Display panel transfer equipment

Abstract

The utility model discloses a display panel transferring device which comprises a transferring box body, a mechanical arm, an air knife and a driving assembly. The transferring box body comprises a shell, an inlet and outlet is formed in one side of the shell, a first guide rail is horizontally arranged in the shell, and a sliding block is slidably arranged on the first guide rail. The mechanical arm is arranged on the sliding block, the top of the mechanical arm is provided with a bearing face, and the bearing face is higher than the friction face of the sliding block and the first guide rail. The air knife is arranged in the shell and close to the inlet-outlet. The driving assembly is connected with the shell and used for driving the shell to move between the two stations. Through the protection effect of the shell, the bearing surface is higher than the friction surface of the sliding block and the first guide rail, and the blowing effect of the air knife, the poor quality caused by the fact that foreign matter generated by friction of moving parts falls onto the display panel can be avoided, and the machining quality of the display panel is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to display device manufacturing technical field especially relates to a kind of display panel transfer equipment. BACKGROUND

[0002] In the manufacturing process of display panel, display panel needs to use transfer equipment to transport between each process.Referring to Figure 1 It is shown that one kind of transfer equipment, including guide rail 1', base 2', stand 3', lifting slider 4', multi-degree-of-freedom manipulator 5' and mechanical arm 6'.Wherein, guide rail 1' is used to connect the corresponding station between adjacent two processes, and the two ends of the length direction of guide rail 1' respectively extend to the two stations needing to transport display panel.Base 2' is slidably arranged on guide rail 1' and can move along the length direction of guide rail 1'.Stand 3' is vertically arranged on base 2', and lifting slider 4' is slidably arranged on stand 3' and can make lifting motion on stand 3'.Lifting slider 4' is provided with multi-degree-of-freedom manipulator 5', and mechanical arm 6' is installed on mechanical hand 5', and mechanical arm 6' is used to carry display panel, and mechanical arm 6' is provided with a plurality of suction cups 61' for adsorbing display panel.In taking and placing display panel and conveying display panel, multi-degree-of-freedom manipulator 5' can drive display panel to move in horizontal direction, to adjust the horizontal direction of display panel.Lifting slider 4' is used to drive display panel to lift to adjust the position height of display panel.Base 2' is used to drive display panel to move along the length direction of guide rail 1', to realize the transport of display panel between two stations.

[0003] The existing transfer equipment has the following deficiencies: since lifting slider 4' and multi-degree-of-freedom manipulator 5' are all moving parts, foreign matter is easy to be generated due to friction during movement.In the driving process of mechanical arm 6', mechanical arm 6' can move below the movement joint of multi-degree-of-freedom manipulator 5' and move to the area close to lifting slider 4', so that the foreign matter generated by moving parts can fall on display panel, and then cause display panel to be defective, affecting the manufacturing quality of display panel. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of display panel transfer equipment, which can avoid the foreign matter generated by moving parts from falling on display panel, and ensure the processing quality of display panel.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] Provided is a kind of display panel transfer equipment, comprising:

[0007] The transfer box comprises a shell, an inlet and an outlet are arranged on one side of the shell in the horizontal direction for the display panel to pass through, a first guide rail is arranged horizontally in the shell, and a sliding block is arranged on the first guide rail;

[0008] A mechanical arm is arranged on the sliding block, the top of the mechanical arm is provided with a bearing surface for bearing the display panel, and the bearing surface is higher than the friction surface of the sliding block and the first guide rail;

[0009] An air knife is arranged in the shell and close to the inlet and outlet, and the blowing direction of the air knife is downward and inclined to the outside of the shell;

[0010] A driving assembly is connected with the shell, and the driving assembly is used to drive the shell to move.

[0011] As an optional solution of the display panel transfer device, the first guide rail is two, the two first guide rails are arranged in parallel in the horizontal direction, the mechanical arm comprises a main support and a plurality of branch supports arranged on the same side of the main support, the opposite ends of the main support are connected with the sliding blocks corresponding to the two first guide rails respectively, and the top surface of the branch support forms the bearing surface.

[0012] As an optional solution of the display panel transfer device, the branch support is provided with an elastic limiting piece close to one end of the main support, and the limiting piece is used to abut against the end of the display panel.

