An automatic tube bending machine for heat exchanger core outlet tubes

Abstract

The present invention discloses an automatic bending and forming machine for heat exchanger core lead-out pipes, comprising a frame, a lateral moving mechanism is fixed on the top surface of the top plate of the frame, a horizontal moving plate is fixed on the top surface of the moving block of the lateral moving mechanism, a vertical supporting seat is fixed on the top surface of the horizontal moving plate, a rotating driving motor is fixed on the rear wall surface of the vertical supporting seat, the end of the output shaft of the rotating driving motor extends out of the front wall surface of the vertical supporting seat and is fixed with a rotating plate, a clamping mechanism is installed on the rotating plate, and the heat exchanger to be processed is clamped on the clamping mechanism; after the heat exchange tube core is clamped and fixed, the machine can automatically bend its lead-out pipe as needed, and has a high degree of automation and a good bending effect, without the need for manual bending.

Description

Technical field:

[0001] The invention relates to the technical field of heat exchanger processing equipment, and more specifically to an automatic bending and forming machine for a heat exchanger core outlet pipe. Background technology:

[0002] The outlet pipe of the existing heat exchanger core needs to be bent multiple times according to the design requirements. The existing method is to manually install it on a pipe bending machine and manually bend the pipe, which has poor effect and low efficiency. The manual operation is troublesome and inefficient. Summary of the invention:

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an automatic bending machine for heat exchanger core outlet pipes, which can clamp and fix the heat exchange tube core and automatically bend the outlet pipes as needed. It has a high degree of automation and good bending effect, and does not require manual bending.

[0004] The solution of the present invention to solve the technical problem is:

[0005] A heat exchanger core outlet pipe automatic bending forming machine comprises a frame, a lateral moving mechanism is fixed on the top surface of the top plate of the frame, a horizontal moving plate is fixed on the top surface of the moving block of the lateral moving mechanism, a vertical support seat is fixed on the top surface of the horizontal moving plate, a rotary drive motor is fixed on the rear wall surface of the vertical support seat, an end of the output shaft of the rotary drive motor extends out of the front wall surface of the vertical support seat and is fixed with a rotary plate, a clamping mechanism is installed on the rotary plate, and a heat exchanger to be processed is clamped on the clamping mechanism;

[0006] A front top plate is fixed on the front top surface of the frame, an intermediate support frame is fixed on the middle of the top surface of the front top plate, a bending and rotating servo motor is fixed on the bottom surface of the rear top plate of the intermediate support frame, the top end of the output shaft of the bending and rotating servo motor extends out of the top surface of the top plate of the intermediate support frame and is fixed with a driving gear, a vertical main rotating shaft is fixed on the front top plate top surface of the intermediate support frame, a circular or semicircular column is formed on the top of the vertical main rotating shaft, an annular groove or an arc groove matching the lead-out pipe of the heat exchanger core is formed on the outer wall of the column, a transmission gear is movably connected to the lower part of the vertical main rotating shaft through a bearing, the driving gear is meshed with the transmission gear, a horizontal connecting frame is fixed on the top surface of the transmission gear, a center through groove is formed in the middle of the horizontal connecting frame, a right connecting frame is fixed on the right end of the horizontal connecting frame, a horizontal pushing cylinder is fixed on the upper part of the right side wall of the vertical plate of the right connecting frame, and the end of the push rod of the horizontal pushing cylinder extends out of the left side wall of the vertical plate of the right connecting frame;

[0007] The top surface of the horizontal connecting frame is pressed against the main moving block, and a downwardly extending raised sliding portion is formed in the middle of the bottom surface of the main moving block. The raised sliding portion is inserted into the central through groove and moves left and right along the central through groove. A vertical clamping rod is fixed on the top surface of the main moving block, and a bending portion extending leftward is formed on the top of the vertical clamping rod. An arc-shaped clamping groove is formed on the left end of the bending portion, and the arc-shaped clamping groove corresponds to the annular groove or the arc groove. The end of the push rod of the horizontal pushing cylinder faces the right side wall of the vertical clamping rod.

