fixedly connected with the side plate 120, the vertical plate 510 is fixedly connected with the mounting frame 130, the vertical plate 510 is fixedly connected with the back plate 140, the vertical plate 510, the top plate 520 and the connecting plate 530 are integrally formed by casting, and the vertical plate 510, the top plate 520 and the connecting plate 530 are perpendicularly arranged two by two.

[0047] Specifically, when installing the support 100, first, the three-side connecting unit 500 is placed between the side plate 120, the mounting frame 130 and the back plate 140, so that the connecting plate 530, the vertical plate 510 and the top plate 520 are respectively and one-to-one attached to the side plate 120, the mounting frame 130 and the back plate 140, and then fixed by screws. Compared with the prior art, the mounting frame 130, the back plate 140 and the side plate 120 need to be connected by at least two groups of connecting frames, which has the technical problems of complex structure, low installation efficiency and high installation complexity. The three-side connecting unit 500 provided in the embodiment of the utility model is designed along three axes, can be stably fitted in the corner installation position of the support 100 of the study desk, and quickly connects each component of the study desk support 100, thereby improving the installation efficiency of the study desk and being beneficial to enterprise development.

[0048] When the inclination angle of the rotating desk plate 200 needs to be adjusted, the user drives the telescopic piece 320 to work, the output end of the telescopic piece 320 extends along a preset direction, since the connecting seat 310 and the edge of the rotating desk plate 200 are arranged in a staggered manner, in the extension or retraction process of the output end of the telescopic piece 320, the rotation path of the output end of the telescopic piece 320 is telescoped by the length of the preset direction, which can adapt to the rotation path of the linking point of the rotating desk plate 200 and the output end of the telescopic piece 320, thereby realizing the inclination adjustment of the driving control of the rotating desk plate 200, wherein the telescopic piece 320 is a pneumatic cylinder, an electric cylinder or a hydraulic cylinder, and the angle can be accurately adjusted by controlling the adjustment amount of the telescopic piece 320; in the prior art, the desk plate positioning structure mostly only uses a simple U-shaped rotating frame as a support body, the structure has a limited adjustment adaptability for the interval of the angle adjustment, and the frame structure is thin, which easily causes the desk plate to shake and is inconvenient to use; the study desk provided in the embodiment of the utility model can realize convenient angle adjustment by using a single telescopic piece 320, the adjustment effect is not limited by the gear position, can accurately meet the needs of the user, and effectively improves the practicality of the study desk.

[0049] As shown in Figures 1-9 In another embodiment of the utility model, the area of the connecting plate 530 is much larger than the vertical plate 510, the area of the connecting plate 530 is larger than the top plate 520, and the connecting plate 530 is arranged in a vertical state. The large-area connecting plate 530 can effectively improve the connection stability of the three-side connecting unit 500 and the side plate 120.

[0050] As shown in Figures 1-9 In another embodiment of the utility model, mounting holes 540 are arranged on the vertical plate 510, the top plate 520 and the connecting plate 530, wherein the mounting holes 540 are screw holes 715, and the vertical plate 510, the top plate 520 and the connecting plate 530 are fixed and mounted in the preset position by screws.

[0051] As Figures 1-9 shown in another embodiment of the utility model, the connecting plate 530 is provided with a let -pass slot 550 for avoiding the height adjusting rod of support 100, so as to facilitate the smooth passing of the adjusting rod and prevent structural interference.

[0052] As Figures 1-9 shown in another embodiment of the utility model, the rotating seat 400 includes a fixed block 410 and a connecting block 420, the end of the connecting block 420 is rotationally connected with the fixed block 410, the fixed block 410 is provided in a shape of a Chinese character 'fang', the end of the connecting block 420 is rotationally connected in the inner groove of the fixed block 410, the top end of the fixed block 410 is fixedly connected with the table plate, wherein the body of the fixed block 410 is provided in a shape of a shaft body, the top end of the fixed block 410 is provided in a shape of a flat plate, and the top end of the fixed block 410 is parallelly and adjacently arranged with the end face of the table plate. The parallel and adjacent arrangement of the fixed block 410 and the table plate is conducive to improving the connecting area between the fixed block 410 and the table plate, thereby improving the connecting stability between the fixed block 410 and the table plate and preventing the table plate from loosening.

