Fixed-length cutting device for metal profile machining
By introducing an automatic adjustment limit structure and multi-directional synchronous pressing positioning into the metal profile processing equipment, the problem of low length accuracy of traditional equipment has been solved, achieving high-precision length cutting and stable cutting effect.
Patent Information
- Application Number
- CN202620005045.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-05
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2036-01-05
AI Technical Summary
Traditional length-cutting devices used for metal profile processing lack auxiliary length-cutting and multi-directional anti-shifting structures, resulting in low length-cutting accuracy and easy profile displacement, which affects cutting accuracy and increases the defect rate.
A device was designed that includes a worktable, a cutting disc, a side frame, an electric push rod, a sliding frame, a displacement sensor, and an auxiliary length-fixing component. The device automatically adjusts the limiting structure through the electric push rod and the sensor, and works in conjunction with multi-directional synchronous pressing and positioning to achieve automatic assisted length-fixing of aluminum profiles.
It improves the precision of fixed-length cutting of aluminum profiles, avoids positional movement during the cutting process, enhances the functionality and stability of the device, and adapts to the cutting needs of profiles of different widths.
Smart Images
Figure CN223903022U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to metal section bar processing technical field especially a fixed length cutting device for metal section bar processing. BACKGROUND
[0002] Metal section bar processing, simply speaking, is to process metal raw materials into section bars of specific shape and size through a series of processes, which is used in various fields such as building, machinery manufacturing and electronic equipment. Aluminum section bar is also a kind of metal section bar. When processing aluminum section bar, a fixed length cutting device is needed to accurately segment and cut the aluminum section bar. However, in actual work, we found that the traditional fixed length cutting device for metal section bar processing does not have an auxiliary fixed length and multidirectional anti-shifting structure, and manual fixed length is needed, which leads to low fixed length precision and is more troublesome, and it is easy to cause the aluminum section bar to shift during cutting, thereby directly affecting the fixed length cutting precision of the aluminum section bar and easily increasing the rate of defective products.
[0003] In view of the above problems, the utility model is improved. SUMMARY
[0004] The utility model provides a fixed length cutting device for metal section bar processing, which solves the above problems existing in the use process of the prior art.
[0005] The technical scheme of the utility model is realized as follows: a fixed length cutting device for metal section bar processing, comprising a workbench for placing metal section bars and a cutting disc arranged on the right side of the workbench and used for cutting metal section bars, a side frame is fixed on the right side of the top of the workbench, a first electric push rod is symmetrically embedded in the bottom of the side frame, a side pressing plate for limiting metal section bars is fixed on the piston rod of the first electric push rod, an auxiliary fixed length assembly cooperating with metal section bars is arranged on the side frame and the workbench, the auxiliary fixed length assembly comprises a sliding frame inserted into one side of the top of the side frame and one side of the bottom of the workbench, a limiting side plate is fixed on the side of the sliding frame close to each other, a placing bottom frame for placing metal section bars is rotatably arranged on the top side of the limiting side plate on the sliding frame, a displacement sensor is fixed on the left side of the inner cavity of each group of sliding frames, the displacement sensor is adapted for use with the left side of the side frame and the right side of the inner cavity of the workbench, a second electric push rod is embedded in the front of the top of the side frame and the bottom of the workbench, and the piston rod of the second electric push rod is fixed on the sliding frame through a T-shaped plate.
[0006] The utility model discloses a length cutting device for metal section bar machining as described above further: the auxiliary fixed length assembly still includes the auxiliary board that rotates and is equipped in the front and back of the limiting side plate through the movable seat, one end of the auxiliary board is fixed with the fixed length of the locating pressure column, the right side of the limiting side plate is fixed with the built-in positive and negative screw rod's electric slide rail sliding seat through the support, the electric slide rail sliding seat is fixed with the drive frame through the sliding seat symmetry, the other end of the auxiliary board is provided with the strip -shaped auxiliary groove for the drive frame bottom end and is used to pass through, each group of fixed length locating pressure column all is slidely arranged with the pressure disc, the side of the auxiliary board is fixed with the third electric push rod through the socket, and the piston rod of the third electric push rod is fixed on the pressure disc through the connecting plate.
