CN115596960B - Intelligent equipment comprehensive installation support for construction engineering construction site - Google Patents

Abstract

The invention relates to the technical field of construction engineering construction sites, in particular to an intelligent equipment comprehensive mounting bracket for construction engineering sites, which comprises a bracket body, wherein an internal control mechanism is arranged in the bracket body, the internal control mechanism comprises a wire assembly, a motor assembly, a middle rod piece, a control piece and a foot control piece, the bracket body comprises a square plate frame, side support rods and a middle control plate frame, four uniformly-annularly-arranged side support rods are fixed below the square plate frame, the middle control plate frame is arranged at the middle lower section of the side support rods, the middle control plate frame is fixedly connected with the four side support rods, the motor assembly is fixed on the square plate frame, the equipment mounting bracket is fixedly supported below the equipment, and when the equipment is in normal operation, the bottom of the bracket is in a tightening state, if accidents happen, the bottom of the bracket is triggered to be unfolded in an initial stage, the tilting speed of the bracket is further slowed down, or the bracket is directly corrected to recover the upright supporting state, and the intelligent supporting effect is realized.

Description

Intelligent equipment comprehensive installation support for construction engineering construction site

Technical Field

The invention relates to the technical field of construction site equipment, in particular to an intelligent equipment comprehensive installation support for construction engineering sites.

Background

The intelligent equipment for the construction engineering construction site, wherein one intelligent embodiment is comprehensive lifting of construction safety of the construction engineering site, a device common on the construction engineering site is an equipment installation support, the operation and maintenance equipment for the construction site is placed on the support, the operation of the operation and maintenance equipment for the construction site is guaranteed, the space occupation range is reduced as much as possible, the equipment installation support manages itself, when an inclination crisis is encountered, the equipment installation support corrects the autonomous position, the safety function of the intelligent equipment is further embodied, one factor of support dumping is small in support area of the support bottom, the waist of the support cannot be stabilized, the support can be improved, the support bottom support area is improved, the occupied space of the support is increased, but the occupied space of the support bottom support is too large, obvious problems exist, the space of the construction site is limited, the occupied space of the working equipment is reduced as much as possible, the operation efficiency and the construction safety of the construction site can be effectively guaranteed, so that if the equipment installation support has the function of autonomous bottom expansion, the support dumping initial, the support bottom expansion is realized, the support position is restored or the speed of the support dumping is delayed, enough reaction time is reserved for workers, the construction of the worker, the support is in a normal state, the support is in a vertical state, the occupied space of the support is reduced, the intelligent engineering site is provided for the comprehensive construction site.

Disclosure of Invention

The invention aims to provide an intelligent equipment comprehensive mounting bracket for a construction engineering site, which aims to solve the problems in the background technology.

In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a construction engineering is wisdom equipment comprehensive installation support for building engineering building site, includes the support body, be provided with interior accuse mechanism in the support body, interior accuse mechanism includes wire subassembly, motor assembly, well member, control and sufficient controlling means, the support body includes top square grillage, side stay and well controlling grillage, the below of top square grillage is fixed with four evenly-annularly-established side stay, well controlling grillage setting in the well hypomere position of side stay, and well controlling grillage and four side stay fixed connection, motor assembly fixes on top square grillage, and motor assembly's below is connected with well member, and well member's well hypomere position is provided with the control, is connected with wire subassembly between control and the motor assembly, well member's bottom position is encircleed and is equipped with four evenly distributed's sufficient controlling means, sufficient controlling means is fixed on the side stay, four side stay cooperation spacing supporting control.

Preferably, the middle rod piece includes middle rod, rubber dish and gravity ball, the middle part of rubber dish runs through the middle rod, and the bottom mounting of middle rod has the gravity ball, and the control setting is in the rubber dish top, and the ring is equipped with four evenly distributed's sufficient controls around the rubber dish.

Preferably, the control piece includes extension spring, outer accuse body, interior bracing ring, gyro wheel and metal ring, four horizontal poles that outer accuse body includes that ring body and the outside solid fixed ring of ring body establish, and the horizontal pole tip on the outer accuse body is fixed on the side stay, and the ring body middle part of the outer accuse body is provided with interior bracing ring, and the middle part of interior bracing ring is provided with the metal ring, and the gyro wheel is fixed on interior bracing ring, and the wheel body part on the gyro wheel protrusion is to the ring channel of seting up on the metal ring lateral wall in, is connected with the extension spring that a plurality of even rings established between interior bracing ring and the outer accuse body, is provided with wire subassembly on the control piece.