[0013] As an optional solution of the display panel transfer device, a plurality of suction cups for adsorbing the display panel are arranged on the bearing surface in the length direction of the branch support.

[0014] As an optional solution of the display panel transfer device, viscous paper is arranged between the two first guide rails, the viscous paper is located below the mechanical arm, and the viscous paper is used to adhere foreign matters in the shell.

[0015] As an optional solution of the display panel transfer device, the shell is provided with an upper chamber and a lower chamber which are arranged in the vertical direction, and the first guide rail, the sliding block and the mechanical arm are arranged in the upper chamber and the lower chamber.

[0016] As an optional solution of the display panel transfer device, the shell comprises a frame and a side plate, the frame has a plurality of side surfaces in the horizontal direction, each side surface is provided with an opening for communicating the inside and outside of the shell, the opening of one of the side surfaces forms the inlet and outlet, and the side plates are detachably arranged on the remaining side surfaces, and the side plates are used to block the corresponding openings.

[0017] As an optional solution of the display panel transfer equipment, one side of the upper chamber and the lower chamber is provided with the inlet and outlet, and a box door is rotationally arranged on the shell and used for covering any one of the inlet and outlet.

[0018] As an optional solution of the display panel transfer equipment, the driving assembly comprises a first driving assembly and a second driving assembly, the first driving assembly comprises a scissor support frame arranged at the bottom of the shell and used for driving the shell to move up and down, and the second driving assembly comprises a second guide rail and a base slidingly arranged on the second guide rail, and the scissor support frame is mounted on the base.

[0019] As an optional solution of the display panel transfer equipment, the base comprises a sliding part and a rotating table, the sliding part is slidingly connected with the second guide rail, the rotating table is rotationally arranged on the sliding part, the scissor support frame is mounted on the rotating table, and the rotating table is used for driving the shell to rotate.

[0020] The display panel transfer equipment has the following beneficial effects compared with the prior art:

[0021] The display panel transfer equipment has the following beneficial effects compared with the prior art: BRIEF DESCRIPTION OF DRAWINGS

[0022] The display panel transfer equipment has the following beneficial effects compared with the prior art:

[0023] Figure 1 FIG. 1 is a schematic view of a display panel transfer equipment in the prior art.

[0024] Figure 2 FIG. 4 is a sectional view of a display panel transfer equipment according to an embodiment of the present application.

[0025] Figure 3 FIG. 6 is a sectional view of a transfer box according to an embodiment of the present application.

[0026] Figure 4 FIG. 8 is a schematic view of a mechanical arm according to an embodiment of the present application.

[0027] Figure 5 The exploded view of the shell of the embodiment of the utility model.

[0028] Figure 1 In the middle:

[0029] 1', guide rail; 2', base; 3', stand; 4', lifting slider; 5', multi-degree-of-freedom manipulator; 6', mechanical arm; 61', suction cup.

[0030] Figures 2 to 5 In the middle:

[0031] 1, first driving assembly; 11, scissor support frame; 2, second driving assembly; 21, second guide rail; 22, base; 221, sliding part; 222, rotary table; 3, transfer box body; 31, shell; 311, bottom plate; 312, top plate; 313, partition plate; 314, stand; 315, side plate; 32, upper chamber; 33, lower chamber; 34, first guide rail; 35, sliding block; 36, inlet and outlet; 37, box door; 4, mechanical arm; 41, main support; 42, branch support; 43, suction cup; 44, limiting piece; 45, bearing surface; 5, air knife; 6, adhesive paper; 7, display panel. DETAILED DESCRIPTION

[0032] The advantages and features of the utility model and the method for realizing them will become apparent from the following embodiments described in detail in conjunction with the drawings. However, the utility model is not limited to the embodiments disclosed below, but can be realized in various different forms, and the embodiments are provided only to accomplish the disclosure of the utility model and make those skilled in the art fully understand the scope of the utility model, and the utility model is limited only by the scope of the claims. The same reference signs represent the same constituent elements throughout the specification.

[0033] Hereinafter, the utility model will be described in detail with reference to the drawings.

