Positioning and punching device for steel machining

Abstract

The utility model discloses a positioning and punching device for steel processing, which comprises a workbench, a mounting frame fixedly connected above the workbench, a punching mechanism arranged above the mounting frame, a longitudinal moving device and a transverse moving device arranged between the punching mechanism and the mounting frame, a transverse positioning device and a longitudinal positioning device arranged on the workbench, and a transverse positioning device arranged on the workbench. The transverse positioning device and the longitudinal positioning device are fixedly connected with a positioning assembly, an avoiding device is arranged above the longitudinal positioning device, the left side, the right side and the rear side of the mounting frame are fixedly connected with baffles, and a transverse rod and a longitudinal rod at the top of the mounting frame are provided with scale marks. The steel with one corner aligned with the initial point of the scale line is transversely and longitudinally positioned and fixed, so that the steel is kept stable in the punching process; and through cooperation of the transverse moving device, the longitudinal moving device and the scale marks, the punching mechanism can be accurately positioned to any position on the steel.

Description

Technical Field

[0001] The utility model relates to the field of steel processing, in particular to a positioning and punching device for steel processing. Background Art

[0002] Steel is a material of certain shape, size and performance made by pressure processing such as steel ingots and steel billets. In the current industrial production and construction industry, the demand for steel is huge. Due to the requirements on process and quality during the use of steel, some steel often needs to be punched.

[0003] The existing punching devices for steel processing will shake during the punching process due to insufficient stability in fixing the steel. In addition, when punching holes in different positions, the positions of the holes are generally observed manually, resulting in low punching accuracy and low product qualification rate. At the same time, debris will be generated during the punching process, and if the debris is not handled in time, it will affect the steel processing. Utility Model Content

[0004] The purpose of the utility model is to provide a positioning punching device for steel processing to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A positioning and punching device for steel processing comprises a workbench, a mounting frame fixedly connected above the workbench, a punching mechanism arranged above the mounting frame, a longitudinal moving device and a transverse moving device capable of moving the punching mechanism longitudinally and transversely arranged between the punching mechanism and the mounting frame, a transverse positioning device and a longitudinal positioning device capable of fixing the steel laterally and longitudinally arranged on the workbench, a positioning assembly fixedly connected to the transverse positioning device and the longitudinal positioning device, an avoidance device capable of avoiding when the steel is placed arranged above the longitudinal positioning device, an avoidance portion capable of allowing the longitudinal positioning device to avoid and stop arranged on the right side of the workbench, a workbench surface composed of a plurality of fixedly connected transverse supporting plates, a chip collecting box for collecting chips arranged under the workbench, a left baffle plate, a right baffle plate and a rear baffle plate fixedly connected to the left side, right side and rear side of the mounting frame, and scale lines arranged on the cross bar and the longitudinal bar at the top of the mounting frame.

[0007] As a further solution of the utility model: a first groove and a second groove are respectively provided on the two longitudinal rods at the top of the mounting frame, a longitudinal moving device is provided above the first groove and the second groove, the longitudinal moving device includes a first screw rod rotatably connected in the first groove, one end of the first screw rod passes through the mounting frame and is fixedly connected to the second motor, the second motor is fixedly connected to the mounting frame, a first screw sleeve is sleeved on the first screw rod, the first screw sleeve is threadedly connected to the first screw rod, a first sliding rod is fixedly connected in the second groove, a first sliding sleeve is sleeved on the first sliding rod, the first sliding sleeve is slidably connected to the first sliding rod, and the first sliding sleeve and the first screw sleeve are fixedly connected to the connecting rod.

[0008] As a further solution of the utility model: a mounting groove is provided in the connecting rod, slide rails are provided on both sides of the mounting groove, a lateral moving device is provided in the mounting groove, the lateral moving device includes a third motor fixedly connected to one end of the mounting groove, a second screw rod is fixedly connected to the output end of the third motor, the other end of the second screw rod is rotatably connected to the mounting groove, a first connecting block is sleeved on the second screw rod, the first connecting block is threadedly connected to the second screw rod, sliders are provided on both sides of the first connecting block, and the sliders are slidably connected to the slide rails.

