CN112223033B

CN112223033B - Car rearview mirror mould grinding device

Info

Publication number: CN112223033B
Application number: CN202011122639.9A
Authority: CN
Inventors: 蔡辉远
Original assignee: Wuhu Xingzhen Mould Co ltd
Current assignee: Wuhu Xingzhen Mould Co ltd
Priority date: 2020-10-20
Filing date: 2020-10-20
Publication date: 2022-07-15
Anticipated expiration: 2040-10-20
Also published as: CN112223033A

Abstract

The invention discloses a polishing device for a car backing mirror mold, which belongs to the technical field of mold polishing and comprises a base, polishing equipment, placing equipment and dust removing equipment, wherein the polishing equipment, the placing equipment and the dust removing equipment are arranged on the base, the middle part of the base is hollow, a power element for storing the placing equipment and the dust removing equipment is arranged in the bottom, the polishing equipment is arranged on the right side of the top of the base and is used for polishing the backing mirror mold, the placing equipment is arranged at the central position of the top of the base and is used for fixing the backing mirror mold, the dust removing equipment is arranged on the left side of the top of the base and is used for absorbing dust generated by polishing when the polishing equipment polishes the backing mirror mold and preventing the dust from accumulating in the backing mirror mold and influencing the molding of a backing mirror.

Description

Car rearview mirror mould grinding device

Technical Field

The invention relates to the technical field of mold polishing, in particular to a polishing device for a mold of an automobile rearview mirror

Background

The rearview plays a vital role for drivers, the demand of the rearview as an important automobile accessory is rapidly increased along with the rapid development of the automobile industry, and simultaneously, higher requirements are provided for the performance of the rearview so as to reduce a visual field blind area, make early warning and reduce the occurrence of traffic accidents. Because the backing mirror shape is different, not only reduced the technology degree of difficulty through mould machine-shaping, and with low costs, the qualification rate is high, the equipment after the drawing of patterns sprays paint can, but if the backing mirror through mould processing is not smooth on the mould surface, can lead to the backing mirror surface unsmooth after the processing, so still need once polish it, just can guarantee the smoothness of backing mirror and improve the security, but if directly polish the backing mirror, the size of the backing mirror that probably polished the completion can produce certain change, lead to not up to standard.

Disclosure of Invention

The invention provides a grinding device for a backing mirror mold, which aims to solve the technical problems that in the prior art, if the surface of the mold is not smooth, the surface of the machined backing mirror is not smooth, the surface of the backing mirror needs to be ground for one time, the smoothness of the backing mirror can be ensured, the safety is improved, and if the backing mirror is directly ground, the size of the backing mirror which is possibly ground can be changed to a certain extent, so that the backing mirror cannot reach the standard.

A grinding device for a rearview mirror of an automobile comprises a base, grinding equipment, placing equipment and dust removing equipment, wherein the grinding equipment, the placing equipment and the dust removing equipment are arranged on the base, the middle of the base is hollowed, the grinding equipment is arranged on the right side of the top of the base, the placing equipment is arranged at the central position of the top of the base, the dust removing equipment is arranged on the left side of the top of the base, the grinding equipment comprises a bottom plate, a first motor, a second motor, a third motor, a fourth motor, a first movable table, a second movable table, a third movable table and a grinding head, the bottom plate is fixedly connected to the right side of the top of the base, the first motor is arranged on the right side of the top of the bottom plate, a slide rail is further arranged at the top of the bottom plate, the first movable table is arranged at the top of the bottom plate and is slidably connected with the bottom plate through the slide rail, a lead screw is further arranged on a main shaft of the first motor, the screw rod penetrates through the first mobile station, when the first motor works, the screw rod can drive the first mobile station to move left and right, the second mobile station is arranged on the left side of the top of the first mobile station, the left side of the top of the first mobile station is also provided with a slide rail, the second mobile station is connected with the first mobile station in a sliding way through the slide rail, the second motor is arranged on the left side of the top of the first mobile station, the main shaft of the second motor is also provided with the screw rod, the screw rod penetrates through the second mobile station, when the second motor works, the screw rod can drive the second mobile station to move back and forth on the first mobile station, the third mobile station is arranged on the front side of the second mobile station, the front side of the second mobile station is also provided with the slide rail, and the third mobile station is connected with the second mobile station in a sliding way through the slide rail, the third motor sets up the right side of second mobile station, just the main shaft of third motor runs through the second mobile station, still be equipped with the moving gear on the main shaft of third motor, the right side of third mobile station is equipped with the rack, the rack with the moving gear meshing, work as when the third motor is worked, the accessible the meshing effect of moving gear and rack drives the third mobile station reciprocates on the second mobile station, the fourth motor sets up the left side of third mobile station, the head of polishing sets up on the main shaft of fourth motor.