[0034] As Figure 2 and Figure 3As shown, the embodiment provides a display panel transfer equipment (hereinafter referred to as transfer equipment) for transferring display panel 7 between two stations. The transfer equipment includes a transfer box 3, a mechanical arm 4, an air knife 5 and a driving assembly. The transfer box 3 is used to accommodate the display panel 7, so that the display panel 7 can be located inside the transfer box 3 during the transfer process. The transfer box 3 is a cuboid structure, and the length direction of the transfer box 3 is the Y direction shown in the figure, the width direction is the X direction shown in the figure, and the height direction is the Z direction shown in the figure. The transfer box 3 includes a shell 31, a first guide rail 34 and a sliding block 35. The shape of the shell 31 matches the shape of the transfer box 3. The inside of the shell 31 has an accommodation cavity for accommodating the mechanical arm 4, the air knife 5 and the display panel 7. The shell 31 is provided with an entrance and exit 36 for the display panel 7 to pass through along one side in the horizontal direction. In the embodiment, the entrance and exit 36 is arranged on one side of the length direction (Y direction shown in the figure) of the shell 31. The first guide rail 34 is horizontally arranged, the length of the first guide rail 34 extends along the length direction of the shell 31, and one end of the length direction of the first guide rail 34 extends to a position close to the entrance and exit 36. The sliding block 35 is slidingly arranged on the first guide rail 34, and the sliding block 35 can slide along the length direction of the first guide rail 34. The mechanical arm 4 is arranged on the sliding block 35, and the mechanical arm 4 is driven to move by the sliding of the sliding block 35 on the first guide rail 34. The mechanical arm 4 is used to carry the display panel 7. The top of the mechanical arm 4 has a carrying surface 45 for carrying the display panel 7, and the carrying surface 45 is higher than the friction surface between the sliding block 35 and the first guide rail 34. The air knife 5 is a prior art, and the specific structure and working principle of the air knife 5 will not be described again. The air knife 5 is used to blow gas towards the display panel 7 to clean the surface of the display panel 7. The air knife 5 is arranged in the accommodation cavity of the shell 31, and the air knife 5 is close to the entrance and exit 36. The air knife 5 is located above the mechanical arm 4, and the air knife 5 can blow gas downward towards the display panel 7. At the same time, the blowing direction of the air knife 5 also tilts towards the outside of the shell 31, so that the gas blown by the air knife 5 has kinetic energy moving downward and outward. The driving assembly is connected with the shell 31, and the driving assembly is used to drive the shell 31 to move between two stations to realize the transfer of the display panel 7 between the two stations.

[0035] It can be understood that by arranging the transfer box 3, the display panel 7 can be accommodated inside the shell 31 during the transfer process, so as to play a protective role for the display panel 7, and avoid foreign matter falling on the display panel 7 due to the friction of external moving parts to cause quality defects. In addition, the first guide rail 34 and the sliding block 35 constitute a moving part for driving the mechanical arm 4 to pick and place the display panel 7, and the carrying surface 45 is higher than the friction surface between the sliding block 35 and the first guide rail 34, which is conducive to reducing the risk of foreign matter falling on the display panel 7 due to the friction between the sliding block 35 and the first guide rail 34.

[0036] In particular, with reference to Figure 3 andFigure 4 As shown, the first guide rail 34 is two, two first guide rail 34 along the width direction of the shell 31 (illustrated X direction) parallel and interval arrangement, and the first guide rail 34 extends along the horizontal direction. Correspondingly, each first guide rail 34 is provided with a sliding block 35. The first guide rail 34 is also provided with a screw rod, the screw rod is provided in the sliding block 35 and is threadedly connected with the sliding block 35, and the screw rod is connected with a motor, and the screw rod is driven to rotate by the motor. In this embodiment, the screw rod, the sliding block 35 and the motor constitute the driving device commonly used in the mechanical field, and belong to the mature prior art, which will not be described in detail here. The driving device composed of the screw rod, the sliding block 35 and the motor is used to drive the mechanical arm 4 to move along the length direction of the first guide rail 34, so as to realize the taking and placing of the display panel 7.