[0007] The utility model discloses a length cutting device for metal section bar machining as described above further: the right side of the top of the workbench front and back is all fixed with the fixed slide rail, the right side of the workbench is provided with the auxiliary slide that communicates with the fixed slide rail, the sliding frame is slidably arranged in the fixed slide rail and the auxiliary slide, the first motor of output shaft end fixed on the cutting disc is fixed in the sliding frame, and the back of the fixed slide rail is embedded with the auxiliary electric push rod of piston rod fixed on the sliding frame.
[0008] The utility model discloses a length cutting device for metal section bar machining as described above further: the bottom of the placing chassis is fixed with the fixed axle, and the both ends of the fixed axle are rotatably arranged on the lower slide frame, the front of the lower slide frame is fixed with the second motor through the mounting sleeve, the output shaft end of the second motor is fixed on the fixed axle, and the placing chassis is in Z-shaped structure.
[0009] The utility model discloses a length cutting device for metal section bar machining as described above further: the front and back of each group of sliding frame are slidably provided with the strip -shaped sliding frame, the right side of the strip -shaped sliding frame is fixed on the left side of the side frame, the left side of the strip -shaped sliding frame is fixed with the L type support of bottom fixed on the workbench, and the both sides of the strip -shaped sliding frame are fixed in the both sides of the inner chamber of the workbench.
[0010] The utility model discloses a length cutting device for metal section bar machining as described above further: the bottom of the workbench right side is fixed with the extension base, and the bottom of the lower slide frame is slidably arranged on the extension base.
[0011] The utility model discloses a length cutting device for metal section bar machining as described above further: the top of the side frame is embedded with the fourth electric push rod, and the piston rod of the fourth electric push rod is fixed with the T type positive pressure frame.
[0012] The utility model discloses a length cutting device for metal section bar machining as described above further: the top of the side frame is embedded with the fourth electric push rod, and the piston rod of the fourth electric push rod is fixed with the T type positive pressure frame.
[0013] 1. The auxiliary positioning structure of the utility model, can according to the length that aluminum profile needs cutting to move the blocking position structure automatically to the appropriate position in advance, in order to carry out automatic auxiliary fixed length to aluminum profile, cooperate with side pressing plate, and the cutting section of aluminum profile is pressed and positioned in multiple directions simultaneously, can effectively avoid the situation that aluminum profile moves when cutting, improve the fixed length cutting precision of aluminum profile.
[0014] 2. The utility model discloses a fixed slide rail, auxiliary slide, sliding frame and auxiliary electric push rod are set up to control the front and back position of cutting disc freely, and the overall length of auxiliary slide is lengthened by fixed slide rail to expand the moving distance of cutting disc, convenient for adapting to aluminum profile of different width, and the design of first motor is convenient for driving cutting disc rotation and stably cutting aluminum profile.
[0015] 3. The utility model discloses a second motor and fixed shaft are set up to drive the bottom frame of placing rotation, convenient for the quick unloading of aluminum profile after auxiliary cutting, improve the overall functionality of device.
[0016] 4. The utility model discloses a strip shape sliding frame is set up to slide and limit the sliding frame, improve the overall stability of sliding frame when moving, avoid falling down, thereby can directly improve the ranging accuracy of displacement sensor, and the design of L type support can reinforce the upper strip shape sliding frame, improve the overall stability of upper strip shape sliding frame.
[0017] 5. The utility model discloses an extension base is set up to slide and support the lower sliding frame, improve the stability of sliding frame and limit side plate when moving, avoid falling down.
[0018] 6. The utility model discloses a fourth electric push rod and T type positive pressure frame are set up, and cooperate with side pressing plate, can position aluminum profile in multiple directions, improve the overall stability of aluminum profile, avoid its easy to move when cutting. ACCURACY
[0019] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawing needed to be used in the embodiment or prior art description, obviously, the drawing in the following description only some embodiments of the utility model, for ordinary skilled person in the art, under the premise of not paying the creativity labor intensity, still can obtain other drawings according to these drawings.