Preferably, the wire assembly includes first wire, second wire, elastic metal piece and metal conductive torch, on the inner support ring is fixed to elastic metal piece one end, the other end and the metal ring contact of elastic metal piece, and the one end and the elastic metal piece of second wire are connected, and on the other end of second wire was connected to motor assembly, the middle part of metal ring was run through there is the well pole, and the metal conductive torch setting is in the metal ring middle part, and the metal conductive torch activity cup joints on the ring section of thick bamboo groove of seting up on the well pole, and the one end and the metal conductive barrel of first wire are connected, and the other end of first wire is connected to on the motor assembly.

Preferably, the motor assembly comprises a motor, a motor frame, a motor shaft and a universal joint, wherein the motor frame is fixed on the top square plate frame, a motor is fixed in the motor frame, the motor is connected with the motor shaft, the universal joint is connected between the motor shaft and the middle rod, and one end of each of the first lead wire and the second lead wire is connected with the motor.

Preferably, the foot control comprises a driving frame, a transverse control frame, a limit sleeve, a worm and a foot control frame, wherein the worm is movably sleeved in the middle of the limit sleeve, the top transmission of the worm is connected with the transverse control frame, the upper transmission of the transverse control frame is connected with the driving frame, the bottom transmission of the worm is connected with the foot control frame, and the foot control frame is fixed at the bottom of the side stay bar.

Preferably, the horizontal accuse frame includes long concave folded plate, guide bar, extension spring and movable rack, one side of long concave folded plate is provided with movable rack, is connected with the extension spring between one end of movable rack and the long concave folded plate one end, and the other end of long concave folded plate is fixed with the guide bar, and the prism hole of seting up on the movable rack is run through to the guide bar activity, and the worm top is realized being connected with the transmission of movable rack through setting up the gear, and the one end of movable rack sets up the short board perpendicularly.

Preferably, the drive frame includes spacing, brake disc and first pivot, the spacing includes the riser that J template and J template one side are connected perpendicularly, spacing one end is fixed on the side stay, the through-hole is seted up to the other end of spacing, and the activity has cup jointed first pivot in the through-hole, the bottom of first pivot is realized the transmission connection to movable rack through setting up the gear, the top of first pivot is fixed with four brake discs and evenly encircles and establish around the rubber disc, all set up a row of tooth on two opposite side walls on the movable rack, and be less than with worm driven a row of tooth length with first pivot driven a row of tooth length.

Preferably, the foot control frame comprises a C-shaped elastic sheet, an auxiliary rod, a control seat, a limiting foot body, a short control shaft and an anti-blocking plate, wherein the limiting foot body and the anti-blocking plate are both fixed at the bottom of the side supporting rod, a through hole is formed in one plate body of the limiting foot body, a rod body of a worm is movably penetrated through the through hole, a spiral tooth part on the worm is in transmission connection with the control seat, the control seat comprises a cylinder and a prism integrally connected with one side of the cylinder, a plurality of convex teeth are arranged on the other side wall of the cylinder of the control seat, the short control shaft is movably sleeved in the middle of the cylinder of the control seat, one end of the short control shaft is fixed on the limiting foot body, a long plate hole is formed in the prism of the control seat, the auxiliary rod is arranged in the long plate hole, one end of the auxiliary rod is hinged with the control seat, one side of the auxiliary rod is fixed with the C-shaped elastic sheet, one end of the C-shaped elastic sheet is fixed on the control seat, and the anti-blocking plate is arranged below the cylinder of the control seat.

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

1. the equipment mounting bracket is fixedly supported below the equipment, and in normal operation, the bottom of the bracket is in a tightened state, if accidents occur, the bracket is toppled over, the bottom of the bracket is triggered to be unfolded in an initial stage, so that the toppling speed of the bracket is slowed down, or the bracket is directly corrected to restore the upright supporting state, and the effect of intelligent supporting is realized.