[0037] The mechanical arm 4 includes a main support 41 and a plurality of branch supports 42. The main support 41 is long strip-shaped, and the two ends of the main support 41 in the length direction are respectively connected with the sliding blocks 35 on the two first guide rails 34, so that the main support 41 moves synchronously with the sliding blocks 35. The three branch supports 42 are parallel and arranged on one side of the main support 41 facing the inlet and outlet 36. The three branch supports 42 are located on the same horizontal plane, and the three branch supports 42 are used to carry the display panel 7. Correspondingly, the top surface of the branch support 42 forms a carrying surface 45 for carrying the display panel 7. Along the length direction of the branch support 42 (illustrated Y direction), a plurality of suction cups 43 are arranged on the carrying surface 45 of the branch support 42. The suction cup 43 is a prior art, which uses the principle of vacuum adsorption to adsorb and fix the display panel 7, so as to avoid the display panel 7 from sliding off the mechanical arm 4 during the transfer process. The end of the branch support 42 close to the main support 41 is provided with a limiting piece 44, and the limiting piece 44 is made of elastic material, such as rubber, silica gel and the like, so that the limiting piece 44 has elasticity. The limiting piece 44 plays a blocking and limiting role on the display panel 7. When the mechanical arm 4 picks up the display panel 7, the sliding block 35 drives the mechanical arm 4 to move outward of the shell 31. The branch support 42 enters the bottom of the display panel 7 to place the display panel 7 on the branch support 42, and in this process, the limiting piece 44 can abut against the end of the display panel 7 to avoid the display panel 7 from moving towards the main support 41.

[0038] The two first guide rails 34 are also provided with a sticky paper 6. The sticky paper 6 is a prior art, that is, a sticky substance is coated on one side of the adhesive paper, so that it has certain adhesion. The sticky paper 6 is arranged below the mechanical arm 4. During the operation of the mechanical arm 4, the foreign matter generated by the friction between the sliding block 35 and the first guide rail 34 can be stuck on the sticky paper 6, so as to reduce the risk of the foreign matter moving to the display panel 7 along the air flow.

[0039] In particular, continuing to refer to Figure 2As shown, the shell 31 is a hollow structure, and a containing cavity is formed in the shell 31. A partition plate 313 is horizontally arranged in the containing cavity, and the containing cavity is divided into an upper chamber 32 and a lower chamber 33 which are spaced apart in the vertical direction. The upper chamber 32 and the lower chamber 33 have the same internal structure, and both are installed with a first guide rail 34, a sliding block 35, a mechanical arm 4 and an air knife 5. The upper chamber 32 and the lower chamber 33 can independently transfer the display panel 7. Correspondingly, one side of the upper chamber 32 and the lower chamber 33 is provided with an inlet and outlet 36. The shell 31 is rotatably provided with a cabinet door 37, and the cabinet door 37 is rotatably installed between the two inlets and outlets 36. The cabinet door 37 is used to cover any one of the inlets and outlets 36. It can also be understood that the two inlets and outlets 36 are provided with only one cabinet door 37, when the cabinet door 37 is rotated to the upper side, the cabinet door 37 closes the inlet and outlet 36 of the upper chamber 32; when the cabinet door 37 is rotated to the lower side, the cabinet door 37 closes the inlet and outlet 36 of the lower chamber 33.

[0040] It can be understood that by arranging one cabinet door 37 between the two inlets and outlets 36. In actual application, when one of the inlets and outlets 36 is opened to take or place the display panel 7, the other inlet and outlet 36 is closed to avoid foreign matter in the airflow blown by the air knife 5 from entering the other inlet and outlet 36 during the process of taking or placing the display panel 7. In addition, by arranging the upper chamber 32 and the lower chamber 33 in the shell 31, the transfer efficiency of the display panel 7 is improved. For example, when the shell 31 is at the first station, the mechanical arm 4 in the upper chamber 32 is used to extract the unprocessed display panel 7 at the first station, and the mechanical arm 4 in the lower chamber 33 is used to send the processed display panel 7 back to the first station. Then when the shell 31 moves to the second station, the mechanical arm 4 in the upper chamber 32 is used to place the taken display panel 7 to the second station for processing, and the mechanical arm 4 in the lower chamber 33 is used to extract the processed display panel 7 at the second station.