Further, the placing equipment comprises a placing plate, a placing motor and clamping columns, the placing plate is arranged at the top of the base, the placing motor is arranged inside the base, a main shaft of the placing motor penetrates through the base and is fixedly connected with the placing plate, the clamping columns are four in number, and the clamping columns are arranged at the top of the placing plate.

Furthermore, the four clamping columns are made of rubber.

Furthermore, the dust removing equipment comprises a half-toothed ring, a dust suction fan, a dust suction hopper, a torsion gear, a torsion piece, a torsion rod, a first torsion block, a second torsion block and a torsion motor, wherein the torsion gear is arranged at the top of the base, a connecting shaft is arranged at the bottom of the torsion gear, the connecting shaft and the torsion gear are coaxially arranged and penetrate through the base, the torsion piece is arranged at the bottom of the connecting shaft and fixedly connected with the connecting shaft, the torsion piece is arranged in the base and comprises a top plate, a chassis and four matching rods, the top plate is fixedly connected with the connecting shaft, the chassis is slidably connected with the bottom of the base, the four matching rods are arranged between the top plate and the chassis, the torsion rods are arranged between the four matching rods, the torsion rods are obliquely arranged, the first torsion block is arranged at the left end of the torsion rod, the second twists reverse the piece setting and is in the right-hand member of torsion bar, it is in to twist reverse the motor setting the other end of first piece of twisting, just the main shaft of twisting the motor with first quick fixed connection that twists reverse, the second twist the piece the other end with the right side wall sliding connection of base, half ring gear sets up the gear right side that twists reverse, half ring gear with twist reverse gear engagement and with base sliding connection, the dust absorption fill is equipped with two, two the dust absorption fill sets up the both ends of half ring gear, just dust absorption fan sets up base top left side, every all be equipped with dust absorption hose on the dust absorption fill, dust absorption hose's the other end and dust absorption fan fixed connection.

Furthermore, the first torsion block and the second torsion block are arranged in a V shape, and one end of the first torsion block connected with the torsion motor and one end of the second torsion block connected with the right side wall of the base are positioned on the same horizontal plane.

Furthermore, a sliding block is arranged at the bottom of the torsion motor, the sliding block is fixedly connected with the torsion motor through a bolt, a sliding table is arranged at the bottom of the sliding block, a sliding groove is formed in the sliding table, the sliding block is connected with the sliding groove in a sliding manner, a first sliding part is arranged on the first torsion block, the first sliding part is connected with the first torsion block in a sliding manner, and the first sliding part is hinged with the torsion rod; and a second sliding part is arranged on the second torsion block, the second sliding part is connected with the second torsion block in a sliding manner, and the second sliding part is hinged with the torsion rod.

Furthermore, two adjusting nuts are arranged on the front side of the sliding block.

Compared with the prior art, the invention has the beneficial effects that:

firstly, when the backing mirror mold needs to be polished, the first motor works to drive the first mobile platform to move left and right on the base, the second motor works to drive the second mobile platform to move back and forth on the first mobile platform, the third motor works to drive the third mobile platform to move up and down on the second mobile platform, the position of the polishing head is adjusted, and finally the fourth motor works to drive the polishing head to rotate, so that the polishing of the backing mirror mold is realized.