[0053] As Figures 1-9 shown in another embodiment of the utility model, the support 100 further includes a fixed table plate 600, the fixed table plate 600 is provided in a shape of L, the area of the fixed table plate 600 is greater than that of the rotating table plate 200, the fixed table plate 600 is fixedly connected with the edge of the mounting frame 130 away from the rotating table plate 200, the rotating table plate 200 can be rotated to be flush with the fixed table plate 600, when the fixed table plate 600 and the rotating table plate 200 are parallel, the sum of the areas of the fixed table plate 600 and the rotating table plate 200 is equal to the area of the inner ring of the mounting frame 130. The fixed table plate 600 is conducive to improving the carrying capacity of the study table, thereby improving the practicability of the study table.

[0054] As Figures 1-9As shown in another embodiment of the utility model, the fixed table board 600 is provided with a storage rack 700, the storage rack 700 includes installation backboard 710, mounting rack 720 and storage box 730, the mounting rack 720 is arranged at the top of fixed table board 600, the storage box 730 is arranged on the mounting rack 720, the installation backboard 710 is arranged on the side wall of mounting rack 720, wherein, the installation backboard 710 includes first base plate 711 and second base plate 712, first base plate 711 and second base plate 712 are sequentially connected on the side wall of mounting rack 720, first base plate 711 and second base plate 712 are respectively provided with first tooth part 713 and second tooth part 714 on the edge, first tooth part 713 and second tooth part 714 are engaged and adapted, first tooth part 713 and second tooth part 714 are respectively provided with screw hole 715, and first tooth part 713 and second tooth part 714 are fixedly installed on the side wall of mounting rack 720 through screws.

[0055] Specifically, when installing the storage rack 700, the edges of the first base plate 711 and the second base plate 712 are engaged through the first tooth part 713 and the second tooth part 714, wherein the first tooth part 713 and the second tooth part 714 are vertically arranged along the side wall of the mounting rack 720, and the mounting rack 720 is provided with a connecting hole corresponding to all the screw holes 715 on the tooth parts. The user fixes the first tooth part 713 and the second tooth part 714 on the side wall of the mounting rack 720 in sequence through the screw, the connecting hole, and the screw hole 715, thereby fixing the first base plate 711 and the second base plate 712 and completing the assembly of the installation backboard 710. Compared with the backboard in the prior art, which is provided in an integral structure, the area is too large and is prone to deformation, affecting the use. The installation base plate provided in the embodiment of the utility model is designed in a split type, which improves the installation convenience. Through the engagement of the tooth parts, the first base plate 711 and the second base plate 712 can be stably aligned, maintain the integrity, and effectively improve the installation accuracy of the installation base plate.

[0056] As shown in another embodiment of the utility model, Figures 1-9 As shown in another embodiment of the utility model, the overall length of the first base plate 711 and the second base plate 712 is the same as the length of the fixed table board 600, and the first base plate 711 and the second base plate 712 can be matched in different proportions according to the user's needs.

[0057] As shown in another embodiment of the utility model, Figures 1-9As shown in the utility model, in another embodiment of the utility model, the first tooth part 713 and the second tooth part 714 are same in structure, a straight edge 716 is arranged between the first tooth part 713 and the second tooth part 714, the first tooth part 713 and the second tooth part 714 are slightly separated by the straight edge 716, which is conducive to reducing the size precision requirement of the first tooth part 713 and the second tooth part 714 and reducing the production difficulty.