[0041] Specifically, referring to Figure 5As shown, the shell 31 comprises a frame and a side plate 315. The frame is a cuboid structure, which shape matches the shape of the shell 31. The frame has a plurality of sides in the horizontal direction, each of which is provided with an opening for communicating the inside and outside of the shell 31. In this embodiment, the frame comprises a bottom plate 311 and a top plate 312 which are parallel and spaced apart in the vertical direction, and a column 314 which is arranged between the bottom plate 311 and the top plate 312. Specifically, the column 314 is four, and the four columns 314 are distributed at the four corner positions of the shell 31, and the two ends of the column 314 are connected with the bottom plate 311 and the top plate 312 respectively. This structure can make both ends of the length direction and both ends of the width direction of the frame form openings. Correspondingly, the four corners of the partition plate 313 are connected with the middle positions of the four columns 314 respectively. One of the four openings of the frame forms the access port 36. Correspondingly, under the partitioning action of the partition plate 313, the opening on one side of the frame is actually partitioned into two access ports 36. The remaining three sides are detachably provided with side plates 315, which are used to block the openings on the corresponding sides. In this embodiment, the bottom plate 311, the top plate 312 and the three side plates 315 together enclose a containing cavity. The side plates 315 are installed on the three sides of the frame by screws. After a period of use, the side plates 315 can be removed for cleaning the inside of the shell 31 to avoid foreign matter left by the friction of moving parts.

[0042] Specifically, continuing to refer to Figure 2 As shown, the drive assembly comprises a first drive assembly 1 and a second drive assembly 2. The first drive assembly 1 is used to drive the whole transfer box 3 to move up and down. The first drive assembly 1 comprises a scissor support frame 11 and a driving part. The scissor support frame 11 is a prior art, which plays a supporting role for the transfer box 3. One end of the scissor support frame 11 is connected with the bottom of the shell 31. The driving part can adopt a screw-sliding block mechanism, a hydraulic cylinder or an air cylinder, etc. to drive the transfer box 3 to move up and down. It should be noted that the lifting drive device composed of the scissor support frame 11 and the driving part is a mature prior art in the mechanical field, and the specific structure and working principle will not be described herein.

[0043] The second drive assembly 2 is used to drive the whole transfer box 3 to move between two stations. The second drive assembly 2 comprises a second guide rail 21 and a base 22. The two ends of the length direction of the second guide rail 21 extend to the two stations respectively. The second guide rail 21 is two, and the two second guide rails 21 are parallel and spaced apart. The base 22 is slidingly arranged on the second guide rail 21 and can slide along the length direction of the second guide rail 21. Correspondingly, a screw-sliding block mechanism or a gear-rack mechanism is further arranged between the second guide rail 21 and the base 22, so as to drive the base 22 to slide along the second guide rail 21 by the existing driving device such as the screw-sliding block mechanism or the gear-rack mechanism. One end of the scissor support frame 11 away from the shell 31 is mounted on the base 22.

[0044] In some embodiments, the base 22 comprises a sliding part 221 and a rotary table 222. The sliding part 221 is in sliding connection with the second guide rail 21, and the sliding part 221 can slide along the length direction of the second guide rail 21. The rotary table 222 is rotationally arranged on the sliding part 221, and the rotary table 222 can rotate around its own axis direction. The scissor-type support frame 11 is mounted on the rotary table 222 at the end away from the shell 31, so that the rotary table 222 can drive the shell 31 to rotate. It can be understood that the orientations of the two stations for taking and placing the display panel 7 can be different. When the orientations of the two stations for taking and placing the display panel 7 are different, the rotary table 222 can be rotated to make the inlet and outlet 36 on the shell 31 face the taking and placing position of the display panel 7.

[0045] The method for using the transfer device is as follows: the base 22 moves along the second guide rail 21 to the first station, the rotary table 222 and the first driving assembly 1 are rotated and lifted, so that the inlet and outlet 36 are aligned with the taking and placing position of the first station. One of the mechanical arms 4 takes away the unprocessed display panel 7 on the first station, i.e., the display panel 7 is taken to the inside of the shell 31 by the mechanical arm 4. And the other mechanical arm 4 places the processed display panel 7 back to the first station. Then, the base 22 moves along the second guide rail 21 to the second station, the rotary table 222 and the first driving assembly 1 are rotated and lifted, so that the inlet and outlet 36 are aligned with the taking and placing position of the second station. One of the mechanical arms 4 places the processed display panel 7 on the second station. And the other mechanical arm 4 takes away the processed display panel 7 on the second station and takes the processed display panel 7 back to the inside of the shell 31. The operation is repeated in this way to realize the transfer of the display panel 7 between the two stations.