[0009] As a further solution of the utility model: the punching mechanism includes a first cylinder fixedly connected to the first connecting block, the other end of the first cylinder is fixedly connected to a connecting plate, the other side of the connecting plate is fixedly connected to a first motor, and the output end of the first motor is fixedly connected to a drill bit.

[0010] As a further solution of the utility model: a third groove is provided on the support plate in the middle position, a fourth groove is provided on the support plate on one side of the third groove, and a lateral positioning device is provided on the third groove and the fourth groove. The lateral positioning device includes a third screw rod rotatably connected in the third groove, one end of the third screw rod passes through the workbench and is fixedly connected to the output end of the fourth motor, the fourth motor is fixedly connected to the workbench, a second screw sleeve is sleeved on the third screw rod, the second screw sleeve is rotatably connected to the third screw rod, a second sliding rod is fixedly connected in the fourth groove, a second sliding sleeve is sleeved on the second sliding rod, the second sliding sleeve is slidably connected to the second sliding rod, and a positioning component is fixedly connected to the second sleeve and the second screw sleeve.

[0011] As a further solution of the utility model: a fifth groove is provided at the front end of the workbench, and a avoidance device is provided in the fifth groove. The avoidance device includes a fourth screw rod rotatably connected to the fifth groove, one end of the fourth screw rod passes through the workbench and is fixedly connected to the output end of the fifth motor, the fifth motor is fixedly connected to the workbench, a third screw sleeve is sleeved on the fourth screw rod, a third sliding rod is provided on the other side of the fourth screw rod, the third sliding rod is fixedly connected to the fifth groove, a third sliding sleeve is sleeved on the third sliding rod, and a second connecting block is fixedly connected to the third sliding sleeve and the third screw sleeve.

[0012] As a further solution of the utility model: the longitudinal positioning device includes an electric telescopic rod fixedly connected to the second connecting block, and the other end of the electric telescopic rod is fixedly connected to the positioning assembly.

[0013] As a further solution of the utility model: the positioning assembly includes a mounting plate, a second cylinder and a pressure plate, the mounting plate is an inverted L-shape, a plurality of second cylinders are fixedly connected to the top wall of the mounting plate, and the other end of the second cylinder is fixedly connected to the pressure plate.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows: a positioning and punching device for steel processing, through the coordinated use of a transverse positioning device, a longitudinal positioning device and a positioning assembly, can horizontally and longitudinally position and fix the steel with one corner aligned with the initial point of the scale line, so that the steel remains stable during the punching process; by setting up a transverse moving device, a longitudinal moving device and the coordination of the scale line, the punching mechanism can be accurately positioned at any position on the steel, thereby improving the accuracy and qualified rate of the product; by setting up a support plate and a chip collection box, the debris generated during the steel punching process can fall into the chip collection box, thereby ensuring the cleanliness of the processing environment and facilitating later collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a structural schematic diagram of a positioning and punching device for steel processing.

[0016] Figure 2 The figure is a top view of a mounting frame in a positioning and punching device for steel processing.

[0017] Figure 3 The present invention is a structural schematic diagram of a lateral moving device and a punching mechanism in a positioning and punching device for steel processing.

[0018] Figure 4 It is an enlarged view of the cross-sectional view along the BB direction of a lateral moving device in a positioning and punching device for steel processing.

[0019] Figure 5 It is a cross-sectional view along the AA direction when the steel is in the positioning state in a positioning and punching device for steel processing.

[0020] Figure 6 It is a cross-sectional view along the AA direction when the longitudinal positioning device of a positioning and punching device for steel processing is in an avoidance state.