[0020] Figure 1 It is the overall structure schematic diagram of the utility model;
[0021] Figure 2 It is the overall structure partial section view of the utility model;
[0022] Figure 3The overall structure partial view in elevation of the utility model is shown in Figure 1;
[0023] Figure 4 For Figure 3 The structure enlarged view at A in Figure 2;
[0024] Figure 5 The structure partial sectional view of the utility model workbench and fixed slide rail is shown in Figure 3.
[0025] In the figure: 1, workbench; 2, side frame; 3, first electric push rod; 4, fourth electric push rod; 5, T-shaped positive pressure frame; 6, fixed slide rail; 7, auxiliary slide; 8, sliding frame; 9, first motor; 10, cutting disc; 11, auxiliary electric push rod; 12, sliding frame; 13, displacement sensor; 14, second electric push rod; 15, strip-shaped slide frame; 16, L-shaped support; 17, limiting side plate; 18, placing chassis; 19, auxiliary plate; 20, positioning pressure column; 21, strip-shaped auxiliary groove; 22, electric slide rail sliding seat; 23, driving frame; 24, pressure disc; 25, third electric push rod; 26, second motor; 27, fixed shaft. DETAILED DESCRIPTION
[0026] The utility model will be described below in combination with the drawings of the embodiments of the utility model Figures 1-5 The technical solutions in the embodiments of the utility model are clearly and completely described, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model. EMBODIMENT
[0027] The utility model provides a length -cutting device for metal section bar processing, including the worktable 1 of metal section bar is placed and sets up cutting disc 10 to the right of worktable 1 and cuts the metal section bar, the left side of worktable 1 is provided with controller, the right side of worktable 1 top is fixed with side frame 2, the bottom of side frame 2 is symmetrically embedded with first electric push rod 3, the piston rod of first electric push rod 3 is fixed with the side pressure plate of metal section bar spacing, side frame 2 and worktable 1 are provided with with the auxiliary fixed length subassembly of metal section bar cooperation uses, auxiliary fixed length subassembly includes the sliding frame 12 of inserting in the top one side of side frame 2 and the bottom one side of worktable 1, the side of mutual approach of sliding frame 12 is fixed with the limit side plate 17, the lower sliding frame 12 is rotatably equipped with the placement bogie 18 of top one side sticking on limit side plate 17 and the metal section bar is placed, the left side of the inner chamber of each group sliding frame 12 is fixed with displacement sensor 13, displacement sensor 13 and the left side of side frame 2 and the right side of worktable 1 inner chamber adaptation uses, the top of side frame 2 and the bottom of worktable 1 are embedded with second electric push rod 14, the piston rod of second electric push rod 14 is fixed on sliding frame 12 through T type board, auxiliary fixed length subassembly still includes the auxiliary plate 19 of rotatably equipped in the front and back of limit side plate 17, one end of auxiliary plate 19 is fixed with positioning pressure column 20, the right side of limit side plate 17 is fixed with the electric slide rail sliding seat 22 of built-in positive and negative screw rod through support, the driving frame 23 of driving frame 23 is fixed on electric slide rail sliding seat 22 through slide seat symmetry, the other end of auxiliary plate 19 is provided with strip -shaped auxiliary slot 21 for the bottom end of driving frame 23 penetrates and uses, each positioning pressure column 20 is slidably provided with pressure disc 24, the side of mutual removal of auxiliary plate 19 is fixed with third electric push rod 25 through socket, the piston rod of third electric push rod 25 is fixed on pressure disc 24 through connecting plate.
[0028] The auxiliary positioning structure design can automatically move the blocking and positioning structure to a suitable position according to the length of the aluminum profile to be cut, so as to automatically assist the length cutting of the aluminum profile, and the cutting section of the aluminum profile is simultaneously pressed and positioned in multiple directions by the side pressure plate, so that the position moving of the aluminum profile during cutting is effectively avoided, and the length cutting precision of the aluminum profile is improved.
