Automatic edge cutting equipment for end part of liner of refrigerator cabinet door

Abstract

The refrigerator cabinet door lining end automatic edge cutting equipment comprises a machine frame and a frame body, the machine frame can move on the frame body through a movable guide rail assembly, a vertical frame slides on the top of the machine frame in the length direction, and one side of the top of the machine frame protrudes upwards to form a support consistent with the vertical frame in height. The vertical frame and the support are each provided with a tool rest mechanism used for cutting door liner end face waste. The knife rest mechanism comprises a frame, a pressing plate air cylinder, a cutter, pressing plates and a cutter motor, the pressing plate air cylinder is perpendicularly fixed to the top of the frame, the frame and the output end of the pressing plate air cylinder are each provided with one pressing plate, and the upper pressing plate and the lower pressing plate can extrude each other through the pressing plate air cylinder. The cutter motor is used for driving the chain assembly to move. According to the equipment, the number of edge cutting operators can be reduced, the production efficiency is improved, the high-takt production requirement of cutting one or two pieces at the same time is met, die assistance is not needed, the cost is low, the edge cutting quality is stable, and the universality is high.

Description

Technical Field

[0001] The invention relates to the technical field of refrigerator cabinet production and processing, and in particular to an automatic edge-marking device for the end of a refrigerator cabinet door lining. Background Art

[0002] In the refrigerator cabinet industry, the waste materials around the refrigerator cabinet door need to be removed after the refrigerator cabinet door is formed by vacuum forming machine. The product quality and appearance are very important. At present, the mainstream demarcation method is still based on manual demarcation with a utility knife. The automatic demarcation methods in the industry mainly include shearing machine inline demarcation, press inline pressing / punching, and mold positioning CNC blade demarcation. The manual demarcation method has problems such as low efficiency, high labor (generally requiring no less than 2 demarcation personnel), high labor intensity, low precision, and high waste.

[0003] Since the universal features of refrigerator cabinet door liner are not obvious and the plate is thin, traditional automatic edge removal equipment generally has difficulty in pre-positioning and requires the assistance of profiling molds. When producing different types of door liner, the mold needs to be replaced, which increases the subsequent cost. In addition, it is difficult to trim the middle part when using a shearing machine to trim one out of two, and there is a risk of fluff quality when cutting with a press. In addition, the above three methods are costly. Therefore, a device with high degree of automation, stable edge trimming quality, low cost, strong versatility, and can reduce labor is needed to meet production needs. Summary of the invention

[0004] The purpose of the present invention is to solve the above-mentioned problems of the background technology and to provide an automatic edge marking device for the end of the refrigerator door lining.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] An automatic trimming device for the end of a refrigerator door lining comprises a frame and a frame body, wherein the frame can move on the frame body through a movable guide rail assembly, a vertical frame is slidably arranged on the top of the frame along the length direction, one side of the top of the frame protrudes upward to form a bracket having the same height as the vertical frame, and a knife holder mechanism for cutting waste material on the end surface of the door liner is installed on the vertical frame and the bracket;

[0007] The tool holder mechanism includes a frame, a pressure plate cylinder, a cutter, a pressure plate and a cutter motor. The pressure plate cylinder is vertically fixed on the top of the frame. A group of pressure plates are respectively installed on the frame and on the output end of the pressure plate cylinder. The upper and lower groups of pressure plates can be squeezed against each other by the pressure plate cylinder. A chain assembly and a cutter motor are installed on the frame near the pressure plate. The cutter motor is used to drive the chain assembly to move, and the cutter is installed on the chain assembly.

[0008] As a further solution of the present invention: a screw rod is rotatably connected to the frame, a travel gear is fixed to the end of the screw rod, a travel motor is also fixed to the frame, the travel motor can drive the screw rod to rotate through the travel gear, and the vertical frame is threadedly connected to the screw rod.

[0009] As a further solution of the present invention: the number of the cutters is also 2 groups, and the 2 groups of cutters are both connected to the chain assembly.

[0010] As a further solution of the present invention: the upper and lower groups of pressure plates are composed of two groups of coaxial screw rods and shaft sleeves, and the opening and closing of the pressure plates can be synchronously adjusted when the screw rods are rotated.