[0008] The right side of the main moving block is hinged with a first rotating arm through a hinge shaft, a right connecting block is fixed to the top surface of the right end of the horizontal connecting frame, and the right connecting block is movably connected with a second rotating arm through a hinge shaft, and the bottom of the horizontal connecting frame is hinged with a bottom pushing cylinder through a hinge shaft, and the top end of the push rod of the bottom pushing cylinder is movably connected with a lifting seat through a hinge shaft, and the lifting seat is inserted in the central through groove, and one end of the first rotating arm and one end of the second rotating arm are connected to the hinge shaft and movably connected to the upper part of the lifting seat.

[0009] A connecting support frame is fixed to the right top surface of the front top plate, an auxiliary pushing cylinder is fixed to the upper part of the connecting support frame, an end plate is fixed to the left end surface of the auxiliary pushing cylinder, the end of the push rod of the auxiliary pushing cylinder extends out of the end plate and is fixed to the pushing plate, and an auxiliary rod extending to the left is formed on the left end surface of the pushing plate, and an end arc groove corresponding to the annular groove or the arc groove is formed on the left end of the auxiliary rod.

[0010] A guide rod is fixed on the right side wall of the push plate, and the guide rod is inserted into a guide through hole formed on the end plate.

[0011] The lateral movement mechanism includes a lateral adjustment screw fixed to the middle part of the top surface of the top plate of the frame, connecting seats are fixed on the left and right parts of the top plate, the lateral adjustment screw is movably connected to the two connecting seats through bearings, the right end of the lateral adjustment screw extends out of the right connecting seat, a motor seat is fixed to the right end of the top surface of the top plate of the frame, a mobile servo motor is fixed on the motor seat, and the output shaft of the mobile servo motor is connected to the right end of the lateral adjustment screw through a coupling.

[0012] The left and right parts of the top surface of the top plate of the frame are fixed with transverse guide rails, the left and right parts of the bottom surface of the horizontal movable plate are fixed with guide sliders, and the transverse guide rails are inserted into the corresponding sliding grooves formed on the bottom surface of the guide sliders.

[0013] The clamping mechanism includes a right auxiliary baffle fixed on the right side of the front wall surface of the rotating plate, a positioning block is fixed on the left side of the lower part of the front wall surface of the rotating plate, a waist-shaped groove is formed on the front wall surface of the positioning block, and one of the U-shaped connectors extending from the rear end of the heat exchanger core to be processed is inserted into the corresponding waist-shaped groove.

[0014] A bending rod is hinged at the left side of the front part of the rotating plate, a left auxiliary plate is fixed to the right side of the front end of the bending rod, and an upper bending part extending to the right is formed on the top surface of the left auxiliary plate.

[0015] The front end of a compression spring is fixed on the rear wall surface of the rear bending rod portion of the bending rod, and the rear end of the compression spring is fixed on the front wall surface of the rotating plate;

[0016] A handle is fixed on the left side wall of the middle part of the bending rod.

[0017] The front wall surface of the rotating plate is formed with a plurality of long through slots, and the right auxiliary baffle is fixedly connected to the rotating plate by bolts, and the screw rod portion of the bolt is inserted into the long through slots.

[0018] The outstanding effects of the present invention are:

[0019] Compared with the prior art, it can clamp and fix the heat exchange tube core body, and then automatically bend the lead-out tube as needed. It has a high degree of automation, good bending effect, and no manual bending is required.

[0020] The bending effect of heat exchange tube cores of large quantities of the same type is better and the efficiency is higher. Description of the drawings:

[0021] Figure 1 It is a partial structural schematic diagram of the present invention;

[0022] Figure 2 It is a partial structural schematic diagram of the rear part of the present invention;

[0023] Figure 3 It is a partial structural schematic diagram of the front part of the present invention;

[0024] Figure 4 is a partial cross-sectional view of the front portion of the present invention;

[0025] Figure 5 It is a partial structural schematic diagram of the clamping mechanism of the present invention;

[0026] Figure 6 is a partial top view of the front portion of the present invention;

[0027] Figure 7 is a partial top view of the horizontal connecting frame at the front of the present invention;

[0028] Figure 8 is a partial top view of the mobile servo motor of the present invention;

[0029] Fig. 9 It is a partial top view of the clamping mechanism. Specific implementation method:

[0030] For example, see Figures 1 to 9 As shown, an automatic bending and forming machine for heat exchanger core outlet pipes comprises a frame 10, a lateral moving mechanism 20 is fixed on the top surface of the top plate of the frame 10, a horizontal moving plate 22 is fixed on the top surface of the moving block 21 of the lateral moving mechanism 20, a vertical support seat 23 is fixed on the top surface of the horizontal moving plate 22, a rotary drive motor 24 is fixed on the rear wall surface of the vertical support seat 23, an end of the output shaft of the rotary drive motor 24 extends out of the front wall surface of the vertical support seat 23 and is fixed with a rotary plate 25, a clamping mechanism 30 is installed on the rotary plate 25, and a heat exchanger 100 to be processed is clamped on the clamping mechanism 30;

[0031] A front top plate 11 is fixed to the front top surface of the frame 10, an intermediate support frame 12 is fixed to the middle of the top surface of the front top plate 11, a bending rotation servo motor 13 is fixed to the bottom surface of the rear top plate of the intermediate support frame 12, the top end of the output shaft of the bending rotation servo motor 13 extends out of the top plate top surface of the intermediate support frame 12 and is fixed with a driving gear 14, a vertical main rotating shaft 15 is fixed to the top surface of the front top plate of the intermediate support frame 12, a circular or semicircular column 16 (a semicircular column 16 in the present embodiment) is formed on the top of the vertical main rotating shaft 15, and a heat exchanger core is formed on the outer wall of the column 16 The annular groove or arc groove (arc groove in this embodiment) matched with the lead-out pipe 101 of 100, the lower part of the vertical main rotating shaft 15 is movably connected with a transmission gear 151 through a bearing, the driving gear 14 is meshed with the transmission gear 151, the top surface of the transmission gear 151 is fixed with a horizontal connecting frame 17, the middle part of the horizontal connecting frame 17 is formed with a central through groove 171, the right end of the horizontal connecting frame 17 is fixed with a right connecting frame 18, the upper part of the right side wall of the vertical plate of the right connecting frame 18 is fixed with a horizontal pushing cylinder 19, and the end of the push rod of the horizontal pushing cylinder 19 extends out of the left side wall of the vertical plate of the right connecting frame 18;

[0032] The top surface of the horizontal connecting frame 17 is pressed against the main moving block 40, and a downward extending raised sliding portion 41 is formed in the middle of the bottom surface of the main moving block 40. The raised sliding portion 41 is inserted into the central through groove 171, and the side walls on the front and rear sides of the raised sliding portion 41 are close to the inner wall of the central through groove 171, and it can move left and right along the central through groove 171. A vertical clamping rod 42 is fixed to the top surface of the main moving block 40, and a bending portion 43 extending to the left is formed on the top of the vertical clamping rod 42. The left end of the bending portion 43 is formed with an arc-shaped clamping groove, which corresponds to the annular groove or the arc groove. The end of the push rod of the horizontal pushing cylinder 19 faces the right side wall of the vertical clamping rod 42.

[0033] Furthermore, the right side of the main moving block 40 is hinged with a first rotating arm 44 through a hinge shaft, a right connecting block 172 is fixed to the top surface of the right end of the horizontal connecting frame 17, and the right connecting block 172 is movably connected with a second rotating arm 45 through a hinge shaft, and the bottom of the horizontal connecting frame 17 is hinged with a bottom pushing cylinder 46 through a hinge shaft, and the top end of the push rod of the bottom pushing cylinder 46 is movably connected to a lifting seat 47 through a hinge shaft, and the lifting seat 47 is inserted into the center through groove 171, and one end of the first rotating arm 44 and one end of the second rotating arm 45 are connected to the hinge shaft and movably connected to the upper part of the lifting seat 47.

[0034] Furthermore, a connecting support frame 111 is fixed to the right top surface of the front top plate 11, an auxiliary pushing cylinder 112 is fixed to the upper part of the connecting support frame 111, an end plate 113 is fixed to the left end surface of the auxiliary pushing cylinder 112, the end of the push rod of the auxiliary pushing cylinder 112 extends out of the end plate 113 and is fixed to a pushing plate 114, and the left end surface of the pushing plate 114 is formed with an auxiliary rod 115 extending to the left, and the left end of the auxiliary rod 115 is formed with an end arc groove corresponding to the annular groove or the arc groove.

[0035] Furthermore, a guide rod 116 is fixed on the right side wall of the push plate 114 , and the guide rod 116 is inserted into a guide through hole formed on the end plate 113 .