[0021] In the figure: 1, workbench; 11, avoidance part; 12, support plate; 121, third groove; 122, fourth groove; 13, chip box; 14, fifth groove; 2, mounting frame; 21, left baffle; 22, right baffle; 23, rear baffle; 24, scale line; 25, first groove; 26, second groove; 3, punching mechanism; 31, first cylinder; 32, connecting plate; 33, first motor; 34, drill bit; 4, longitudinal moving device; 41, first screw rod; 42, second motor; 43, first screw sleeve; 44, first slide rod; 45, first slide sleeve; 46, connecting rod; 461, Mounting groove; 462, slide rail; 5, lateral moving device; 51, third motor; 52, second screw rod; 53, first connecting block; 531, slider; 6, lateral positioning device; 61, third screw rod; 62, fourth motor; 63, second screw sleeve; 64, second slide rod; 65, second slide sleeve; 7, longitudinal positioning device; 71, electric telescopic rod; 8, avoidance device; 81, fourth screw rod; 82, fifth motor; 83, third screw sleeve; 84, third slide rod; 85, third slide sleeve; 86, second connecting block; 9, positioning assembly; 91, mounting plate; 92, second cylinder; 93, pressure plate. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figures 1 to 6In the embodiment of the utility model, a positioning and punching device for steel processing includes a workbench 1, a mounting frame 2 is fixedly connected above the workbench 1, a punching mechanism 3 is arranged above the mounting frame 2, a longitudinal moving device 4 and a transverse moving device 5 are arranged between the punching mechanism 3 and the mounting frame 2, a transverse positioning device 6 and a longitudinal positioning device 7 that can fix the steel laterally and longitudinally are arranged on the workbench 1, a positioning assembly 9 is fixedly connected to the transverse positioning device 6 and the longitudinal positioning device 7, a avoidance device 8 that can avoid when the steel is placed is arranged above the longitudinal positioning device 7, an avoidance portion 11 that can allow the longitudinal positioning device 7 to avoid and stop is arranged on the right side of the workbench 1, the table top of the workbench 1 is composed of a plurality of fixedly connected transverse support plates 12, a chip collecting box 13 for collecting debris is arranged under the workbench 1, a left baffle 21, a right baffle 22, and a rear baffle 23 are fixedly connected to the left, right and rear sides of the mounting frame 2, and scale lines 24 are arranged on the top cross bar and the longitudinal bar of the mounting frame 2. When it is necessary to punch holes in the steel, the avoidance device 8 drives the longitudinal positioning device 7 to stop at the avoidance portion 11, and the steel is placed on the table top of the workbench 1, and the front end of the steel is abutted against the rear baffle 23, and the right end is abutted against the right baffle 22, and then the transverse positioning device 6 is started to position the steel transversely. After positioning, the positioning component 9 above it is started, and the avoidance device 8 is started at the same time to drive the longitudinal positioning device 7 to move to the appropriate position, and then the longitudinal positioning device 7 is started to position the steel longitudinally, and the positioning component 9 above it is started; after the steel is positioned, according to the required punching position, the longitudinal moving device 4 and the transverse moving device 5 are started to adjust the position of the punching mechanism 3. During adjustment, the punching position can be accurately determined according to the scale of the scale line 24, and then the punching mechanism 3 is started to punch holes in the steel. The debris generated during the punching process will fall into the chip collection box 13 through the gap between the support plates 12, which is convenient for later collection.

[0024] like Figure 2 As shown, a first groove 25 and a second groove 26 are respectively provided on the two longitudinal rods at the top of the mounting frame 2, and a longitudinal moving device 4 is provided above the first groove 25 and the second groove 26. The longitudinal moving device 4 includes a first screw rod 41 rotatably connected to the first groove 25, one end of the first screw rod 41 passes through the mounting frame 2 and is fixedly connected to the second motor 42, the second motor 42 is fixedly connected to the mounting frame 2, a first screw sleeve 43 is sleeved on the first screw rod 41, the first screw sleeve 43 is threadedly connected to the first screw rod 41, a first sliding rod 44 is fixedly connected in the second groove 26, a first sliding sleeve 45 is sleeved on the first sliding rod 44, the first sliding sleeve 45 is slidably connected to the first sliding rod 44, and the first sliding sleeve 45 and the first screw sleeve 43 are fixedly connected to the connecting rod 46.