[0011] As a further solution of the present invention: the cutter is a double-edged knife.

[0012] As a further solution of the present invention: the cutter is a single-edged knife.

[0013] As a further solution of the present invention: a guide support mechanism is installed on one side of the frame near the bracket, and a transition support mechanism is also installed on the guide support mechanism. The guide support mechanism includes a support plate 1, a guide plate and a lifting mechanism. Lifting mechanisms are respectively installed at both ends of the support plate 1, and a pair of guide plates are installed on the top of the support plate 1.

[0014] As a further solution of the present invention: a door bladder traction mechanism is slidably arranged on the frame, and the door bladder traction mechanism includes a second support plate, a clamp, a servo motor and a gear. The second support plate is detachably mounted with a clamp, the second support plate is rotatably connected with a shaft rod, a gear is fixed on the shaft rod, and a servo motor for driving the shaft rod to rotate is also mounted on the second support plate.

[0015] As a further solution of the present invention: a material supporting and unloading mechanism is also installed on the frame, and the material supporting and unloading mechanism includes a material supporting flap and a material supporting and unloading mechanism. The material supporting flap adopts a cylinder connecting rod mechanism to control the 90-degree rotation of two sets of rotating shafts.

[0016] As a further solution of the present invention: a frame moving motor is installed on the frame body, a frame moving screw rod is rotated in the extension direction of the frame, the frame moving motor is used to drive the frame moving screw rod to rotate, and the frame body can be moved on the frame under the drive of the frame moving motor.

[0017] The beneficial effects of the present invention are as follows: the equipment can reduce the number of edge marking operators, improve production efficiency, and meet the high-beat production requirements of cutting one or two sheets at the same time, and does not require mold assistance, has low cost, stable edge marking quality, and strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] Figure 1 It is a schematic diagram of the installation position when the present invention is used;

[0020] Figure 2 and 3 It is a schematic diagram of the structure of the present invention;

[0021] Figure 4 It is a structural schematic diagram of the guide support mechanism of the present invention;

[0022] Figure 5 It is a structural schematic diagram of the tool holder mechanism of the present invention;

[0023] Figure 6 It is a structural schematic diagram of the door gallbladder traction mechanism of the present invention.

[0024] In the figure: 1. Frame; 2. Frame body; 3. Material support and unloading mechanism; 4. Door liner traction mechanism; 401. Clamp; 402. Servo motor; 403. Gear; 5. Transition material support mechanism; 6. Guide support mechanism; 601. Guide plate; 602. Pressing material; 603. Lifting mechanism; 7. Knife holder mechanism; 701. Pressing plate cylinder; 702. Cutter; 703. Pressing plate; 704. Cutter motor; 8. Material support flap; 9. Turning cylinder; 10. Travel gear; 11. Travel motor; 12. Frame moving motor; 13. Frame moving screw rod; 14. Vacuum forming machine. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] For example, see Figure 1-6 As shown, the present invention is an automatic trimming device for the end of the refrigerator cabinet door lining, comprising a frame 1 and a frame body 2, wherein the frame 1 can move on the frame body 2 by moving a guide rail assembly, a vertical frame is slidably provided on the top of the frame 1 along the length direction, one side of the top of the frame 1 protrudes upward to form a bracket with the same height as the vertical frame, and a knife holder mechanism 7 for cutting the waste material of the door liner end surface is installed on the vertical frame and the bracket;

[0027] The tool holder mechanism 7 includes a frame, a pressure plate cylinder 701, a cutter 702, a pressure plate 703 and a cutter motor 704. The pressure plate cylinder 701 is vertically fixed on the top of the frame. A group of pressure plates 703 are respectively installed on the frame and on the output end of the pressure plate cylinder 701. The upper and lower groups of pressure plates 703 can be squeezed against each other by the pressure plate cylinder 701. A chain assembly and a cutter motor 704 are installed on the frame near the pressure plate 703. The cutter motor 704 is used to drive the chain assembly to move. The cutter 702 is installed on the chain assembly.