[0036] Furthermore, the lateral movement mechanism 20 includes a lateral adjustment screw 26 fixed to the middle part of the top surface of the top plate of the frame 10, and connecting seats are fixed to the left and right parts of the top plate. The lateral adjustment screw 26 is movably connected to the two connecting seats through bearings, and the right end of the lateral adjustment screw 26 extends out of the right connecting seat. A motor seat 27 is fixed to the right end of the top surface of the top plate of the frame 10, and a mobile servo motor 28 is fixed on the motor seat 27. The output shaft of the mobile servo motor 28 is connected to the right end of the lateral adjustment screw 26 through a coupling.

[0037] Furthermore, transverse guide rails 1 are fixed to the left and right parts of the top surface of the top plate of the frame 10, and guide sliders 2 are fixed to the left and right parts of the bottom surface of the horizontal movable plate 22. The transverse guide rails 1 are inserted into the slide grooves formed on the bottom surfaces of the corresponding guide sliders 2.

[0038] Furthermore, the clamping mechanism 30 includes a right-side auxiliary baffle 31 fixed to the right side of the front wall surface of the rotating plate 25, a positioning block 32 is fixed to the left side of the lower part of the front wall surface of the rotating plate 25, and a waist-shaped groove 33 is formed on the front wall surface of the positioning block 32. One of the U-shaped connectors extending from the rear end of the heat exchanger core 100 to be processed is inserted into the corresponding waist-shaped groove 33.

[0039] Furthermore, a bending rod 251 is hinged on the left side of the front of the rotating plate 25, a left auxiliary plate 252 is fixed to the right side of the front end of the bending rod 251, and an upper bending portion 253 extending to the right is formed on the top surface of the left auxiliary plate 252.

[0040] Furthermore, the front end of the compression spring 254 is fixed to the rear wall surface of the rear bending rod portion of the bending rod 251, and the rear end of the compression spring 254 is fixed to the front wall surface of the rotating plate 25;

[0041] A handle 255 is fixed on the left side wall of the middle portion of the bending rod 251 .

[0042] Furthermore, a plurality of elongated through slots are formed on the front wall surface of the rotating plate 25, and the right auxiliary baffle plate 31 is fixedly connected to the rotating plate 25 by bolts, and the screw parts of the bolts are inserted into the elongated through slots.

[0043] When the present embodiment is used, the heat exchanger core 100 to be processed is first installed on the clamping mechanism 30 of the rotating plate 25, the handle 255 is first held, the left auxiliary plate 252 is turned outward, one of the U-shaped connectors extending from the rear end of the heat exchanger core 100 to be processed is inserted into the corresponding waist-shaped groove 33, and the right side wall of the heat exchanger core 100 is pressed against the corresponding right auxiliary baffle 31. The position of the right auxiliary baffle 31 can be adjusted by loosening the corresponding bolt, and then the screw of the bolt is moved along the elongated through groove, so that the right auxiliary baffle 31 moves left and right along the elongated through groove. After adjusting it to the corresponding position, the bolt is tightened to adjust the position of the right auxiliary baffle 31.

[0044] Then, the left auxiliary plate 252 is flipped back forward, and through the action of the compression spring 254, the left auxiliary plate 252 is pressed against the corresponding side wall of the heat exchanger core 100, so that the heat exchanger core 100 is clamped between the left auxiliary plate 252 and the right auxiliary baffle 31 to achieve clamping and fixing.

[0045] Then, by moving the servo motor 28, the lateral adjustment screw 26 rotates, and the rotating plate 25 moves forward and backward. At this time, it moves forward, so that the front end of the lead-out pipe 101 of the heat exchanger core 100 extends out of the arc groove, and the bending part is in the arc groove. Then, by pushing the push rod of the lateral pushing cylinder 19, the end of the push rod of the lateral pushing cylinder 19 presses against and pushes the vertical clamping rod 42, and by pushing the push rod of the bottom pushing cylinder 46, the lifting seat 47 is lifted, so that the vertical clamping rod 42 moves to the left, so that the part of the lead-out pipe 101 in the arc groove is also in the arc clamping groove formed at the left end of the bending part 43. Then, by pushing the push rod of the auxiliary pushing cylinder 112, the part at the rear of the bending part of the lead-out pipe 101 is in the end arc groove at the left end of the auxiliary rod 115, and its outer side wall is close to the inner side wall of the end arc groove to achieve compression and fixation.