Secondly, the dust removing device is arranged, when the torsion motor works, the torsion rod can be driven to rotate in a conical shape through the first torsion block, when the torsion rod rotates, the torsion rod is in contact with the four matching rods to drive the top plate and the base plate to rotate in a reciprocating mode, so that the torsion gear and the half-tooth ring meshed with the torsion gear are driven to rotate in a reciprocating mode, at the moment, the dust collecting fan works, the two dust collecting hoppers generate suction force, and dust is collected along the reciprocating rotation of the half-tooth ring.

Thirdly, if the rotating angles of the top plate and the chassis need to be adjusted, the torsion motor can be moved on the sliding table, the first sliding piece and the second sliding piece are respectively moved on the first torsion block and the second torsion block through pulling force, and the angle between the first torsion block and the second torsion block of the torsion rod is adjusted.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a schematic perspective view of the polishing apparatus of the present invention;

FIG. 4 is a schematic perspective view of the placement device of the present invention;

FIG. 5 is a schematic perspective view of the dust removing apparatus of the present invention;

FIG. 6 is a schematic structural view of a first working state of the dust removing device of the present invention;

fig. 7 is a schematic structural view of a second working state of the dust removing device of the present invention.

Reference numerals

The device comprises a base 1, a grinding device 2, a placing device 3, a dust removing device 4, a bottom plate 21, a first motor 22, a second motor 23, a third motor 24, a fourth motor 25, a first moving table 26, a second moving table 27, a third moving table 28, a grinding head 29, a placing disc 31, a placing motor 32, a clamping column 33, a half-toothed ring 41, a dust suction fan 42, a dust suction hopper 43, a torsion gear 44, a torsion piece 45, a torsion rod 46, a first torsion block 47, a second torsion block 48, a torsion motor 49, a top plate 410, a bottom plate 411, a matching rod 412, a sliding block 413, a sliding table 414, a sliding groove 415, a first sliding piece 416, a second sliding piece 417 and an adjusting nut 418.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.

The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

As described below with reference to fig. 1 to 7, an embodiment of the present invention provides a grinding device for a rearview mirror mold, including a base 1, a grinding device 2, a placing device 3, and a dust removing device 4 disposed on the base 1, the middle part of the base 1 is hollow, the inside of the bottom is used for storing the power elements of the placing equipment 3 and the dust removing equipment 4, the polishing device 2 is arranged on the right side of the top of the base 1, the polishing device 2 is used for polishing a rearview mirror mould, the placing device 3 is arranged at the center of the top of the base 1, the placing device 3 is used for fixing a rearview mirror die, the dust removing device 4 is arranged on the left side of the top of the base 1, and the dust removing device 4 is used for absorbing dust generated by polishing when the polishing device 2 polishes the rearview mirror mold, so that dust is prevented from being accumulated in the rearview mirror mold to influence the molding of the rearview mirror; the polishing equipment 2 comprises a bottom plate 21, a first motor 22, a second motor 23, a third motor 24, a fourth motor 25, a first moving table 26, a second moving table 27, a third moving table 28 and a polishing head 29, wherein the bottom plate 21 is fixedly connected to the right side of the top of the base 1, the first motor 22 is arranged on the right side of the top of the bottom plate 21, a slide rail is further arranged at the top of the bottom plate 21, the first moving table 26 is slidably connected with the bottom plate 21 through the slide rail, a lead screw is further arranged on a main shaft of the first motor 22 and penetrates through the first moving table 26, when the first motor 22 works, the first moving table 26 can be driven to move leftwards and rightwards, the second moving table 27 is arranged at the left side of the top of the first moving table 26, a slide rail is further arranged at the left side of the top of the first moving table 26, the second moving table 27 is slidably connected to the first moving table 26 through the sliding rail, the second motor 23 is disposed on the left side of the top of the first moving table 26, a lead screw is further disposed on a main shaft of the second motor 23, the lead screw penetrates through the second moving table 27, when the second motor 23 works, the second moving table 27 is driven by the lead screw to move back and forth on the first moving table 26, the third moving table 28 is disposed on the front side of the second moving table 27, a sliding rail is further disposed on the front side of the second moving table 27, the third moving table 28 is slidably connected to the second moving table 27 through the sliding rail, the third motor 24 is disposed on the right side of the second moving table 27, a main shaft of the third motor 24 penetrates through the second moving table 27, a moving gear is further disposed on the main shaft of the third motor 24, a rack is arranged on the right side of the third mobile platform 28, the rack is engaged with the mobile gear, when the third motor 24 works, the third mobile platform 28 can be driven to move up and down on the second mobile platform 27 through the engagement action of the mobile gear and the rack, the fourth motor 25 is arranged on the left side of the third mobile platform 28, the polishing head 29 is arranged on a spindle of the fourth motor 25, when the reverse mirror mold needs to be polished, the first mobile platform 26 is driven to move left and right on the base 1 through the work of the first motor 22, the second mobile platform 27 is driven to move back and forth on the first mobile platform 26 through the work of the second motor 23, the third mobile platform 28 is driven to move up and down on the second mobile platform 27 through the work of the third motor 24, the position adjustment of the polishing head 29 is realized, and finally the polishing head 29 is driven to rotate through the work of the fourth motor 25, and (6) polishing is realized.

