High-precision refrigerator glass door pressing tool

Abstract

The invention provides a high-precision refrigerator glass door pressing tool, and belongs to the technical field of refrigerator door machining. Comprising a base plate, and a pressing table is arranged on the upper surface of the base plate and used for supporting tempered glass to be pressed with a door body frame; the rack is fixed on one side of the top of the base plate; the downward pressing mechanism is assembled on the rack and used for applying pressure to the tempered glass and the door body frame; the multiple sets of deviation rectifying mechanisms are arranged around the pressing table, and the multiple sets of deviation rectifying mechanisms are used for conducting deviation rectifying alignment on the tempered glass and the door body frame; the feeding mechanism is arranged on one side of the base plate and used for automatic feeding of the tempered glass. Automatic feeding of tempered glass is achieved, manual operation is reduced, the production efficiency is improved, and the labor intensity is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerator door processing, and particularly relates to a high-precision pressing tooling for refrigerator glass doors. Background Art

[0002] As an important part of modern refrigerators, the quality of refrigerator glass doors directly affects the appearance, heat preservation performance and user experience of products. Traditional refrigerator glass doors are usually composed of two layers of tempered glass inside and outside and a door body frame pressed together by an adhesive. It is required that the fitting accuracy between the glass and the door body frame is high and the sealing performance is good to avoid cold air leakage and condensation.

[0003] However, there are still the following deficiencies in the technical implementation of existing glass door pressing toolings: existing toolings mostly rely on manual positioning, which is difficult to ensure the precise alignment of the glass and the door body frame. In addition, the glass material is fragile. When manually adjusting the position of the tempered glass, manual operation is required to move the tempered glass, which is likely to cause scratches or breakage of the glass. At the same time, relying on manual operation, the degree of automation is low, resulting in reduced production efficiency. Therefore, the present application provides a high-precision pressing tooling for refrigerator glass doors to meet the requirements. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a high-precision pressing tooling for refrigerator glass doors to solve the problem of low pressing efficiency of existing refrigerator doors.

[0005] To solve the above technical problem, the present invention provides the following technical solutions:

[0006] A high-precision pressing tooling for refrigerator glass doors, comprising: a substrate, on the upper surface of which a pressing table is provided for supporting the tempered glass and the door body frame for pressing; a frame fixed on one side of the top of the substrate; a downward pressing mechanism assembled on the frame for applying pressure to the tempered glass and the door body frame; a deviation correction mechanism, with multiple groups of deviation correction mechanisms arranged around the pressing table, and the multiple groups of deviation correction mechanisms are used for correcting and aligning the tempered glass and the door body frame; and a feeding mechanism provided on one side of the substrate for automatically loading the tempered glass.

[0007] Optionally, a first vacuum suction cup is embedded on the upper surface of the pressing table, there are multiple first vacuum suction cups, and the multiple first vacuum suction cups are evenly distributed.

[0008] Optionally, the first vacuum suction cup protrudes from the upper surface of the pressing table, and an air joint is provided on the side wall of the pressing table, and the air joint is connected to the multiple first vacuum suction cups.

[0009] Optionally, the top end of the frame is horizontally bent upward toward the pressing table. The downward pressing mechanism includes a hydraulic cylinder vertically assembled on the frame. The telescopic end of the hydraulic cylinder is vertically downward and penetrates through the top end of the frame. A pressing frame is horizontally arranged at the telescopic end of the hydraulic cylinder.

[0010] Optionally, the pressing frame has an "I" - shaped structure, and a plurality of pressing plates are arranged at the bottom of the pressing frame. The plurality of pressing plates are evenly distributed.

[0011] Optionally, the deviation rectifying mechanism includes a slide rail horizontally fixed on the upper surface of the substrate. A sliding seat is horizontally and slidably embedded on the upper surface of the slide rail. A vertical plate is vertically arranged at one end of the sliding seat facing the pressing table. A convex plate is horizontally arranged on one side of the top end of the vertical plate facing the pressing table. A second electric push rod is vertically installed on the convex plate. The telescopic end of the second electric push rod is vertically downward and is equipped with a third vacuum suction cup. An electric cylinder is also installed on the slide rail, and the electric cylinder pushes the sliding seat to move toward the pressing table.