2. The normal supporting equipment of support makes, and direct bottom tightens up can reduce the bottom surface space that occupies to reduce workman's stumbling problem probability, and the support bottom is expanded and can be reduced the unexpected loss of empting and bring, and the support is emptyd initially, automatic triggering the wisdom adjustment mechanism of support.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention.

Fig. 2 is a schematic view of the structure of the middle pole.

Fig. 3 is a schematic diagram of a wire assembly structure.

Fig. 4 is a schematic diagram of a motor assembly.

Fig. 5 is a schematic view of a side stay structure.

Fig. 6 is a schematic diagram of a foot control structure.

Fig. 7 is a schematic view of a transverse control frame structure.

Fig. 8 is a schematic view of a driving frame structure.

Fig. 9 is a schematic view of a foot control stand.

Fig. 10 is a schematic view of a brake disc structure.

In the figure: the device comprises a frame body 1, a wire assembly 2, a motor assembly 3, a middle rod piece 4, a control piece 5, a foot control piece 6, a top square plate frame 7, a side supporting rod 8, a middle control plate frame 9, an inner control mechanism 10, a middle rod 11, a rubber disc 12, a gravity ball 13, a first wire 14, a second wire 15, an elastic metal sheet 16, a metal conductive torch 17, a tension spring 18, an outer control body 19, an inner supporting ring 20, a roller 21, a metal ring 22, a motor 23, a motor frame 24, a motor shaft 25, a universal joint 26, a driving frame 27, a transverse control frame 28, a limiting sleeve 29, a worm 30, a foot control frame 31, a long concave folded plate 32, a guide rod 33, a tension spring 34, a movable rack 35, a limiting frame 36, a brake disc 37, a first supporting shaft 38, a C-shaped elastic sheet 39, a secondary rod 40, a control seat 41, a limiting foot body 42, a short control shaft 43 and a resistance plate 44.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. Based on the technical solutions of the present invention, all other embodiments obtained by a person skilled in the art without making any creative effort fall within the protection scope of the present invention.

Referring to fig. 1 to 10, the present invention provides a technical solution: the utility model provides a construction engineering is wisdom equipment comprehensive installation support for building engineering site, including support body 1, be provided with interior accuse mechanism 10 in the support body 1, interior accuse mechanism 10 includes wire subassembly 2, motor assembly 3, well pole piece 4, control 5 and sufficient controlling piece 6, support body 1 includes top square grillage 7, side stay 8 and well controlling grillage 9, the below of top square grillage 7 is fixed with four evenly-annularly side stay 8, well controlling grillage 9 sets up in the well hypomere position of side stay 8, and well controlling grillage 9 and four side stay 8 fixed connection, motor assembly 3 is fixed on top square grillage 7, the below of motor assembly 3 is connected with well pole piece 4, the well hypomere position of well pole piece 4 is provided with control 5, be connected with wire subassembly 2 between control 5 and the motor assembly 3, the bottom position ring of well pole piece 4 is equipped with four evenly distributed's sufficient controlling piece 6, sufficient controlling piece 6 is fixed on side stay 8, four side stay 8 cooperation spacing supporting control 5.

The middle rod piece 4 comprises a middle rod 11, a rubber disc 12 and a gravity ball 13, the middle part of the rubber disc 12 is penetrated with the middle rod 11, the bottom end of the middle rod 11 is fixed with the gravity ball 13, the control piece 5 is arranged above the rubber disc 12, and four evenly distributed foot control pieces 6 are annularly arranged around the rubber disc 12.

The control piece 5 comprises a tension spring 18, an outer control body 19, an inner supporting ring 20, a roller 21 and a metal ring 22, wherein the outer control body 19 comprises a ring body and four transverse rods fixedly arranged on the outer fixing ring of the ring body, the end parts of the transverse rods on the outer control body 19 are fixed on the side supporting rods 8, the inner supporting ring 20 is arranged in the middle of the ring body of the outer control body 19, the metal ring 22 is arranged in the middle of the inner supporting ring 20, the roller 21 is fixed on the inner supporting ring 20, the wheel body part on the roller 21 protrudes into an annular groove formed in the outer side wall of the metal ring 22, a plurality of tension springs 18 which are uniformly arranged in a ring shape are connected between the inner supporting ring 20 and the outer control body 19, and the wire assembly 2 is arranged on the control piece 5.