Preferably, place equipment 3 including placing dish 31, placing motor 32 and pressing from both sides tight post 33, it sets up to place dish 31 1 top of base, it sets up to place motor 32 inside the base 1, just the main shaft of placing motor 32 runs through base 1 and with place dish 31 fixed connection, it is equipped with four, four to press from both sides tight post 33 and set up place the top of dish 31, four it is used for fixed rearview mirror mould to press from both sides tight post 33, works as place motor 32 during operation, can drive place dish 31 and fix the rearview mirror mould rotation on placing dish 31, in order to cooperate the 2 adjustment rearview mirror moulds of equipment of polishing.

Preferably, four of the clamping posts 33 are made of rubber, which is advantageous in that the friction between the clamping posts 33 and the rearview mirror mold can be increased.

Preferably, the dust removing device 4 includes a half-toothed ring 41, a dust suction fan 42, a dust suction hopper 43, a torsion gear 44, a torsion piece 45, a torsion rod 46, a first torsion block 47, a second torsion block 48 and a torsion motor 49, the torsion gear 44 is disposed at the top of the base 1, a connecting shaft is disposed at the bottom of the torsion gear 44, the connecting shaft and the torsion gear 44 are coaxially disposed and penetrate through the base 1, the torsion piece 45 is disposed at the bottom of the connecting shaft, the torsion piece 45 is fixedly connected with the connecting shaft, the torsion piece 45 is disposed inside the base 1, the torsion piece 45 includes a top plate 410, a bottom plate 411 and four matching rods 412, the top plate 410 is fixedly connected with the connecting shaft, the bottom plate 411 is slidably connected with the bottom of the base 1, the four matching rods 412 are disposed between the top plate 410 and the bottom plate 411, the torsion rod 46 is disposed between the four matching rods 412, the torsion bar 46 is obliquely arranged, the first torsion block 47 is arranged at the left end of the torsion bar 46, the second torsion block 48 is arranged at the right end of the torsion bar 46, the torsion motor 49 is arranged at the other end of the first torsion block 47, the main shaft of the torsion motor 49 is fixedly connected with the first torsion block, the other end of the second torsion block 48 is slidably connected with the right side wall of the base 1, the half toothed ring 41 is arranged at the right side of the torsion gear 44, the half toothed ring 41 is meshed with the torsion gear 44 and is slidably connected with the base 1, two dust suction hoppers 43 are arranged at two ends of the half toothed ring 41, the dust suction fan 42 is arranged at the left side of the top of the base 1, each dust suction hopper 43 is provided with a dust suction hose, and the other end of the dust suction hose is fixedly connected with the dust suction fan 42, when the torsion motor 49 works, the torsion rod 46 can be driven to rotate in a conical shape by the first torsion block 47, when the torsion rod 46 rotates, the four matching rods 412 are contacted to drive the top plate 410 and the base plate 411 to rotate in a reciprocating manner, so that the torsion gear 44 and the half-toothed ring 41 meshed with the torsion gear are driven to rotate in a reciprocating manner, and at the moment, the dust collection fan 42 works to enable the two dust collection hoppers 43 to generate suction and rotate in a reciprocating manner along with the half-toothed ring 41 to collect dust.