[0012] Optionally, the slide rail is arranged perpendicular to the side surface of the pressing table. A reinforcing plate is fixed between the side surface of the vertical plate and the upper surface of the sliding seat, and the reinforcing plate is arranged in a triangular structure.

[0013] Optionally, the feeding mechanism includes a fixed seat horizontally fixed on the upper surface of the substrate. A column is vertically and rotatably installed on the fixed seat. A cross - arm is horizontally arranged at the top end of the column. A first electric push rod is vertically installed at the end of the cross - arm. The telescopic end of the first electric push rod is vertically downward and is equipped with a second vacuum suction cup. A rotary driving mechanism is arranged on the fixed seat, and the rotary driving mechanism is used to drive the column to rotate. The cross - arm has a telescopic function.

[0014] Optionally, the rotary driving mechanism includes a first motor assembled on the fixed seat and a driven gear disk rotatably installed on the fixed seat. The driven gear disk is coaxially connected to the column. A driving gear is connected to the output shaft of the first motor, and the driving gear meshes with the driven gear disk.

[0015] Optionally, the cross - arm includes a sleeve arm horizontally fixed at the top end of the column. One end of the sleeve arm is movably penetrated by a movable arm. The first electric push rod is vertically installed at one end of the movable arm extending outside the sleeve arm. A lead screw is horizontally and rotatably installed inside the sleeve arm. The inside of the movable arm is hollow and is slidably embedded with a slider. One end of the movable arm extending into the sleeve arm is in threaded connection with the lead screw, and one end of the lead screw extending into the inside of the movable arm is rotatably connected to the slider. A second motor for driving the lead screw to rotate is installed at the end of the sleeve arm.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] In the above solution, the alignment mechanism is used to accurately align the tempered glass and the door frame, ensuring the position accuracy during the pressing process, achieving high-precision pressing of the refrigerator glass door, and improving the product quality.

[0018] The automatic feeding mechanism is used to realize the automatic feeding of the tempered glass, reducing manual operation, improving production efficiency, and lowering labor intensity.

[0019] The hydraulic cylinder is adopted by the downward pressing mechanism to provide a stable downward pressure. With the design of the pressing frame and the pressing plate, it ensures the uniform distribution of pressure during the pressing process, avoiding product deformation or damage.

[0020] The first vacuum sucker set on the pressing table fixes the refrigerator door frame through vacuum adsorption, preventing it from moving during the pressing process, and improving the pressing accuracy and stability.

[0021] The reinforcing plate in the alignment mechanism is set as a triangular structure to enhance the structural stability and ensure the accuracy and reliability during the alignment process.

[0022] The cross arm of the feeding mechanism has a telescopic function, which can adapt to tempered glass of different specifications, improving the versatility and flexibility of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present invention and, together with the specification, are further used to explain the principles of the present invention and enable those skilled in the relevant art to implement and use the present invention.

[0024] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 is a schematic diagram of the structure of the present invention after removing the frame and the downward pressing mechanism;

[0026] Figure 3 is a schematic diagram of the structure of the pressing table of the present invention;

[0027] Figure 4 is a schematic diagram of the structure of the feeding mechanism of the present invention;

[0028] Figure 5 is a schematic diagram of the structure of the rotary drive mechanism of the present invention;

[0029] Figure 6 is a schematic diagram of the structure of the cross arm of the present invention;

[0030] Figure 7 is a schematic diagram of the structure of the alignment mechanism of the present invention;

[0031] Figure 8 is a schematic diagram of the structure of the downward pressing mechanism of the present invention;

[0032] Figure 9 This is a schematic structural diagram of the laminating frame of the present invention.