[0046] Then, the bending and rotating servo motor 13 is operated to make the driving gear 14 rotate, driving the transmission gear 151 to rotate, so that the vertical clamping rod 42 rotates along the vertical main shaft 15, thereby making the bending part 43 rotate along the arc groove, and the part of the lead-out tube 101 in the arc groove rotates with the bending part 43 and is bent along the arc groove.

[0047] After the bending is completed, the push rod of the bottom push cylinder 46 is retracted, and the push rod of the lateral push cylinder 19 is retracted to realize the return of the vertical clamping rod 42. At the same time, the push rod of the auxiliary push cylinder 112 is returned, and then, the servo motor 28 is moved to operate to move the lead-out pipe 101 forward, so that the subsequent bending part is in the arc groove. According to the requirements of the bending direction, the rotating drive motor 24 can be operated to rotate the rotating plate 25 to rotate the moving angle, and the heat exchanger core 100 is rotated to the moving angle. Then, the bending operation is performed as before, which is a multiple bending process with good effect. Moreover, the bending steps can be input into the control software in the control host as needed. The control host controls the movement of the servo motor 28, the rotation drive motor 24, and the operation of the control valve of the pneumatic system in corresponding time periods, so that the lateral push cylinder 19, the bottom push cylinder 46, and the auxiliary push cylinder 112 can perform relative actions at corresponding times (the control host, the pneumatic system and its related control software can be purchased directly on the market and will not be described in detail), thereby realizing the continuous bending processing of the lead-out pipe 101 of the heat exchanger core 100, which has good effect, high efficiency and high degree of automation.

[0048] Finally, the above implementation modes are only used to illustrate the present invention, and are not intended to limit the present invention. Ordinary technicians in the relevant technical field may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also belong to the scope of the present invention. The scope of patent protection of the present invention should be defined by the claims.

Claims

1. An automatic tube bending and forming machine for a heat exchanger core outlet tube, comprising a frame (10), characterized in that: A lateral moving mechanism (20) is fixed on the top surface of the top plate of the frame (10), a horizontal moving plate (22) is fixed on the top surface of the moving block (21) of the lateral moving mechanism (20), a vertical supporting seat (23) is fixed on the top surface of the horizontal moving plate (22), a rotary drive motor (24) is fixed on the rear wall surface of the vertical supporting seat (23), the end of the output shaft of the rotary drive motor (24) extends out of the front wall surface of the vertical supporting seat (23) and is fixed with a rotary plate (25), a clamping mechanism (30) is installed on the rotary plate (25), and the heat exchanger (100) to be processed is clamped on the clamping mechanism (30); A front top plate (11) is fixed to the front top surface of the frame (10), an intermediate support frame (12) is fixed to the middle of the top surface of the front top plate (11), a bending rotation servo motor (13) is fixed to the bottom surface of the rear top plate of the intermediate support frame (12), the top end of the output shaft of the bending rotation servo motor (13) extends out of the top surface of the top plate of the intermediate support frame (12) and is fixed with a driving gear (14), a vertical main rotating shaft (15) is fixed to the top surface of the front top plate of the intermediate support frame (12), a column (16) is formed on the top of the vertical main rotating shaft (15), and an outer wall of the column (16) is formed with a lead-out hole for connecting to the heat exchanger core (100) The lower part of the vertical main rotating shaft (15) is movably connected with a transmission gear (151) through a bearing, the driving gear (14) is meshed with the transmission gear (151), a horizontal connecting frame (17) is fixed on the top surface of the transmission gear (151), a central through groove (171) is formed in the middle of the horizontal connecting frame (17), a right connecting frame (18) is fixed on the right end of the horizontal connecting frame (17), a horizontal pushing cylinder (19) is fixed on the upper part of the right side wall of the vertical plate of the right connecting frame (18), and the end of the push rod of the horizontal pushing cylinder (19) extends out of the left side wall of the vertical plate of the right connecting frame (18); The top surface of the horizontal connecting frame (17) is pressed against the main moving block (40), and a downwardly extending protruding sliding portion (41) is formed in the middle of the bottom surface of the main moving block (40). The protruding sliding portion (41) is inserted into the central through groove (171) and moves left and right along the central through groove (171). A vertical clamping rod (42) is fixed on the top surface of the main moving block (40), and a bending portion (43) extending leftward is formed on the top of the vertical clamping rod (42). The left end of the bending portion (43) is formed with an arc-shaped clamping groove, which corresponds to the annular groove or the arc-shaped groove. The end of the push rod of the horizontal pushing cylinder (19) faces the right side wall of the vertical clamping rod (42); The clamping mechanism (30) comprises a right auxiliary baffle (31) fixed to the right side of the front wall surface of the rotating plate (25); a positioning block (32) is fixed to the left side of the lower part of the front wall surface of the rotating plate (25); a waist-shaped groove (33) is formed on the front wall surface of the positioning block (32); one of the U-shaped connectors extending from the rear end of the heat exchanger core (100) to be processed is inserted into the corresponding waist-shaped groove (33); A bending rod (251) is hingedly connected to the left side of the front portion of the rotating plate (25), a left auxiliary plate (252) is fixed to the right side of the front end of the bending rod (251), and an upper bending portion (253) extending to the right is formed on the top surface of the left auxiliary plate (252); The front end of a compression spring (254) is fixed on the rear wall surface of the rear bending rod portion of the bending rod (251), and the rear end of the compression spring (254) is fixed on the front wall surface of the rotating plate (25); A handle (255) is fixed on the left side wall of the middle portion of the bending rod (251); The front wall surface of the rotating plate (25) is formed with a plurality of elongated through slots. The right auxiliary baffle plate (31) is fixedly connected to the rotating plate (25) by means of bolts, and the screw rods of the bolts are inserted into the elongated through slots.