[0029] The specific use process is as follows: the displacement sensor 13 measures the interval value between the left side of the side frame 2 and the right side of the inner cavity of the workbench 1 in advance, and the distance value between the cutting disc 10 and the limiting side plate 17 is fixed at the initial position, and is recorded in the controller together with the above interval value as an initial value. Subsequently, the user controls the position of the limiting side plate 17 according to the length of the aluminum profile to be cut, at which time the user starts the second electric push rod 14 through the controller, so as to push the sliding frame 12, the limiting side plate 17 and the placing base 18 to move rightward synchronously, and at this time the displacement sensor 13 records the displacement change in real time, until the sum of the displacement difference detected by the displacement sensor 13 and the initial distance value is the same as the length value of the aluminum profile to be cut. At this time, the second electric push rod 14 is turned off to position the limiting side plate 17. Subsequently, the user places the aluminum profile on the workbench 1 and makes one end of the aluminum profile adhere to the limiting side plate 17. At this time, the placing base 18 assists in supporting the aluminum profile. At this time, the user starts the first electric push rod 3, the fourth electric push rod 4, the electric sliding rail sliding seat 22 and the third electric push rod 25 through the controller. At this time, the first electric push rod 3 can drive the side pressing plate to move inward and press and position the side edge of the aluminum profile, and the fourth electric push rod 4 can drive the T-shaped positive pressure frame 5 to move downward and press and position the top of the aluminum profile. At the same time, the electric sliding rail sliding seat 22 can drive the two groups of driving frames 23 to move in opposite directions under the assistance of the internal positive and negative screw rods, so as to drive the auxiliary plate 19 to swing in the opposite direction under the cooperation of the strip-shaped auxiliary groove 21, and until the positioning pressing column 20 adheres to the cutting section of the aluminum profile. At the same time, the third electric push rod 25 can drive the pressing disc 24 to move downward and assist in pressing and fixing the top of the aluminum profile. At this time, the multi-directional synchronous pressing and positioning mode can be used to quickly and stably position the aluminum profile. Subsequently, the user starts the first motor 9 and the auxiliary electric push rod 11 through the controller, so as to drive the cutting disc 10 to rotate and move and cut the aluminum profile. After cutting is completed, the user starts the second motor 26, so as to drive the placing base 18 to flip downward, at which time the positioning pressing column 20 and the pressing disc 24 are reset, so as to make the cut aluminum profile fall quickly.The utility model discloses a set auxiliary fixed length assembly, second electric push rod 14, sliding frame 12, limit side plate 17, the design of placing chassis 18 and displacement sensor 13 can form a set of adjustable blocking limit structure to automatically adjust the position of limit side plate 17 and placing chassis 18 according to the length that aluminium profile needs cutting to automatically assist fixed length of aluminium profile, and the whole process is controlled throughout the journey, is more convenient and accurate, improves fixed length accuracy, the design of electric slide rail sliding seat 22, drive frame 23, strip shape auxiliary groove 21, auxiliary plate 19 and positioning pressure column 20 can carry out synchronous positioning to the side of aluminium profile, and the design of third electric push rod 25 and pressure disc 24 can press and position the top of aluminium profile, at this time, utilize the cutting section of aluminium profile to carry out the multidirectional synchronous press and position mode, and cooperate with side pressure plate, can effectively avoid the situation that aluminium profile appears position shift when cutting, improves the fixed length cutting accuracy of aluminium profile, the design of auxiliary slide 7 can slide and limit sliding frame 8, and the design of auxiliary electric push rod 11 can freely control the front and back position of sliding frame 8 and cutting disc 10, and cooperate with first motor 9, can carry out stable cutting to aluminium profile, and the overall length of auxiliary slide 7 is extended by fixed slide rail 6 to expand the moving distance of cutting disc 10, convenient for adapting aluminium profile of different width, the design of second motor 26 and fixed shaft 27 can drive placing chassis 18 to rotate, convenient for the rapid discharge of aluminium profile after assisting cutting, improves the overall functionality of device, the design of strip shape sliding frame 15 can slide and limit sliding frame 12, improves the overall stability of sliding frame 12 when moving, and can avoid the falling of sliding frame 12, thereby can directly improve the ranging accuracy of displacement sensor 13, and the design of L type support 16 can reinforce upper strip shape sliding frame 15, improves the overall stability of upper strip shape sliding frame 15, the design of extension base can slide and support lower sliding frame 12, improves the stability of sliding frame 12 and limit side plate 17 when moving, avoids the overall falling, the design of fourth electric push rod 4 can move the up-down position of T type positive pressure frame 5 to press and position the top of aluminium profile according to the height of aluminium profile, and cooperate with side pressure plate, can carry out multidirectional positioning to aluminium profile, improves the overall stability of aluminium profile, avoids its easy to move when cutting.