[0033] Reference numerals:

[0034] 1. Substrate; 2. Laminating table; 3. Frame; 4. Lower pressing mechanism; 5. Deviation rectifying mechanism; 6. Feeding mechanism; 7. First vacuum chuck; 8. Air joint; 9. Fixed seat; 10. Column; 11. Cross arm; 12. First electric push rod; 13. Second vacuum chuck; 14. Rotary drive mechanism; 15. Driven gear disc; 16. First motor; 17. Driving gear; 18. Sleeve arm; 19. Movable arm; 20. Lead screw; 21. Slide block; 22. Second motor; 23. Slide rail; 24. Slide seat; 25. Vertical plate; 26. Convex plate; 27. Second electric push rod; 28. Third vacuum chuck; 29. Electric cylinder; 30. Reinforcing plate; 31. Hydraulic cylinder; 32. Laminating frame; 33. Guide rod; 34. Support plate; 35. Pressing disc.

[0035] As shown in the figure, in order to clearly implement the structure of the embodiments of the present invention, specific structures and devices are marked in the figure, but this is only for schematic needs and is not intended to limit the present invention to this specific structure, device and environment. According to specific needs, those of ordinary skill in the art can adjust or modify these devices and environments. Detailed implementation manners

[0036] The following describes in detail a high-precision refrigerator glass door laminating tooling provided by the present invention in combination with the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative ways for implementation; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0037] It should be noted that in the specification, references to "one embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc. indicate that the described embodiments may include specific features, structures or characteristics, but not necessarily every embodiment includes such specific features, structures or characteristics. Additionally, when combining embodiments to describe specific features, structures or characteristics, implementing such features, structures or characteristics in combination with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the relevant art.

[0038] Generally, terms can be understood at least in part from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or property in the singular sense, or can be used to describe a combination of features, structures, or properties in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey a set of exclusive factors, but rather can alternatively, depending at least in part on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0039] It can be understood that the meanings of "on", "above", and "over" in the present invention should be construed in the broadest manner such that "on" not only means "directly on" something, but also includes the meaning of being "on" something with intervening features or layers therebetween, and "above" or "over" not only means "above" or "over" something, but can also include the meaning of being "above" or "over" something with no intervening features or layers therebetween.

[0040] Furthermore, spatial relative terms such as "beneath", "below", "lower", "above", "upper", etc. are used herein for convenience of description to describe the relationship of one element or feature to another or other elements or features, as shown in the drawings. The spatial relative terms are intended to cover different orientations in the use or operation of the device in addition to the orientation depicted in the drawings. The device can be oriented in other ways, and the spatial relative descriptive terms used herein can be interpreted accordingly.

[0041] As Figure 1 and Figure 2 shown, an embodiment of the present invention provides a high-precision refrigerator glass door pressing tooling, including a substrate 1, a pressing table 2, a frame 3, a downward pressing mechanism 4, a rectifying mechanism 5, and a feeding mechanism 6. A pressing table 2 is provided on the upper surface of the substrate 1 for supporting the tempered glass and pressing it with the door body frame; the frame 3 is fixed on one side of the top of the substrate 1; the downward pressing mechanism 4 is assembled on the frame 3 for applying pressure to the tempered glass and the door body frame; multiple groups of rectifying mechanisms 5 are provided and arranged around the pressing table 2, and the multiple groups of rectifying mechanisms 5 are used for rectifying and aligning the tempered glass and the door body frame; the feeding mechanism 6 is provided on one side of the substrate 1 for automatically loading the tempered glass.

[0042] As Figure 1 、 Figure 2 and Figure 3As shown, a first vacuum suction cup 7 is embedded in the upper surface of the pressing table 2. There are multiple first vacuum suction cups 7, which are evenly distributed. The first vacuum suction cups 7 protrude from the upper surface of the pressing table 2. An air connector 8 is arranged on the side wall of the pressing table 2, and the air connector 8 is connected to the multiple first vacuum suction cups 7. The refrigerator door frame is placed on the pressing table 2. The multiple first vacuum suction cups 7 embedded in the upper surface of the pressing table 2 protrude. By connecting the air connector 8 to an external vacuum device, the refrigerator door frame can be adsorbed to prevent it from moving and improve the stability of pressing.