The wire assembly 2 comprises a first wire 14, a second wire 15, an elastic metal sheet 16 and a metal conductive torch 17, one end of the elastic metal sheet 16 is fixed on an inner supporting ring 20, the other end of the elastic metal sheet 16 is in contact with a metal ring 22, one end of the second wire 15 is connected with the elastic metal sheet 16, the other end of the second wire 15 is connected to the motor assembly 3, a middle rod 11 penetrates through the middle part of the metal ring 22, the metal conductive torch 17 is arranged in the middle part of the metal ring 22, the metal conductive torch 17 is movably sleeved on a ring barrel groove formed in the middle rod 11, one end of the first wire 14 is connected with the metal conductive torch 17, and the other end of the first wire 14 is connected to the motor assembly 3.

The motor assembly 3 comprises a motor 23, a motor frame 24, a motor shaft 25 and a universal joint 26, the motor frame 24 is fixed on the top square plate frame 7, the motor 23 is fixed in the motor frame 24, the motor shaft 25 is connected to the motor 23, the universal joint 26 is connected between the motor shaft 25 and the middle rod 11, one end of each of the first conducting wire 14 and the second conducting wire 15 is connected with the motor 23, referring to fig. 2, 3 and 4, the motor 23 is a prior art device, the conducting wire assembly 2 is a working switch of the motor 23, the motor 23 is externally connected to a power supply through a conducting wire, the power supply supplies power to the motor 23 in a state that the conducting wire assembly 2 is unblocked, the motor 23 works to drive the motor shaft 25, a circuit path on the conducting wire assembly 2 is that current flows through the first conducting wire 14 to the metal conducting torch 17, the metal conducting torch 17 is contacted with the metal ring 22, and the current flows to the elastic metal sheet 16 through the metal ring 22 and then flows to the motor 23 through the second conducting wire 15.

The foot control 6 comprises a driving frame 27, a transverse control frame 28, a limit sleeve 29, a worm 30 and a foot control frame 31, wherein the worm 30 is movably sleeved in the middle of the limit sleeve 29, the top end of the worm 30 is in transmission connection with the transverse control frame 28, the driving frame 27 is in transmission connection with the upper side of the transverse control frame 28, the bottom end of the worm 30 is in transmission connection with the foot control frame 31, and the foot control frame 31 is fixed at the bottom of the side stay bar 8.

The transverse control frame 28 comprises a long concave folded plate 32, a guide rod 33, a tension spring 34 and a movable rack 35, wherein the movable rack 35 is arranged on one side of the long concave folded plate 32, the tension spring 34 is connected between one end of the movable rack 35 and one end of the long concave folded plate 32, the guide rod 33 is fixed on the other end of the long concave folded plate 32, the guide rod 33 movably penetrates through a prism hole formed in the movable rack 35, the top of the worm 30 is in transmission connection with the movable rack 35 through a gear, and a short plate is vertically arranged at one end of the movable rack 35.

The driving frame 27 comprises a limiting frame 36, a brake disc 37 and a first support shaft 38, wherein the limiting frame 36 comprises a J-shaped plate and a vertical plate vertically connected with one side of the J-shaped plate, one end of the limiting frame 36 is fixed on the side supporting rod 8, the other end of the limiting frame 36 is provided with a through hole, the through hole is movably sleeved with the first support shaft 38, the bottom end of the first support shaft 38 is in transmission connection with the movable rack 35 through a gear, four brake discs 37 of the brake disc 37 are fixed at the top end of the first support shaft 38 and evenly arranged around the rubber disc 12 in a surrounding mode, and a row of teeth are arranged on two opposite side walls on the movable rack 35 and are smaller than a row of teeth transmitted with the worm 30 in length.