[0030] The right side of the top of the front and back of the workbench 1 is fixed with a fixed slide rail 6, the right side of the workbench 1 is provided with an auxiliary slide 7 in communication with the fixed slide rail 6, the fixed slide rail 6 and the auxiliary slide 7 are slidably provided with a sliding frame 8, the sliding frame 8 is fixed with a first motor 9 with an output shaft end fixed on a cutting disc 10, the back of the back fixed slide rail 6 is embedded with an auxiliary electric push rod 11 with a piston rod fixed on the sliding frame 8.
[0031] Specifically, the design of the auxiliary slide 7 can slide and limit the sliding frame 8, and the design of the auxiliary electric push rod 11 can freely control the front and back positions of the sliding frame 8 and the cutting disc 10, and cooperate with the first motor 9 to stably cut the aluminum profile, and the fixed slide rail 6 extends the overall length of the auxiliary slide 7, so as to expand the moving distance of the cutting disc 10, and facilitate the adaptation of aluminum profiles of different widths.
[0032] The bottom end of the placement chassis 18 is fixed with a fixed shaft 27, and the two ends of the fixed shaft 27 are rotatably arranged on the lower sliding frame 12. The front surface of the lower sliding frame 12 is fixed with a second motor 26 through a mounting sleeve. The output shaft end of the second motor 26 is fixed on the fixed shaft 27. The placement chassis 18 has a Z-shaped structure.
[0033] Specifically, the design of the second motor 26 and the fixed shaft 27 can drive the placement chassis 18 to rotate, facilitate the rapid discharge of the cut aluminum profile, and improve the overall functionality of the device.
[0034] The front and back surfaces of each group of sliding frames 12 are slidably provided with strip-shaped sliding frames 15. The right side of the upper strip-shaped sliding frame 15 is fixed to the left side of the side frame 2. The left sides of the upper strip-shaped sliding frames 15 away from each other are fixed with L-shaped supports 16 fixed at the bottom of the workbench 1. The two sides of the lower strip-shaped sliding frame 15 are fixed on both sides of the inner cavity of the workbench 1.
[0035] Specifically, the design of the strip-shaped sliding frame 15 can slide and limit the sliding frame 12, improve the overall stability of the sliding frame 12 when moving, and avoid the sliding frame 12 from falling, thereby directly improving the ranging accuracy of the displacement sensor 13. The design of the L-shaped support 16 can reinforce the upper strip-shaped sliding frame 15 and improve the overall stability of the upper strip-shaped sliding frame 15.
[0036] The bottom of the right side of the workbench 1 is fixed with an extension base, and the bottom of the lower sliding frame 12 is slidably arranged on the extension base.
[0037] Specifically, the design of the extension base can slide and support the lower sliding frame 12, improve the stability of the sliding frame 12 and the limiting side plate 17 when moving, and avoid the overall falling.
[0038] The top of the side frame 2 is embedded with a fourth electric push rod 4, and the piston rod of the fourth electric push rod 4 is fixed with a T-shaped positive pressure frame 5.
[0039] Specifically, the design of the fourth electric push rod 4 can move the up and down positions of the T-shaped positive pressure frame 5, so as to press and position the top of the aluminum profile according to the height of the aluminum profile, and cooperate with the side pressing plate to position the aluminum profile in multiple directions, improve the overall stability of the aluminum profile, and avoid the aluminum profile from moving easily during cutting.
[0040] It should be noted that the functions of each hardware in the utility model have a large number of mature technologies to support, belong to the prior art, and the essence of the utility model is that the existing hardware and the connecting mode thereof are optimized and combined for specific application occasions to meet the adaptation requirements in specific application occasions and solve the problems in the background art (not related to the improvement of the internal software of the hardware).