[0043] As Figure 1 、 Figure 8 and Figure 9 shown, the top end of the frame 3 is horizontally bent upward towards the pressing table 2. The pressing mechanism 4 includes a hydraulic cylinder 31 vertically assembled on the frame 3. The telescopic end of the hydraulic cylinder 31 is vertically downward and penetrates through the top end of the frame 3. A pressing frame 32 is horizontally arranged at the telescopic end of the hydraulic cylinder 31. The pressing frame 32 is in an "I" shape. Multiple pressing plates 35 are arranged at the bottom of the pressing frame 32 and are evenly distributed. Cover the tempered glass on the refrigerator door frame. The hydraulic cylinder 31 extends to push the pressing frame 32 downward, so that the pressing plates 35 apply pressure to the tempered glass and the door frame, and the pressing operation can be completed. A guide rod 33 is vertically fixed on the pressing frame 32, and a support plate 34 is horizontally fixed on one side of the top end of the frame 3. The guide rod 33 movably penetrates through the support plate 34.

[0044] As Figure 1 、 Figure 2 and Figure 7 shown, the alignment mechanism 5 includes a slide rail 23 horizontally fixed on the upper surface of the substrate 1. A slide seat 24 is horizontally and slidably embedded on the upper surface of the slide rail 23. A vertical plate 25 is vertically arranged at one end of the slide seat 24 facing the pressing table 2. A convex plate 26 is horizontally arranged on one side of the top end of the vertical plate 25 facing the pressing table 2. A second electric push rod 27 is vertically installed on the convex plate 26. The telescopic end of the second electric push rod 27 is vertically downward and is installed with a third vacuum suction cup 28. An electric cylinder 29 is also installed on the slide rail 23. The electric cylinder 29 pushes the slide seat 24 to move towards the pressing table 2. The slide rail 23 is arranged perpendicular to the side surface of the pressing table 2. A reinforcing plate 30 is fixed between the side surface of the vertical plate 25 and the upper surface of the slide seat 24. The reinforcing plate 30 is arranged in a triangular structure. Multiple groups of alignment mechanisms 5 are arranged around the pressing table 2 for aligning the tempered glass and the door frame. The electric cylinder 29 pushes the slide seat 24 to move towards the pressing table 2, so that the third vacuum suction cup 28 contacts the tempered glass, and alignment is achieved by adjusting the position. The reinforcing plate 30 is arranged in a triangular structure and is fixed between the side surface of the vertical plate 25 and the upper surface of the slide seat 24, which can enhance the structural stability.

[0045] As Figure 1 、 Figure 2 、 Figure 4 、Figure 5 and Figure 6 As shown in Figure 5 and Figure 6 , the feeding mechanism 6 includes a fixed seat 9 horizontally fixed on the upper surface of the substrate 1. A vertical column 10 is rotatably installed on the fixed seat 9. A cross arm 11 is horizontally arranged at the top of the vertical column 10. A first electric push rod 12 is vertically installed at the end of the cross arm 11. The telescopic end of the first electric push rod 12 is vertically downward and is equipped with a second vacuum suction cup 13. A rotation driving mechanism 14 is arranged on the fixed seat 9. The rotation driving mechanism 14 is used to drive the vertical column 10 to rotate. The cross arm 11 has a telescopic function. The rotation driving mechanism 14 includes a first motor 16 assembled on the fixed seat 9 and a driven gear disk 15 rotatably installed on the fixed seat 9. The driven gear disk 15 is coaxially connected with the vertical column 10. A driving gear 17 is connected to the output shaft of the first motor 16. The driving gear 17 meshes with the driven gear disk 15. The cross arm 11 includes a sleeve arm 18 horizontally fixed at the top of the vertical column 10. One end of the sleeve arm 18 is movably penetrated by a movable arm 19. The first electric push rod 12 is vertically installed at one end of the movable arm 19 extending outside the sleeve arm 18. A lead screw 20 is horizontally rotatably installed in the sleeve arm 18. The inside of the movable arm 19 is hollow and is slidably fitted with a slider 21. One end of the movable arm 19 extending into the sleeve arm 18 is threadedly sleeved with the lead screw 20. One end of the lead screw 20 extending into the inside of the movable arm 19 is rotatably connected with the slider 21. A second motor 22 for driving the lead screw 20 to rotate is installed at the end of the sleeve arm 18. The first motor 16 in the rotation driving mechanism 14 drives the vertical column 10 to rotate through the driving gear 17 and the driven gear disk 15, so that the cross arm 11 rotates above the tempered glass. The first electric push rod 12 extends out, and the second vacuum suction cup 13 adsorbs the tempered glass, and then rotates above the pressing table 2, and places the tempered glass on the refrigerator door frame on the pressing table 2. Among them, the cross arm 11 is composed of a sleeve arm 18 and a movable arm 19. By driving the lead screw 20 to rotate through the second motor 22, the telescopic movement of the movable arm 19 can be realized, so as to adjust the length of the cross arm 11 to adapt to tempered glass of different specifications.