[0028] For example 2, please refer to Figure 1-6 As shown, the present invention is an automatic trimming device for the end of the refrigerator cabinet door lining, comprising a frame 1 and a frame body 2, wherein the frame 1 can be moved on the frame body 2 by moving a guide rail assembly, a screw rod is rotatably connected to the frame body 2, a travel gear 10 is fixed to the end of the screw rod, a travel motor 11 is also fixed to the frame body 2, the travel motor 11 can drive the screw rod to rotate through the travel gear 10, and the stand is threadedly connected to the screw rod.

[0029] A stand is slidably mounted on the top of the frame 1 along the length direction, and one side of the top of the frame 1 is convex upward to form a bracket with the same height as the stand. A knife holder mechanism 7 for cutting waste material from the end face of the door liner is installed on both the stand and the bracket.

[0030] The tool holder mechanism 7 includes a frame, a pressure plate cylinder 701, a cutter 702, a pressure plate 703 and a cutter motor 704. The pressure plate cylinder 701 is vertically fixed on the top of the frame. A group of pressure plates 703 are respectively installed on the frame and at the output end of the pressure plate cylinder 701. The upper and lower groups of pressure plates 703 can be squeezed against each other by the pressure plate cylinder 701. A chain assembly and a cutter motor 704 are installed on the frame near the pressure plate 703. The cutter motor 704 is used to drive the chain assembly to move. The chain assembly is installed with a cutter 702. The number of the cutters 702 is also 2 groups. The 2 groups of cutters 702 are connected to the chain assembly. The upper and lower groups of pressure plates 703 are composed of 2 groups of coaxial screw rods and sleeves. The opening and closing of the pressure plates 703 can be adjusted synchronously when the screw rods are rotated.

[0031] For example 3, please refer to Figure 1-6 As shown, the present invention is an automatic trimming device for the end of the refrigerator cabinet door lining, comprising a frame 1 and a frame body 2, wherein the frame 1 can be moved on the frame body 2 by moving a guide rail assembly, a screw rod is rotatably connected to the frame body 2, a travel gear 10 is fixed to the end of the screw rod, a travel motor 11 is also fixed to the frame body 2, the travel motor 11 can drive the screw rod to rotate through the travel gear 10, and the stand is threadedly connected to the screw rod.

[0032] A stand is slidably mounted on the top of the frame 1 along the length direction, and one side of the top of the frame 1 is convex upward to form a bracket with the same height as the stand. A knife holder mechanism 7 for cutting waste material from the end face of the door liner is installed on both the stand and the bracket.

[0033] The knife holder mechanism 7 includes a frame, a pressure plate cylinder 701, a cutter 702, a pressure plate 703 and a cutter motor 704. The pressure plate cylinder 701 is vertically fixed on the top of the frame. A set of pressure plates 703 are respectively installed on the frame and at the output end of the pressure plate cylinder 701. The upper and lower sets of pressure plates 703 can be squeezed by each other through the pressure plate cylinder 701. A chain assembly and a cutter motor 704 are installed on the frame near the pressure plate 703. The cutter motor 704 is used to drive the chain assembly to move. The chain assembly is equipped with a cutter 702. The number of the cutters 702 is also 2 groups. The 2 groups of cutters 702 are connected to the chain assembly. The upper and lower sets of pressure plates 703 are composed of 2 sets of coaxial screw rods and shaft sleeves. When the screw rods are rotated, the opening and closing of the pressure plates 703 can be adjusted synchronously. The cutter 702 is a double-edged knife.

[0034] A guide support mechanism 6 is installed on one side of the frame 1 near the bracket, and a transition support mechanism 5 is also installed on the guide support mechanism 6. The guide support mechanism 6 includes a support plate 1, a guide plate 601 and a lifting mechanism 603. Lifting mechanisms 603 are respectively installed at both ends of the support plate 1, and a pair of guide plates 601 are installed on the top of the support plate 1.

[0035] A door liner traction mechanism 4 is slidably arranged on the frame 1, and the door liner traction mechanism 4 includes a second support plate, a clamp 401, a servo motor 402 and a gear 403. The second support plate is detachably mounted with the clamp 401, the second support plate is rotatably connected with a shaft rod, the shaft rod is fixed with a gear 403, and the second support plate is also mounted with a servo motor 402 for driving the shaft rod to rotate.