[0046] The beneficial effects of the present embodiment are as follows: the transfer box 3 is arranged to accommodate the display panel 7 in the shell 31 during the transfer process, so as to protect the display panel 7 and avoid the foreign matters generated by the friction of the external moving parts from falling on the display panel 7 and causing quality defects. The first guide rail 34 and the sliding block 35 constitute the moving parts for driving the mechanical arm 4 to take and place the display panel 7, and the bearing surface 45 is higher than the friction surface between the sliding block 35 and the first guide rail 34, which is beneficial to reduce the risk of foreign matters falling on the display panel 7 generated by the friction between the sliding block 35 and the first guide rail 34. At the same time, the air knives 5 blow air outward, which can reduce the risk of external floating foreign matters entering the shell 31, thereby ensuring the processing quality of the display panel 7.

[0047] Although the embodiments of the present application have been described above with reference to the drawings, the present application is not limited to the above embodiments, but can be manufactured in various forms, and it will be understood by those skilled in the art that the present application can be implemented in other specific forms without changing the technical spirit or essential characteristics of the present application. Therefore, it should be understood that the above-described embodiments are exemplary in all aspects and are not limiting.

Claims

1. A display panel transfer apparatus characterized by comprising: The utility model relates to a display panel transfer device, including: A transfer box is provided with an entrance and exit for the display panel to pass through on one side in the horizontal direction, a first guide rail is arranged horizontally in the box, and a sliding block is arranged on the first guide rail; A mechanical arm is arranged on the sliding block, the top of the mechanical arm is provided with a bearing surface for bearing the display panel, and the bearing surface is higher than the friction surface of the sliding block and the first guide rail; A gas knife is arranged in the box and close to the entrance and exit, and the blowing direction of the gas knife is downward and inclined outward of the box; A driving assembly is connected with the box, and the driving assembly is used for driving the box to move.

2. The display panel transfer apparatus according to claim 1, wherein The first guide rail is two, and the two first guide rails are arranged in parallel along the horizontal direction, the mechanical arm includes a main support and a plurality of branch supports arranged on the same side of the main support, the opposite ends of the main support are connected with the sliding blocks corresponding to the two first guide rails respectively, and the top surface of the branch support forms the bearing surface.

3. The display panel transfer apparatus according to claim 2, wherein The end of the branch support close to the main support is provided with an elastic limiting piece, and the limiting piece is used for abutting with the end of the display panel.

4. The display panel transfer apparatus according to claim 2, wherein A plurality of suction cups for adsorbing the display panel are arranged on the bearing surface along the length direction of the branch support.

5. The display panel transfer apparatus according to claim 2, wherein Viscous paper is arranged between the two first guide rails, the viscous paper is located below the mechanical arm, and the viscous paper is used for adhering foreign matters in the box.

6. The display panel transfer apparatus according to any one of claims 1 to 5, characterized by The box has an upper chamber and a lower chamber arranged in the vertical direction, and the first guide rail, the sliding block and the mechanical arm are arranged in the upper chamber and the lower chamber.

7. The display panel transfer apparatus according to claim 6, wherein The box includes a frame and a side plate, the frame has a plurality of side surfaces in the horizontal direction, each side surface is provided with an opening for communicating the inside and outside of the box, the opening of one of the side surfaces forms the entrance and exit, and the remaining side surfaces are detachably provided with the side plate.

8. The display panel transfer apparatus according to claim 6, wherein One side of the upper chamber and the lower chamber is provided with the entrance and exit, a box door is rotatably arranged on the box, and the box door is used for covering any one of the entrance and exit.

9. The display panel transfer apparatus according to any one of claims 1 to 5, characterized by The driving assembly includes a first driving assembly and a second driving assembly, the first driving assembly includes a scissor support frame arranged at the bottom of the box, the scissor support frame is used for driving the box to move up and down, and the second driving assembly includes a second guide rail and a base slidingly arranged on the second guide rail.

10. The display panel transfer apparatus according to claim 9, wherein The base includes a sliding part and a rotating table, the sliding part is slidingly connected with the second guide rail, the rotating table is rotatably arranged on the sliding part, the scissor support frame is arranged on the rotating table, and the rotating table is used for driving the box to rotate.

Images