[0046] The working process of the technical solution provided by the present invention is as follows:

[0047] The high-precision refrigerator glass door pressing tooling mainly includes a substrate 1, a pressing table 2, a frame 3, a downward pressing mechanism 4, a deviation correction mechanism 5, a feeding mechanism 6, etc. Each part works together to achieve the precise pressing of the refrigerator glass door. The specific working principle is as follows:

[0048] In the feeding stage, first place the refrigerator door body frame on the pressing table 2. The multiple first vacuum suckers 7 embedded in the upper surface of the multiple pressing tables 2 protrude, and are connected to an external vacuum device through the air connector 8 to adsorb the refrigerator door body frame and prevent it from moving. The feeding mechanism 6 is responsible for the automatic feeding of the tempered glass. Specifically, the first motor 16 in the rotary drive mechanism 14 drives the column 10 to rotate through the driving gear 17 and the driven gear disc 15, so that the cross arm 11 rotates above the tempered glass. The first electric push rod 12 extends, and the second vacuum sucker 13 adsorbs the tempered glass, and then rotates above the pressing table 2 to place the tempered glass on the refrigerator door body frame on the pressing table 2. Among them, the cross arm 11 is composed of a sleeve arm 18 and a movable arm 19. By driving the screw rod 20 to rotate through the second motor 22, the telescopic movement of the movable arm 19 can be realized, so as to adjust the length of the cross arm 11 to adapt to tempered glass of different specifications.

[0049] Deviation correction and alignment stage: Multiple groups of deviation correction mechanisms 5 are arranged around the pressing table 2 for deviation correction and alignment of the tempered glass and the door body frame. The electric cylinder 29 pushes the sliding seat 24 to move towards the pressing table 2, so that the third vacuum sucker 28 contacts the tempered glass, and deviation correction and alignment are achieved by adjusting the position. The reinforcing plate 30 is set in a triangular structure and is fixed between the side surface of the vertical plate 25 and the upper surface of the sliding seat 24 to enhance the structural stability.

[0050] Compared with the traditional method of manually feeding and correcting the deviation of the tempered glass, it avoids the phenomenon that the glass is easily scratched by the staff or the glass is broken. Moreover, this automatic feeding and deviation correction method for tempered glass has a high degree of automation and improves the processing efficiency.

[0051] Pressing stage: The hydraulic cylinder 31 extends to push the pressing frame 32 to move downward, so that the pressing disc 35 applies pressure to the tempered glass and the door body frame to complete the pressing operation. During the pressing process, since the refrigerator door body frame is adsorbed and fixed by multiple first vacuum suckers 7, the stability of the pressing is improved.

[0052] The present invention covers any alternatives, modifications, equivalent methods and solutions made within the essence and scope of the present invention. In order to enable the public to have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention. However, those skilled in the art can fully understand the present invention without these detailed descriptions. In addition, in order to avoid unnecessary confusion to the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0053] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A high-precision press-fitting tooling for refrigerator glass doors, characterized in that, Including: A substrate, on the upper surface of which a pressing table is provided for supporting and pressing the tempered glass and the door frame; A frame fixed to one side of the top of the substrate; A downward pressing mechanism assembled on the frame for applying pressure to the tempered glass and the door frame; A rectifying mechanism, with multiple groups of rectifying mechanisms arranged around the pressing table, and the multiple groups of rectifying mechanisms are used for rectifying and aligning the tempered glass and the door frame; A feeding mechanism arranged on one side of the substrate for automatically loading the tempered glass.