Preferably, the first torsion block 47 and the second torsion block 48 are formed in a V shape, and an end of the first torsion block 47 connected to the torsion motor 49 and an end of the second torsion block 48 connected to the right side wall of the base 1 are located at the same horizontal plane, which is advantageous in that it is possible to ensure that the torsion bar 46 is always in a tilted state and to realize a tapered rotation.

Preferably, a sliding block 413 is arranged at the bottom of the torsion motor 49, the sliding block 413 is fixedly connected with the torsion motor 49 through a bolt, a sliding table 414 is arranged at the bottom of the sliding block 413, a sliding groove 415 is arranged on the sliding table 414, the sliding block 413 is connected with the sliding groove 415 in a sliding manner, a first sliding member 416 is arranged on the first torsion block 47, the first sliding member 416 is connected with the first torsion block 47 in a sliding manner, and the first sliding member 416 is hinged to the torsion rod 46; the second torsion block 48 is provided with a second sliding member 417, the second sliding member 417 is slidably connected to the second torsion block 48, the second sliding member 417 is hinged to the torsion bar 46, the larger the inclination angle of the torsion bar 46 is, the larger the reciprocating rotation angle of the top plate 410 and the bottom plate 411 is, if the rotation angle of the top plate 410 and the top plate 410 needs to be adjusted, the torsion motor 49 can be moved on the sliding table 414, and the first sliding member 416 and the second sliding member 417 are moved on the first torsion block 47 and the second torsion block 48 respectively by pulling force, so as to adjust the angle of the torsion bar 46 between the first torsion block 47 and the second torsion block 48.