[0036] The frame 1 is also provided with a material support and unloading mechanism 3, which comprises a material support flap 8 and a material support and unloading mechanism 3. The material support flap 8 adopts a cylinder connecting rod mechanism for controlling the 90-degree rotation of two sets of rotating shafts.

[0037] A frame moving motor 12 is installed on the frame body 2 , and a frame moving screw rod 13 is rotated in the extension direction on the frame 1 . The frame moving motor 12 is used to drive the frame moving screw rod 13 to rotate, and the frame body 2 can be moved on the frame 1 under the drive of the frame moving motor 12 .

[0038] Example 4, please refer to Figure 1-6As shown, the present invention is an automatic trimming device for the end of the refrigerator cabinet door lining, comprising a frame 1 and a frame body 2, wherein the frame 1 can be moved on the frame body 2 by moving a guide rail assembly, a screw rod is rotatably connected to the frame body 2, a travel gear 10 is fixed to the end of the screw rod, a travel motor 11 is also fixed to the frame body 2, the travel motor 11 can drive the screw rod to rotate through the travel gear 10, and the stand is threadedly connected to the screw rod.

[0039] A stand is slidably mounted on the top of the frame 1 along the length direction, and one side of the top of the frame 1 is convex upward to form a bracket with the same height as the stand. A knife holder mechanism 7 for cutting waste material from the end face of the door liner is installed on both the stand and the bracket.

[0040] The knife holder mechanism 7 includes a frame, a pressure plate cylinder 701, a cutter 702, a pressure plate 703 and a cutter motor 704. The pressure plate cylinder 701 is vertically fixed on the top of the frame. A set of pressure plates 703 are respectively installed on the frame and the output end of the pressure plate cylinder 701. The upper and lower sets of pressure plates 703 can be squeezed by each other through the pressure plate cylinder 701. A chain assembly and a cutter motor 704 are installed on the frame near the pressure plate 703. The cutter motor 704 is used to drive the chain assembly to move. The chain assembly is equipped with a cutter 702. The number of the cutters 702 is also 2 groups. The 2 groups of cutters 702 are connected to the chain assembly. The upper and lower sets of pressure plates 703 are composed of 2 sets of coaxial screw rods and shaft sleeves. When the screw rods are rotated, the opening and closing of the pressure plates 703 can be adjusted synchronously. The cutter 702 is a single-edged knife.

[0041] A guide support mechanism 6 is installed on one side of the frame 1 near the bracket, and a transition support mechanism 5 is also installed on the guide support mechanism 6. The guide support mechanism 6 includes a support plate 1, a guide plate 601 and a lifting mechanism 603. Lifting mechanisms 603 are respectively installed at both ends of the support plate 1, and a pair of guide plates 601 are installed on the top of the support plate 1.

[0042] A door liner traction mechanism 4 is slidably arranged on the frame 1, and the door liner traction mechanism 4 includes a second support plate, a clamp 401, a servo motor 402 and a gear 403. The second support plate is detachably mounted with the clamp 401, the second support plate is rotatably connected with a shaft rod, the shaft rod is fixed with a gear 403, and the second support plate is also mounted with a servo motor 402 for driving the shaft rod to rotate.

[0043] The frame 1 is also provided with a material support and unloading mechanism 3, which comprises a material support flap 8 and a material support and unloading mechanism 3. The material support flap 8 adopts a cylinder connecting rod mechanism for controlling the 90-degree rotation of two sets of rotating shafts.

[0044] A frame moving motor 12 is installed on the frame body 2 , and a frame moving screw rod 13 is rotated in the extension direction on the frame 1 . The frame moving motor 12 is used to drive the frame moving screw rod 13 to rotate, and the frame body 2 can be moved on the frame 1 under the drive of the frame moving motor 12 .

[0045] It is necessary to add that:

[0046] The frame 1 and frame body 2 are the supporting structures of the equipment and are composed of steel welded parts, bolts, etc. The height and levelness of the entire frame 1 can be adjusted by adjusting the anchor bolts;

[0047] The frame travel mechanism is composed of a frame moving motor 12 and a frame moving lead screw 13. The frame 1 is connected to the frame body 2 through two sets of linear guide slider structures, and is driven by the frame moving motor 12 and the frame moving lead screw 13. The entire frame 1 can be positioned and moved.