2. The automatic tube bending machine for heat exchanger core outlet tube according to claim 1, characterized in that: The right side of the main moving block (40) is hinged with a first rotating arm (44) through a hinge shaft, a right connecting block (172) is fixed to the top surface of the right end of the horizontal connecting frame (17), and a second rotating arm (45) is movably connected to the right connecting block (172) through a hinge shaft, and a bottom pushing cylinder (46) is hinged to the bottom of the horizontal connecting frame (17) through a hinge shaft, and the top end of the push rod of the bottom pushing cylinder (46) is movably connected to a lifting seat (47) through a hinge shaft, and the lifting seat (47) is inserted into the central through groove (171), and one end of the first rotating arm (44) and one end of the second rotating arm (45) are connected to the hinge shaft and movably connected to the upper part of the lifting seat (47).

3. The automatic tube bending machine for heat exchanger core outlet tube according to claim 1, characterized in that: A connecting support frame (111) is fixed to the right top surface of the front top plate (11), an auxiliary pushing cylinder (112) is fixed to the upper part of the connecting support frame (111), an end plate (113) is fixed to the left end surface of the auxiliary pushing cylinder (112), an end of a push rod of the auxiliary pushing cylinder (112) extends out of the end plate (113) and is fixed to a pushing plate (114), an auxiliary rod (115) extending to the left is formed on the left end surface of the pushing plate (114), and an end arc groove corresponding to the annular groove or the arc groove is formed on the left end of the auxiliary rod (115).

4. The automatic tube bending machine for heat exchanger core outlet tube according to claim 3, characterized in that: A guide rod (116) is fixed on the right side wall of the push plate (114), and the guide rod (116) is inserted into a guide through hole formed on the end plate (113).

5. The automatic tube bending machine for heat exchanger core outlet tube according to claim 1, characterized in that: The lateral movement mechanism (20) comprises a lateral adjustment screw (26) fixed to the middle of the top surface of the top plate of the frame (10), a connecting seat is fixed to the left and right parts of the top plate, the lateral adjustment screw (26) is movably connected to the two connecting seats through a bearing, the right end of the lateral adjustment screw (26) extends out of the right connecting seat, a motor seat (27) is fixed to the right end of the top surface of the top plate of the frame (10), a mobile servo motor (28) is fixed to the motor seat (27), and the output shaft of the mobile servo motor (28) is connected to the right end of the lateral adjustment screw (26) through a coupling.

6. The automatic tube bending machine for heat exchanger core outlet tube according to claim 5, characterized in that: The left and right parts of the top surface of the top plate of the frame (10) are fixed with transverse guide rails (1), the left and right parts of the bottom surface of the horizontal movable plate (22) are fixed with guide sliders (2), and the transverse guide rails (1) are inserted into the corresponding slide grooves formed on the bottom surface of the guide sliders (2).

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