[0058] As Figures 1-9 As shown in the utility model, in another embodiment of the utility model, all the screw holes 715 are located on the same straight line, and all the screw holes 715 are distributed along the vertical direction, so as to facilitate screw installation and processing.

[0059] As Figures 1-9 As shown in the utility model, in another embodiment of the utility model, the inner ring of the mounting frame 130 is provided with a supporting rib 800 for supporting the fixed table plate 600, the supporting rib 800 is fixedly connected with the mounting frame 130 close to the edge of the rotating table plate 200, and the supporting rib 800 structure is conducive to preventing the collapse of the fixed table plate 600 and the rotating table plate 200 due to the lack of support in the middle.

[0060] As Figures 1-9 As shown in the utility model, in another embodiment of the utility model, the bottom edge of the rotating table plate 200 is provided with a handle 250, the top end of the side plate 120 close to the rotating table plate 200 is provided with a gap for accommodating the handle 250, and the end of the handle 250 can extend to one side of the side plate 120 through the gap. In other embodiments, a controller for controlling the telescopic member 320 is arranged in the handle 250, and the telescopic member 320 is a pneumatic cylinder, a hydraulic rod or an electric rod.

[0061] As Figures 1-9 As shown in the utility model, in another embodiment of the utility model, the bracket 100 further comprises a drawer assembly 900, the drawer assembly 900 is arranged between the two groups of side plates 120, and the length of the drawer assembly 900 is equal to the overall length of the rotating table plate 200 and the fixed table plate 600. The drawer assembly 900 is conducive to improving the accommodation effect of the study table.

[0062] As Figures 1-9 Figures 1-9As shown in another embodiment of the present application, the drawer assembly 900 comprises slide rails 910 and slide pockets 920, the number of the slide rails 910 is two groups, two groups of the slide rails 910 are respectively installed on the corresponding side plates 120, two groups of the slide rails 910 are provided with slide grooves at opposite ends, and two groups of edges of the slide pockets 920 are respectively and one by one slidably connected in the corresponding slide grooves, and the telescopic slide pockets 920 are beneficial to further improve the practicability of the drawer assembly 900.

[0063] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A three-sided connecting unit, suitable for a support of a learning desk, the support comprising side panels, a mounting frame and a back panel, the back panel being disposed between two groups of the side panels and below the mounting frame; characterized in that: The three-face connecting unit comprises a top plate, a vertical plate and a connecting plate, the connecting plate is fixedly connected with the side plate, the vertical plate is fixedly connected with the mounting frame, the vertical plate is fixedly connected with the rear plate, the vertical plate, the top plate and the connecting plate are integrally formed by casting, and the vertical plate, the top plate and the connecting plate are vertically arranged in pairs.

2. The three-sided connection unit of claim 1, wherein: The area of the connecting plate is much larger than that of the vertical plate, and the area of the connecting plate is larger than that of the top plate.

3. The three-sided connection unit of claim 1, wherein: The vertical plate, the top plate and the connecting plate are provided with mounting holes.

4. The three-sided connection unit of claim 3, wherein: The connecting plate is provided with a clearance slot for height adjustment of the support bracket.

5. A learning desk, characterized by: The three-face connecting unit comprises a top plate, a vertical plate and a connecting plate, the connecting plate is fixedly connected with the side plate, the vertical plate is fixedly connected with the mounting frame, the vertical plate is fixedly connected with the rear plate, the vertical plate, the top plate and the connecting plate are integrally formed by casting, and the vertical plate, the top plate and the connecting plate are vertically arranged in pairs.

6. The learning desk according to claim 5, characterized in that, The area of the connecting plate is much larger than that of the vertical plate, and the area of the connecting plate is larger than that of the top plate.

7. The learning desk according to claim 6, characterized in that: The vertical plate, the top plate and the connecting plate are provided with mounting holes.

8. The learning desk according to claim 7, characterized in that: The connecting plate is provided with a clearance slot for height adjustment of the support bracket.