[0025] like Figure 3 and Figure 4As shown, a mounting groove 461 is provided in the connecting rod 46, and slide rails 462 are provided on both sides of the mounting groove 461. A lateral moving device 5 is provided in the mounting groove 461, and the lateral moving device 5 includes a third motor 51 fixedly connected to one end of the mounting groove 461, and a second screw rod 52 is fixedly connected to the output end of the third motor 51, and the other end of the second screw rod 52 is rotatably connected to the mounting groove 461, and a first connecting block 53 is sleeved on the second screw rod 52, and the first connecting block 53 is threadedly connected to the second screw rod 52, and sliders 531 are provided on both sides of the first connecting block 53, and the slider 531 is slidably connected to the slide rail 462.

[0026] The punching mechanism 3 includes a first cylinder 31 fixedly connected to the first connecting block 53 , the other end of the first cylinder 31 is fixedly connected to a connecting plate 32 , the other side of the connecting plate 32 is fixedly connected to a first motor 33 , and the output end of the first motor 33 is fixedly connected to a drill bit 34 . When it is necessary to punch holes in the steel, first start the longitudinal moving device 4, start the second motor 42, the second motor 42 drives the first screw rod 41 to rotate, the first screw rod 41 drives the screw sleeve 43 to move, the screw sleeve 43 drives the connecting rod 46 to move in the longitudinal direction, and the parking position of the longitudinal moving device 4 is accurately determined according to the scale lines on the longitudinal rod of the mounting frame 2, and then start the third motor 51, the third motor 51 drives the second screw rod 52 to rotate, the second screw rod 52 drives the first connecting block 53 to move, and the first connecting block 53 drives the punching mechanism 3 to move in the transverse direction, and the parking position of the transverse moving device 5 is accurately determined according to the scale lines on the cross bar of the mounting frame 2. After determining the punching position, start the punching mechanism 3, start the first cylinder 31 and the first motor 33, the first cylinder 31 drives the lower drill bit 34 to move downward, and the first motor 33 drives the drill bit 34 to rotate, thereby punching holes in the steel.

[0027] like Figure 5 , Figure 6As shown, a third groove 121 is provided on the support plate 12 at the middle position, a fourth groove 122 is provided on the support plate 12 on one side of the third groove 121, and a lateral positioning device 6 is provided on the third groove 121 and the fourth groove 122, and the lateral positioning device 6 includes a third screw rod 61 rotatably connected in the third groove 121, one end of the third screw rod 61 passes through the workbench 1 and is fixedly connected to the output end of the fourth motor 62, the fourth motor 62 is fixedly connected to the workbench 1, a second screw sleeve 63 is sleeved on the third screw rod 61, the second screw sleeve 63 is rotatably connected to the third screw rod 61, a second slide rod 64 is fixedly connected in the fourth groove 122, a second slide sleeve 65 is sleeved on the second slide rod 64, the second slide sleeve 65 is slidably connected to the second slide rod 64, and a positioning component 9 is fixedly connected to the second sleeve 65 and the second screw sleeve 63. When the steel needs to be positioned laterally, the fourth motor 62 is started, the fourth motor 62 rotates to drive the third screw rod 61 to rotate, the third screw rod 61 drives the second screw sleeve 63 to move, and the second screw sleeve 63 drives the positioning assembly 9 to move, thereby positioning and fixing the steel laterally.

[0028] A fifth groove 14 is provided at the front end of the workbench 1, and a avoidance device 8 is provided in the fifth groove 14. The avoidance device 8 includes a fourth screw rod 81 rotatably connected to the fifth groove 14, one end of the fourth screw rod 81 passes through the workbench 1 and is fixedly connected to the output end of the fifth motor 82, the fifth motor 82 is fixedly connected to the workbench 1, a third screw sleeve 83 is sleeved on the fourth screw rod 81, a third slide bar 84 is provided on the other side of the fourth screw rod 81, the third slide bar 84 is fixedly connected to the fifth groove 14, a third slide sleeve 85 is sleeved on the third slide bar 84, and a second connecting block 86 is fixedly connected to the third slide sleeve 85 and the third screw sleeve 83. The avoidance device 8 is provided to prevent the longitudinal positioning device 7 from interfering with the steel when placing the steel on the workbench 1, such as Figure 6 As shown, before placing the steel, the avoidance device 8 makes the longitudinal positioning device 7 stop at the avoidance portion 11 to avoid the placement of the steel.