[0041] The above merely describes the preferred embodiments of the utility model and is not intended to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A fixed-length cutting device for processing metal profiles, comprising a worktable (1) for placing metal profiles and a cutting disc (10) disposed on the right side of the worktable (1) for cutting the metal profiles, characterized in that: A side frame (2) is fixed to the right side of the top of the workbench (1). A first electric push rod (3) is symmetrically embedded in the bottom of the side frame (2). The piston rod of the first electric push rod (3) is fixed with a side pressure plate for limiting the metal profile. An auxiliary length-fixing assembly for use with the metal profile is provided on the side frame (2) and the workbench (1). The auxiliary length-fixing assembly includes a sliding frame (12) inserted on one side of the top of the side frame (2) and one side of the bottom of the workbench (1). A limit side plate (17) is fixed on the side of the sliding frame (12) that is close to each other. The sliding frame (12) is rotatably mounted with a placement base frame (18) whose top side is attached to the limiting side plate (17) and which places the metal profile. A displacement sensor (13) is fixed on the left side of the inner cavity of each sliding frame (12). The displacement sensor (13) is adapted to the left side of the side frame (2) and the right side of the inner cavity of the worktable (1). A second electric push rod (14) is embedded on the front of the top of the side frame (2) and the bottom of the worktable (1). The piston rod of the second electric push rod (14) is fixed on the sliding frame (12) by a T-shaped plate.
2. The fixed-length cutting device for metal profile processing according to claim 1, characterized in that: The auxiliary length-fixing assembly also includes an auxiliary plate (19) that is rotatably mounted on the front and back of the limiting side plate (17) via a movable seat. One end of the auxiliary plate (19) is fixed with a positioning pressure column (20). The right side of the limiting side plate (17) is fixed with an electric slide rail (22) with built-in positive and negative threaded rods via a bracket. A drive frame (23) is symmetrically fixed on the electric slide rail (22) via the slide rail. The other end of the auxiliary plate (19) is provided with a strip-shaped auxiliary groove (21) for the bottom end of the drive frame (23) to pass through. A pressure plate (24) is slidably arranged on each set of positioning pressure columns (20). A third electric push rod (25) is fixed on the side of the auxiliary plate (19) that is far apart from each other via a socket. The piston rod of the third electric push rod (25) is fixed on the pressure plate (24) via a connecting plate.
3. The fixed-length cutting device for metal profile processing according to claim 1, characterized in that: The workbench (1) has fixed slide rails (6) on the right side of the top of the front and back sides. The workbench (1) has an auxiliary slide rail (7) on the right side that communicates with the fixed slide rail (6). A sliding frame (8) is slidably arranged in the fixed slide rail (6) and the auxiliary slide rail (7). A first motor (9) with the output shaft end fixed on the cutting disc (10) is fixed in the sliding frame (8). An auxiliary electric push rod (11) with a piston rod fixed on the sliding frame (8) is embedded on the back of the fixed slide rail (6) on the back side.
4. The fixed-length cutting device for metal profile processing according to claim 1, characterized in that: The bottom end of the placement base (18) is fixed with a fixed shaft (27), and both ends of the fixed shaft (27) are rotatably mounted on the lower sliding frame (12). The front of the lower sliding frame (12) is fixed with a second motor (26) by a mounting sleeve. The output shaft end of the second motor (26) is fixed on the fixed shaft (27). The placement base (18) has a Z-shaped structure.
5. A fixed-length cutting device for metal profile processing according to claim 1, characterized in that: Each set of sliding frames (12) has a strip-shaped sliding frame (15) slidably arranged on the front and back. The right side of the upper strip-shaped sliding frame (15) is fixed to the left side of the side frame (2). The left side of the upper strip-shaped sliding frame (15) that is far away from each other is fixed with an L-shaped bracket (16) whose bottom end is fixed on the worktable (1). The two sides of the lower strip-shaped sliding frame (15) are fixed to the two sides of the inner cavity of the worktable (1).
6. A fixed-length cutting device for metal profile processing according to claim 1, characterized in that: An extension base is fixed to the bottom right side of the workbench (1), and the bottom of the sliding frame (12) below is slidably mounted on the extension base.
7. A fixed-length cutting device for metal profile processing according to claim 1, characterized in that: The top of the side frame (2) is fitted with a fourth electric push rod (4), and the piston rod of the fourth electric push rod (4) is fixed with a T-shaped positive pressure frame (5).