2. The high-precision refrigerator glass door pressing tooling according to claim 1, characterized in that A first vacuum sucker is embedded on the upper surface of the pressing table, and there are multiple first vacuum suckers, and the multiple first vacuum suckers are evenly distributed.

3. The high-precision refrigerator glass door pressing tooling according to claim 2, characterized in that, The first vacuum sucker protrudes from the upper surface of the pressing table, and an air joint is arranged on the side wall of the pressing table, and the air joint is connected to the multiple first vacuum suckers.

4. The high-precision refrigerator glass door pressing tooling according to claim 1, characterized in that, The top end of the frame is horizontally bent upward toward the pressing table. The downward pressing mechanism includes a hydraulic cylinder vertically assembled on the frame. The telescopic end of the hydraulic cylinder is vertically downward and penetrates the top end of the frame. A pressing frame is horizontally arranged at the telescopic end of the hydraulic cylinder.

5. The high-precision refrigerator glass door pressing tooling according to claim 4, wherein, The pressing frame is in an "I" shape structure, and multiple pressing plates are arranged at the bottom of the pressing frame, and the multiple pressing plates are evenly distributed.

6. The high-precision refrigerator glass door pressing tooling according to claim 1, characterized in that The rectifying mechanism includes a slide rail horizontally fixed on the upper surface of the substrate. A slide seat is horizontally and slidably embedded on the upper surface of the slide rail. A vertical plate is vertically arranged at one end of the slide seat facing the pressing table. A convex plate is horizontally arranged on one side of the top end of the vertical plate facing the pressing table. A second electric push rod is vertically installed on the convex plate. The telescopic end of the second electric push rod is vertically downward and is equipped with a third vacuum sucker. An electric cylinder is also installed on the slide rail, and the electric cylinder pushes the slide seat to move toward the pressing table.

7. The high-precision refrigerator glass door pressing tooling according to claim 6, characterized in that, The slide rail is arranged perpendicular to the side surface of the pressing table, and a reinforcing plate is fixed between the side surface of the vertical plate and the upper surface of the slide seat, and the reinforcing plate is arranged in a triangular structure.

8. The high-precision refrigerator glass door pressing tooling according to claim 1, wherein The feeding mechanism includes a fixed seat horizontally fixed on the upper surface of the substrate. A column is vertically and rotatably installed on the fixed seat. A cross arm is horizontally arranged at the top end of the column. A first electric push rod is vertically installed at the end of the cross arm. The telescopic end of the first electric push rod is vertically downward and is equipped with a second vacuum sucker. A rotation driving mechanism is arranged on the fixed seat, and the rotation driving mechanism is used to drive the column to rotate, and the cross arm has a telescopic function.

9. The high-precision refrigerator glass door pressing tooling according to claim 8, characterized in that The rotation driving mechanism includes a first motor assembled on the fixed seat and a driven gear disk rotatably installed on the fixed seat. The driven gear disk is coaxially connected with the column. A driving gear is connected to the output shaft of the first motor, and the driving gear meshes with the driven gear disk.

10. The high-precision refrigerator glass door pressing tooling according to claim 8, characterized in that, The cross arm includes a sleeve arm horizontally fixed at the top end of the column. One end of the sleeve arm is movably penetrated by a movable arm. The first electric push rod is vertically installed at one end of the movable arm extending outside the sleeve arm. A lead screw is horizontally and rotatably installed in the sleeve arm. The inside of the movable arm is hollow and a slider is slidably embedded in it. One end of the movable arm extending into the sleeve arm is threadedly sleeved with the lead screw. One end of the lead screw extending into the inside of the movable arm is rotatably connected with the slider. A second motor for driving the lead screw to rotate is installed at the end of the sleeve arm.

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