[0048] In order to ensure the flatness of the door liner and the adjustable distance between the blister machine 14 and the equipment, a smooth transition supporting mechanism 5 is designed. Through multiple belts between the door liner guide support mechanism and the blister machine 14 and a counterweight on one side, the supporting length can be automatically adjusted when the frame 1 is moving.

[0049] The guide support mechanism 6 guides the one-piece door liner in a free state after forming through the adjustable side guide plates 601 on both sides. After the guidance, the edge of the door liner is flattened by the pressure head driven by the cylinder to ensure the flatness of the door liner and the accurate positioning of the subsequent clamping claws. The lifting mechanism 603 composed of a cylinder and a guide column is designed on both sides of the support mechanism to control smooth lifting and lowering, and the cylinder stroke is adjusted by screws to ensure that the clamping claw is lifted to make way for the tool holder when clamping, and the clamping claw descends after traction is completed.

[0050] In order to support the blister machine 14 to form two doors at a time and trim at the same time, the tool holder mechanism 7 contains 2 sets of tool holders. When a pair of molds pulls a tab to form a door liner at a time, the first set of tool holders accurately cuts the two end surface wastes of the door liner, and the second set of tool holders is not used. When a pair of connected molds pulls a tab to form two door liners at a time, the first and second sets of tool holders accurately cut the two end surface wastes of the door liners.

[0051] The second set of tool holders is movable and driven by a common motor, sprocket chain and screw drive. Each set of tool holders consists of 2 sets of pressing mechanisms and 2 sets of cutting mechanisms. The lower plate of the pressing plate does not move, and the upper pressing plate is driven downward by a cylinder. The spacing between the upper and lower pressing plates of the 2 sets of pressing plates on a set of tool holders can be adjusted. The adjustment structure of the pressing plates is the same, consisting of 2 sets of coaxial screws and sleeves. When the worker rotates the screw through the tool, the opening and closing of the pressing plates can be adjusted synchronously to adapt to different door liner spacing. The 2 sets of cutting knives on each tool holder are double-edged knives, and the spacing adjustment is the same as the lower pressing plate. The cutting of the door liner is completed by the cutting knives on the chain driven by the motor. After cutting, the waste is blown to the belt line below by the air hole below the waste, and the sheet falls to the belt line below through the upper blowing and gravity.

[0052] The door liner traction mechanism 4 is composed of two groups of jaws 401, a servo motor 402 drive, and two groups of synchronous cylindrical rack gears 403 transmission structures. The jaws 401 adopt a cylinder guide rod structure, and the upper clamp adopts a contoured style to facilitate guiding and positioning to clamp the door liner groove; the door liner plastic sheet suction transmission adopts a servo mechanism, which keeps synchronization with the traction servo to ensure the accuracy of the length direction of the door liner.

[0053] The material support and unloading mechanism 3 is composed of a flip support plate and an unloading belt line. The flip support plate adopts a cylinder connecting rod mechanism to control the two sets of rotating shafts to rotate 90 degrees. The door liner is flattened before cutting and flipped open after cutting. The door liner and the waste edge fall onto the belt line with air blowing and are transmitted to the manual operating table through the belt line. The worker cuts off the side. The belt line adopts aluminum profile components and is driven by a common motor to transmit the chain sprocket.

[0054] Control system: Adopt Mitsubishi FX-5U series programmable control system (PLC), with a Kunluntong touch screen (10 inches) as the human-machine interface to realize system control of the entire equipment, input equipment operating parameters and control instructions, monitor the equipment operating status in real time, and realize automated production through online control of the blister machine. The touch screen is beautiful, reasonable and complete in design, with manual operation, parameter setting (hand-gripping speed, position, etc. can be set), signal monitoring, current alarm, historical alarm and other screens, and the homepage displays actual production data and beat data per hour, etc. The whole machine works in manual / automatic mode, and all manual operations are realized on the touch screen. The system needs to enter the automatic state (button with light) before it can start the cycle operation. When a fault alarm occurs, the automatic state fails and automatically switches to the manual state. It needs to be reset to eliminate the alarm and then restart to enter the automatic state. In case of operating failure, it needs to have a restart function.