[0029] The longitudinal positioning device 7 includes an electric telescopic rod 71 fixedly connected to the second connecting block 86, and the other end of the electric telescopic rod 71 is fixedly connected to the positioning assembly 9. When the steel needs to be longitudinally positioned, the fifth motor 82 of the avoidance device 8 is started, the fifth motor 82 drives the fourth screw rod 81 to rotate, the fourth screw rod 81 drives the third screw sleeve 83 to move, and the third screw sleeve 83 drives the second connecting block 86 to move to an appropriate position, and then the electric telescopic rod 71 of the longitudinal positioning device 7 is started, and the electric telescopic rod 71 drives the positioning assembly 9 to position and fix the steel.

[0030] The positioning assembly 9 includes a mounting plate 91, a second cylinder 92 and a pressing plate 93. The mounting plate 91 is in an inverted L shape. A plurality of second cylinders 92 are fixedly connected to the top wall of the mounting plate 91. The other end of the second cylinder 92 is fixedly connected to a pressing plate 93. After the lateral positioning device 6 and the longitudinal positioning device 7 drive the mounting plate 91 of the positioning assembly 9 to abut against the steel material for positioning, the second cylinder 92 is started, and the second cylinder 92 drives the pressing plate 93 to abut against the upper surface of the steel material to further fix the steel material and prevent the steel material from shaking during the punching process.

[0031] The working principle of the utility model is as follows: before punching the steel, the avoidance device 8 drives the longitudinal positioning device 7 to stop at the avoidance portion 11 to avoid the placed steel. When punching the steel, the steel is placed on the table top of the workbench 1, the front end of the steel is abutted against the rear baffle 23, and the right end is abutted against the right baffle 22, and then the transverse positioning device 6 is started to position the steel transversely. After positioning, the positioning component 9 above it is started, and the avoidance device 8 is started at the same time to drive the longitudinal positioning device 7 to move to the appropriate position, and then the longitudinal positioning device 7 is started to position the steel longitudinally, and the positioning component 9 above it is started; after the steel is positioned, according to the required punching position, the longitudinal moving device 4 and the transverse moving device 5 are started to adjust the position of the punching mechanism 3. During adjustment, the punching position can be accurately determined according to the scale of the scale line 24, and then the punching mechanism 3 is started to punch the steel. The debris generated during the punching process will fall into the chip collection box 13 through the gap between the support plates 12, which is convenient for later collection.

[0032] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A positioning punching device for steel processing, comprising a workbench (1), characterized in that: A mounting frame (2) is fixedly connected above the workbench (1), a punching mechanism (3) is provided above the mounting frame (2), a longitudinal moving device (4) and a transverse moving device (5) are provided between the punching mechanism (3) and the mounting frame (2) for enabling the punching mechanism (3) to move longitudinally and transversely, a transverse positioning device (6) and a longitudinal positioning device (7) are provided on the workbench (1) for enabling the steel material to be fixed transversely and longitudinally, a positioning assembly (9) is fixedly connected to the transverse positioning device (6) and the longitudinal positioning device (7), and a positioning assembly (9) is provided on the longitudinal positioning device (7). The workbench (1) is provided with an avoidance device (8) for avoiding when placing steel materials, and the right side of the workbench (1) is provided with an avoidance portion (11) for allowing the longitudinal positioning device (7) to avoid and stop. The workbench (1) tabletop is composed of a plurality of fixedly connected transverse support plates (12). A chip collecting box (13) for collecting chips is provided below the workbench (1). The left side, right side and rear side of the mounting frame (2) are fixedly connected with a left baffle plate (21), a right baffle plate (22) and a rear baffle plate (23). The top crossbar and the longitudinal bar of the mounting frame (2) are provided with scale lines (24).

2. A positioning punching device for steel processing according to claim 1, characterized in that: A first groove (25) and a second groove (26) are respectively provided on the two longitudinal rods at the top of the mounting frame (2); a longitudinal moving device (4) is provided above the first groove (25) and the second groove (26); the longitudinal moving device (4) comprises a first screw rod (41) rotatably connected to the first groove (25); one end of the first screw rod (41) passes through the mounting frame (2) and is fixedly connected to the second motor (42); the second motor (42) is fixedly connected to the mounting frame (2); a first screw sleeve (43) is sleeved on the first screw rod (41); the first screw sleeve (43) is threadedly connected to the first screw rod (41); a first sliding rod (44) is fixedly connected in the second groove (26); a first sliding sleeve (45) is sleeved on the first sliding rod (44); the first sliding sleeve (45) is slidably connected to the first sliding rod (44); the first sliding sleeve (45) and the first screw sleeve (43) are fixedly connected to the connecting rod (46).