Preferably, two adjusting nuts 418 are provided at the front side of the sliding block 413, and the two adjusting nuts 418 can fix the position of the sliding block 413 to prevent the sliding block 413 from sliding in the sliding slot 415.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The grinding device for the automobile rearview mirror is characterized by comprising a base (1), grinding equipment (2), placing equipment (3) and dust removing equipment (4), wherein the grinding equipment (2), the placing equipment (3) and the dust removing equipment (4) are arranged on the base (1), the middle of the base (1) is hollow, the grinding equipment (2) is arranged on the right side of the top of the base (1), the placing equipment (3) is arranged at the central position of the top of the base (1), the dust removing equipment (4) is arranged on the left side of the top of the base (1), the grinding equipment (2) comprises a bottom plate (21), a first motor (22), a second motor (23), a third motor (24), a fourth motor (25), a first movable platform (26), a second movable platform (27), a third movable platform (28) and a grinding head (29), the bottom plate (21) is fixedly connected on the right side of the top of the base (1), the first motor (22) is arranged on the right side of the top of the bottom plate (21), a sliding rail is further arranged on the top of the bottom plate (21), the first mobile platform (26) is connected with the bottom plate (21) in a sliding mode through the sliding rail, a lead screw is further arranged on a main shaft of the first motor (22) and penetrates through the first mobile platform (26), when the first motor (22) works, the first mobile platform (26) can be driven to move left and right, the second mobile platform (27) is arranged on the left side of the top of the first mobile platform (26), the sliding rail is further arranged on the left side of the top of the first mobile platform (26), the second mobile platform (27) is connected with the first mobile platform (26) in a sliding mode through the sliding rail, and the second motor (23) is arranged on the left side of the top of the first mobile platform (26), a screw rod is further arranged on a main shaft of the second motor (23), the screw rod penetrates through the second moving table (27), when the second motor (23) works, the screw rod can drive the second moving table (27) to move back and forth on the first moving table (26), the third moving table (28) is arranged on the front side of the second moving table (27), a slide rail is further arranged on the front side of the second moving table (27), the third moving table (28) is connected with the second moving table (27) in a sliding mode through the slide rail, the third motor (24) is arranged on the right side of the second moving table (27), the main shaft of the third motor (24) penetrates through the second moving table (27), a moving gear is further arranged on the main shaft of the third motor (24), a rack is arranged on the right side of the third moving table (28), and the rack is meshed with the moving gear, when the third motor (24) works, the third moving table (28) can be driven to move up and down on the second moving table (27) through the meshing action of the moving gear and the rack, the fourth motor (25) is arranged on the left side of the third moving table (28), and the polishing head (29) is arranged on a spindle of the fourth motor (25); the placing device (3) comprises a placing disc (31), a placing motor (32) and clamping columns (33), the placing disc (31) is arranged at the top of the base (1), the placing motor (32) is arranged in the base (1), a main shaft of the placing motor (32) penetrates through the base (1) and is fixedly connected with the placing disc (31), four clamping columns (33) are arranged, and the four clamping columns (33) are arranged at the top of the placing disc (31); the four clamping columns (33) are made of rubber; the dust removing device (4) comprises a semi-toothed ring (41), a dust suction fan (42), a dust suction hopper (43), a torsion gear (44), a torsion piece (45), a torsion rod (46), a first torsion block (47), a second torsion block (48) and a torsion motor (49), wherein the torsion gear (44) is arranged at the top of the base (1), a connecting shaft is arranged at the bottom of the torsion gear (44), the connecting shaft and the torsion gear (44) are coaxially arranged and penetrate through the base (1), the torsion piece (45) is arranged at the bottom of the connecting shaft, the torsion piece (45) is fixedly connected with the connecting shaft, the torsion piece (45) is arranged inside the base (1), the torsion piece (45) comprises a top plate (410), a base plate (411) and four matching rods (412), the top plate (410) is fixedly connected with the connecting shaft, and the base plate (411) is slidably connected with the bottom of the base (1), four the cooperation pole (412) set up between roof (410) and chassis (411), torsion bar (46) set up four between cooperation pole (412), and torsion bar (46) slope sets up, first torsion piece (47) set up the left end of torsion bar (46), second torsion piece (48) set up the right-hand member of torsion bar (46), torsion motor (49) set up the other end of first torsion piece (47), and the main shaft of torsion motor (49) with first torsion piece fixed connection, the other end of second torsion piece (48) with the right side wall sliding connection of base (1), half ring gear (41) set up in torsion gear (44) right side, half ring gear (41) with torsion gear (44) meshing and with base (1) sliding connection, dust absorption fill (43) are equipped with two, the two dust suction hoppers (43) are arranged at two ends of the semi-toothed ring (41), the dust suction fan (42) is arranged on the left side of the top of the base (1), each dust suction hopper (43) is provided with a dust suction hose, and the other end of each dust suction hose is fixedly connected with the dust suction fan (42); the first torsion block (47) and the second torsion block (48) are arranged in a V shape, and one end of the first torsion block (47) connected with a torsion motor (49) and one end of the second torsion block (48) connected with the right side wall of the base (1) are positioned at the same horizontal plane; the bottom of the torsion motor (49) is provided with a sliding block (413), the sliding block (413) is fixedly connected with the torsion motor (49) through a bolt, the bottom of the sliding block (413) is provided with a sliding table (414), the sliding table (414) is provided with a sliding groove (415), the sliding block (413) is in sliding connection with the sliding groove (415), the first torsion block (47) is provided with a first sliding piece (416), the first sliding piece (416) is in sliding connection with the first torsion block (47), and the first sliding piece (416) is hinged to the torsion rod (46); a second sliding piece (417) is arranged on the second torsion block (48), the second sliding piece (417) is connected with the second torsion block (48) in a sliding manner, and the second sliding piece (417) is hinged with the torsion rod (46); two adjusting nuts (418) are arranged on the front side of the sliding block (413).