9. The learning desk according to claim 8, characterized in that: The three-face connecting unit comprises a top plate, a vertical plate and a connecting plate, the connecting plate is fixedly connected with the side plate, the vertical plate is fixedly connected with the mounting frame, the vertical plate is fixedly connected with the rear plate, the vertical plate, the top plate and the connecting plate are integrally formed by casting, and the vertical plate, the top plate and the connecting plate are vertically arranged in pairs.

10. The learning desk according to claim 8, characterized in that: The area of the connecting plate is much larger than that of the vertical plate, and the area of the connecting plate is larger than that of the top plate. The vertical plate, the top plate and the connecting plate are provided with mounting holes. The connecting plate is provided with a clearance slot for height adjustment of the support bracket. The three-face connecting unit comprises a top plate, a vertical plate and a connecting plate, the connecting plate is fixedly connected with the side plate, the vertical plate is fixedly connected with the mounting frame, the vertical plate is fixedly connected with the rear plate, the vertical plate, the top plate and the connecting plate are integrally formed by casting, and the vertical plate, the top plate and the connecting plate are vertically arranged in pairs. The area of the connecting plate is much larger than that of the vertical plate, and the area of the connecting plate is larger than that of the top plate. The vertical plate, the top plate and the connecting plate are provided with mounting holes. The connecting plate is provided with a clearance slot for height adjustment of the support bracket. The three-face connecting unit comprises a top plate, a vertical plate and a connecting plate, the connecting plate is fixedly connected with the side plate, the vertical plate is fixedly connected with the mounting frame, the vertical plate is fixedly connected with the rear plate, the vertical plate, the top plate and the connecting plate are integrally formed by casting, and the vertical plate, the top plate and the connecting plate are vertically arranged in pairs. The area of the connecting plate is much larger than that of the vertical plate, and the area of the connecting plate is larger than that of the top plate. The vertical plate, the top plate and the connecting plate are provided with mounting holes. The connecting plate is provided with a clearance slot for height adjustment of the support bracket. The three-face connecting unit comprises a top plate, a vertical plate and a connecting plate, the connecting plate is fixedly connected with the side plate, the vertical plate is fixedly connected with the mounting frame, the vertical plate is fixedly connected with the rear plate, the vertical plate, the top plate and the connecting plate are integrally formed by casting, and the vertical plate, the top plate and the connecting plate are vertically arranged in pairs. The area of the connecting plate is much larger than that of the vertical plate, and the area of the connecting plate is larger than that of the top plate. The vertical plate, the top plate and the connecting plate are provided with mounting holes. The connecting plate is provided with a clearance slot for height adjustment of the support bracket. The three-face connecting unit comprises a top plate, a vertical plate and a connecting plate, the connecting plate is fixedly connected with the side plate, the vertical plate is fixedly connected with the mounting frame, the vertical plate is fixedly connected with the rear plate, the vertical plate, the top plate and the connecting plate are integrally formed by casting, and the vertical plate, the top plate and the connecting plate are vertically arranged in pairs. The area of the connecting plate is much larger than that of the vertical plate, and the area of the connecting plate is larger than that of the top plate. The vertical plate, the top plate and the connecting plate are provided with mounting holes. The connecting plate is provided with a clearance slot for height adjustment of the support bracket. The three-face connecting unit comprises a top plate, a vertical plate and a connecting plate, the connecting plate is fixedly connected with the side plate, the vertical plate is fixedly connected with the mounting frame, the vertical plate is fixedly connected with the rear plate, the vertical plate, the top plate and the connecting plate are integrally formed by casting, and the vertical plate, the top plate and the connecting plate are vertically arranged in pairs. The area of the connecting plate is much larger than that of the vertical plate, and the area of the connecting plate is larger than that of the top plate. The vertical plate, the top plate and the connecting plate are provided with mounting holes. The connecting plate is provided with a clearance slot for height adjustment of the support bracket.

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