3. A positioning punching device for steel processing according to claim 2, characterized in that: A mounting groove (461) is provided in the connecting rod (46), and slide rails (462) are provided on both sides of the mounting groove (461) opposite to each other. A lateral moving device (5) is provided in the mounting groove (461), and the lateral moving device (5) comprises a third motor (51) fixedly connected to one end of the mounting groove (461), and the output end of the third motor (51) is fixedly connected to a second screw rod (52), and the other end of the second screw rod (52) is rotatably connected to the mounting groove (461), and a first connecting block (53) is sleeved on the second screw rod (52), and the first connecting block (53) is threadedly connected to the second screw rod (52), and slide blocks (531) are provided on both sides of the first connecting block (53) opposite to each other, and the slide blocks (531) are slidably connected to the slide rails (462).

4. A positioning punching device for steel processing according to claim 3, characterized in that: The punching mechanism (3) comprises a first cylinder (31) fixedly connected to a first connecting block (53); the other end of the first cylinder (31) is fixedly connected to a connecting plate (32); the other side of the connecting plate (32) is fixedly connected to a first motor (33); and the output end of the first motor (33) is fixedly connected to a drill bit (34).

5. A positioning punching device for steel processing according to claim 1, characterized in that: A third groove (121) is provided on the support plate (12) at the middle position, a fourth groove (122) is provided on the support plate (12) on one side of the third groove (121), a transverse positioning device (6) is provided on the third groove (121) and the fourth groove (122), the transverse positioning device (6) comprises a third screw rod (61) rotatably connected in the third groove (121), one end of the third screw rod (61) passes through the workbench (1) and is fixedly connected to the output end of the fourth motor (62), The fourth motor (62) is fixedly connected to the workbench (1); the third screw rod (61) is sleeved with a second screw sleeve (63); the second screw sleeve (63) is rotatably connected to the third screw rod (61); a second slide rod (64) is fixedly connected in the fourth groove (122); a second slide sleeve (65) is sleeved on the second slide rod (64); the second slide sleeve (65) is slidably connected to the second slide rod (64); and a positioning assembly (9) is fixedly connected to the second slide sleeve (65) and the second screw sleeve (63).

6. A positioning punching device for steel processing according to claim 5, characterized in that: A fifth groove (14) is provided at the front end of the workbench (1), and a avoidance device (8) is provided in the fifth groove (14). The avoidance device (8) comprises a fourth screw rod (81) rotatably connected to the fifth groove (14), one end of the fourth screw rod (81) passes through the workbench (1) and is fixedly connected to the output end of a fifth motor (82), the fifth motor (82) is fixedly connected to the workbench (1), a third screw sleeve (83) is sleeved on the fourth screw rod (81), a third slide rod (84) is provided on the other side of the fourth screw rod (81), the third slide rod (84) is fixedly connected to the fifth groove (14), a third slide sleeve (85) is sleeved on the third slide rod (84), and a second connecting block (86) is fixedly connected to the third slide sleeve (85) and the third screw sleeve (83).

7. A positioning punching device for steel processing according to claim 6, characterized in that: The longitudinal positioning device (7) comprises an electric telescopic rod (71) fixedly connected to the second connecting block (86), and the other end of the electric telescopic rod (71) is fixedly connected to a positioning assembly (9).

8. A positioning punching device for steel processing according to claim 7, characterized in that: The positioning assembly (9) comprises a mounting plate (91), a second cylinder (92) and a pressing plate (93); the mounting plate (91) is in an inverted L-shape; a plurality of second cylinders (92) are fixedly connected to the top wall of the mounting plate (91); and the other end of the second cylinder (92) is fixedly connected to the pressing plate (93).

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