The foot control frame 31 comprises a C-shaped elastic piece 39, an auxiliary rod 40, a control seat 41, a limiting foot body 42, a short control shaft 43 and an anti-blocking plate 44, wherein the limiting foot body 42 and the anti-blocking plate 44 are both fixed at the bottom of the side supporting rod 8, a through hole is formed in one plate body of the limiting foot body 42, a rod body of the worm 30 movably penetrates through the through hole, a spiral tooth part on the worm 30 is in transmission connection with the control seat 41, the control seat 41 comprises a cylinder and a prism integrally connected with one side of the cylinder, a plurality of convex teeth are arranged on the other side wall of the cylinder of the control seat 41, the short control shaft 43 is movably sleeved in the middle of the cylinder of the control seat 41, one end of the short control shaft 43 is fixed on the limiting foot body 42, a long plate hole is formed in the prism of the control seat 41, the auxiliary rod 40 is arranged in the long plate hole, one end of the auxiliary rod 40 is hinged with the control seat 41, one side of the auxiliary rod 40 is fixedly provided with the C-shaped elastic piece 39, one end of the C-shaped elastic piece 39 is fixed on the control seat 41, and the anti-blocking plate 44 is arranged below the cylinder of the control seat 41.

When the bracket is toppled, the bracket body 1 is in an inclined state, the gravity ball 13 holds the middle rod 11, the middle rod 11 is kept in an upright state, the middle rod 11 controls the rubber disc 12, the rubber disc 12 can be contacted with part of the brake disc 37, in addition, the metal flashlight 17 can be preferentially contacted with the control piece 5 with offset position, namely, the metal flashlight 17 is contacted with one side of the metal ring 22, the power supply circuit of the motor 23 is smooth, the motor 23 is controlled to continuously rotate by working, the motor shaft 25 drives the middle rod 11, the middle rod 11 rotates to drive the rubber disc 12, the rubber disc 12 drives the brake disc 37 contacted with the middle rod, the brake disc 37 drives the first support shaft 38, the first support shaft 38 rotates to control the movable rack 35 to axially move, the movable rack 35 drives the worm 30, the worm 30 drives the control seat 41, and the maximum rotation circle number of the worm 30 is a fixed value, after the first support shaft 38 rotates for a certain circle number, the movable rack 35 and the first support shaft 38 are separated from the meshed transmission state, namely, the brake disc 37 continues to rotate, and the transmission is still not reached, the position of the worm 30, the aim is to control the maximum rotation angle of the control seat 41 is ninety degrees, the bottom of the bracket body 1 is controlled, the inclined direction bottom, the two control seats control the two support frames 1 are outwards distributed and the two support frames are unfolded, and the bottom of the bracket body 1 is stably and the bottom is formed.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (2)