[0055] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of application of the present invention should still fall within the scope of the claims of the present invention.

Claims

1. An automatic trimming device for the end of a refrigerator door lining, comprising a frame (1) and a frame body (2), wherein the frame (1) can be moved on the frame body (2) by a movable guide rail assembly, and characterized in that: A vertical frame is slidably mounted on the top of the frame (1) along the length direction, one side of the top of the frame (1) protrudes upward to form a bracket having the same height as the vertical frame, and a knife holder mechanism (7) for cutting waste material from the end surface of the door liner is installed on both the vertical frame and the bracket; The knife frame mechanism (7) comprises a frame, a pressure plate cylinder (701), a cutter (702), a pressure plate (703) and a cutter motor (704); the pressure plate cylinder (701) is vertically fixed on the top of the frame; a group of pressure plates (703) are respectively installed on the frame and at the output end of the pressure plate cylinder (701); the upper and lower groups of pressure plates (703) can be pressed against each other by the pressure plate cylinder (701); a chain assembly and a cutter motor (704) are installed on the frame near the pressure plate (703); the cutter motor (704) is used to drive the chain assembly to move; and the cutter (702) is installed on the chain assembly.

2. The automatic edge-scratching device for the end of the refrigerator door lining according to claim 1 is characterized in that: A screw rod is rotatably connected to the frame body (2), a travel gear (10) is fixed to the end of the screw rod, a travel motor (11) is also fixed to the frame body (2), and the travel motor (11) can drive the screw rod to rotate through the travel gear (10), and the stand is threadedly connected to the screw rod.

3. The automatic edge-scratching device for the end of the refrigerator door lining according to claim 1 is characterized in that: The number of the cutters (702) is also two groups, and both groups of the cutters (702) are connected to the chain assembly.

4. The automatic edge-scratching device for the end of the refrigerator door lining according to claim 1 is characterized in that: The upper and lower groups of pressing plates (703) are both composed of two groups of coaxial screw rods and shaft sleeves. When the screw rods are rotated, the opening and closing of the pressing plates (703) can be adjusted synchronously.

5. The automatic edge-scratching device for the end of the refrigerator door lining according to claim 1 is characterized in that: The cutting knife (702) is a double-edged knife.

6. The automatic edge-scratching device for the end of the refrigerator door lining according to claim 1, characterized in that: The cutting knife (702) is a single-edged knife.

7. The automatic edge-scratching device for the end of the refrigerator door lining according to claim 1, characterized in that: A guide support mechanism (6) is installed on one side of the frame (1) near the bracket, and a transition support mechanism (5) is also installed on the guide support mechanism (6). The guide support mechanism (6) comprises a support plate 1, a guide plate (601) and a lifting mechanism (603). The lifting mechanisms (603) are respectively installed at both ends of the support plate 1, and a pair of guide plates (601) are installed on the top of the support plate 1.

8. The automatic edge-scratching device for the end of the refrigerator door lining according to claim 1, characterized in that: A door bladder traction mechanism (4) is slidably mounted on the frame (1), and the door bladder traction mechanism (4) comprises a second support plate, a clamping claw (401), a servo motor (402) and a gear (403); the second support plate is detachably mounted with the clamping claw (401); the second support plate is rotatably connected with a shaft rod, the shaft rod is fixed with a gear (403); and the second support plate is also mounted with a servo motor (402) for driving the shaft rod to rotate.

9. The automatic edge-scratching device for the end of the refrigerator door lining according to claim 1, characterized in that: The frame (1) is also provided with a material support and unloading mechanism (3), the material support and unloading mechanism (3) comprising a material support flap (8) and the material support and unloading mechanism (3), the material support flap (8) adopts a cylinder connecting rod mechanism, and is used to control the 90-degree rotation of two sets of rotating shafts.

10. The automatic edge-scratching device for the end of the refrigerator door lining according to claim 1, characterized in that: A frame moving motor (12) is installed on the frame body (2), and a frame moving screw rod (13) is rotated in the extension direction on the frame (1). The frame moving motor (12) is used to drive the frame moving screw rod (13) to rotate, and the frame body (2) can be moved on the frame (1) under the drive of the frame moving motor (12).

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