1. The utility model provides a construction engineering is wisdom equipment comprehensive installation support for building engineering building site, includes support body (1), its characterized in that: an internal control mechanism (10) is arranged in the frame body (1), the internal control mechanism (10) comprises a wire assembly (2), a motor assembly (3), a middle rod piece (4), a control piece (5) and a foot control piece (6), the frame body (1) comprises a top square plate frame (7), side support rods (8) and a middle control plate frame (9), four uniformly annular side support rods (8) are fixed below the top Fang Banjia (7), the middle control plate frame (9) is arranged at the middle lower section position of the side support rods (8), the middle control plate frame (9) is fixedly connected with the four side support rods (8), the motor assembly (3) is fixed on the top square plate frame (7), the middle rod piece (4) is connected with the lower middle rod piece (4), the control piece (5) is arranged at the middle upper section position of the middle rod piece (4), the wire assembly (2) is connected between the control piece (5) and the motor assembly (3), four uniform foot control pieces (6) are annularly arranged at the bottom position of the middle rod piece (4), the four uniform foot control pieces (6) are matched with the four side support rods (8) and the four ball control pieces (12) are matched with the four ball control pieces (12), the middle part of the rubber disc (12) is penetrated with a middle rod (11), the bottom end of the middle rod (11) is fixed with a gravity ball (13), a control piece (5) is arranged above the rubber disc (12), four evenly distributed foot control pieces (6) are annularly arranged around the rubber disc (12), the control piece (5) comprises tension springs (18), an outer control body (19), an inner support ring (20), rollers (21) and metal rings (22), the outer control body (19) comprises four cross rods which are fixedly arranged on the outer side support rod (8), the end part of a transverse rod on the outer control body (19) is fixed on the side support rod (8), the middle part of the ring body of the outer control body (19) is provided with an inner support ring (20), the middle part of the inner support ring (20) is provided with a metal ring (22), the roller (21) is fixed on the inner support ring (20), the wheel body part on the roller (21) protrudes into an annular groove formed in the outer side wall of the metal ring (22), a plurality of evenly arranged tension springs (18) are connected between the inner support ring (20) and the outer control body (19), the inner support ring (20) is provided with a plurality of evenly arranged tension springs (18), the first conductive wire assembly (16) and the second conductive wire assembly (16) are arranged on the first conductive wire assembly (16) and the second conductive wire assembly (16), the other end of the elastic metal sheet (16) is contacted with the metal ring (22), one end of the second wire (15) is connected with the elastic metal sheet (16), the other end of the second wire (15) is connected to the motor assembly (3), the middle part of the metal ring (22) is penetrated with the middle rod (11), the metal conductive torch (17) is arranged at the middle part of the metal ring (22), the metal conductive torch (17) is movably sleeved on a ring barrel groove formed in the middle rod (11), one end of the first wire (14) is connected with the metal conductive torch (17), the other end of the first wire (14) is connected to the motor assembly (3), the motor assembly (3) comprises a motor (23), a motor frame (24), a motor shaft (25) and a universal joint (26), the motor frame (24) is fixed on the top plate frame (7), the motor frame (24) is internally provided with the motor (23), the motor shaft (25) is connected with the motor shaft (23), the universal joint (26) is connected between the motor shaft (25) and the middle rod (11), the first wire (14) and the second wire (15) are connected with the motor (25), the foot control sleeve (31), the foot control sleeve (30) and the foot control sleeve (28) are connected with the foot control frame (31), the middle part of the limit sleeve (29) is movably sleeved with a worm (30), the top end of the worm (30) is in transmission connection with a transverse control frame (28), the upper part of the transverse control frame (28) is in transmission connection with a driving frame (27), the bottom end of the worm (30) is in transmission connection with a foot control frame (31), the foot control frame (31) is fixed at the bottom of a side supporting rod (8), the transverse control frame (28) comprises a long concave folded plate (32), a guide rod (33), a tension spring (34) and a movable rack (35), one side of the long concave folded plate (32) is provided with the movable rack (35), a tension spring (34) is connected between one end of the movable rack (35) and one end of the long concave folded plate (32), the other end of the long concave folded plate (32) is fixedly provided with a guide rod (33), the guide rod (33) movably penetrates through a prismatic hole formed in the movable rack (35), the top of the worm (30) is in transmission connection with the movable rack (35) through a gear, one end of the movable rack (35) is vertically provided with a short plate, the driving frame (27) comprises a limit frame (36), a brake disc (37) and a first support shaft (36) is connected with one side of the limit plate (36) and one side of the limit plate (8) is vertically provided with a limit plate (J-shaped through hole, and a first support shaft (38) is movably sleeved in the through hole, the bottom end of the first support shaft (38) is connected with the movable rack (35) in a transmission way through a gear, four brake discs (37) of the brake disc (37) are fixed at the top end of the first support shaft (38) and uniformly annularly arranged around the rubber disc (12), a row of teeth are arranged on two opposite side walls on the movable rack (35), and the length of the row of teeth driven by the first support shaft (38) is smaller than that of the row of teeth driven by the worm (30).

2. The intelligent equipment comprehensive installation support for construction engineering sites according to claim 1, wherein: the foot control frame (31) comprises a C-shaped elastic piece (39), an auxiliary rod (40), a control seat (41), a limiting foot body (42), a short control shaft (43) and a resistance plate (44), wherein the limiting foot body (42) and the resistance plate (44) are fixed at the bottom of a side supporting rod (8), a through hole is formed in one plate body of the limiting foot body (42), a rod body of a worm (30) is movably penetrated through the through hole, a spiral tooth part on the worm (30) is in transmission connection with the control seat (41), the control seat (41) comprises a cylinder and a prism integrally connected with one side of the cylinder, a plurality of convex teeth are arranged on the other side wall of the cylinder of the control seat (41), the short control shaft (43) is movably sleeved at the middle part of the cylinder of the control seat (41), one end of the short control shaft (43) is fixed on the limiting foot body (42), a long plate hole is formed in the prism of the control seat (41), the auxiliary rod (40) is arranged in the long plate hole, one end of the auxiliary rod (40) is hinged with the control seat (41), one side of the auxiliary rod (40) is fixedly provided with the C-shaped elastic piece (39), and one end of the auxiliary rod (40) is fixedly arranged on the control seat (41) below the control seat (41).

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