CN210231287U - Mouth bundling device for heat conducting copper pipe mouth in fan coil - Google Patents

Abstract

The utility model provides a mouth device is restrainted to orificial heat conduction copper pipe in fan coil includes: the clamp comprises a rack, a driving motor, a mouth binding mechanism, a clamp and a transmission mechanism, wherein the driving motor is fixed at the top of the rack, the mouth binding mechanism is fixed on an output shaft of the driving motor, a sliding groove is formed in the rack opposite to the mouth binding mechanism, the transmission mechanism is arranged at the position of the sliding groove, the transmission mechanism controls the clamp to move along the direction of the output shaft of the driving motor, a copper pipe is fixedly clamped on the clamp, and the copper pipe is aligned to the mouth binding mechanism. The utility model provides a fan coil pipe well heat conduction copper pipe orificial bundle mouth device can evenly effectually carry out bundle mouth processing to the mouth of pipe of copper pipe to avoid when pegging graft the copper pipe to aluminium fin because the copper pipe mouth of pipe is too sharp to cause the damage to aluminium fin, thereby avoid contact failure, influence the effect of heat transfer between copper pipe and the aluminium fin.

Description

Mouth bundling device for heat conducting copper pipe mouth in fan coil

Technical Field

The utility model relates to an air conditioner field especially relates to a mouth device is restrainted to heat conduction copper pipe mouth among fan coil.

Background

The fan coil unit is used to circulate indoor air continuously through the coil to be cooled or heated, so as to maintain the room at a desired temperature and a certain relative humidity. The heat exchange coil pipe is generally formed by connecting aluminum fins with copper pipes in series, the outer diameter of each copper pipe is 10-16 mm, the thickness of each fin is about 0.15-0.2 mm, the distance between the fins is 2.0-3.0 mm, medium water for cold and heat transfer flows inside each copper pipe, and heat exchange between the medium water and air is completed through the copper pipes and the fins.

At present, the mouth of pipe after the copper pipe cutting is accomplished is flat, form 90 cutting edges, and consider that the hardness of copper will be greater than aluminium, the round hole on the copper pipe disect insertion aluminium fin of cutting completion causes the damage of aluminium fin round hole easily, lead to the contact between aluminium fin and the copper pipe gap to appear, influence the heat transfer between copper pipe and the aluminium fin, consequently need process the tip of copper pipe, remove 90 cutting edges, can not cause the damage to the round hole when making the tip of copper pipe insert the round hole like this.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a mouth device is restrainted to heat conduction copper pipe mouth among fan coil.

A mouth-binding device of a heat-conducting copper pipe mouth in a fan coil comprises a frame, wherein,

a driving motor is fixed at the top of the rack and is electrically connected with a power supply through a control switch;

a fixed cylinder which is coaxially arranged is fixed on an output shaft of the driving motor, a correction seat is fixed in the fixed cylinder, one end of the correction seat facing to the cylinder opening is provided with an annular step-shaped recess with gradually enlarged caliber, one end of the correction seat back to the cylinder opening is the bottom surface of the correction seat, a gap is arranged on the correction seat, the gap extends from the recess to the side wall and the bottom surface of the correction seat along the plane where a center shaft of the correction seat is located, a driving disc is rotatably connected in the fixed cylinder opposite to the bottom surface, one side of the driving disc opposite to the bottom surface is provided with a thread groove, a blade is arranged in the gap in a sliding manner, a protrusion is arranged on the blade, and the protrusion is inserted in the thread groove in a sliding manner;

and a clamp is arranged on the rack opposite to the output shaft of the driving motor in a sliding manner.

Preferably, a bevel gear is rotatably connected to a side wall penetrating through the fixed cylinder, a bevel gear-like structure is arranged on one side of the driving disc, which is away from the bottom surface, and the bevel gear is in toothed connection with the bevel gear-like structure.

Preferably, a fastening bolt is screwed through the side wall of the fixed cylinder, and one end of the fastening bolt, which penetrates into the fixed cylinder, abuts against the side wall of the driving disc.

Preferably, a sliding groove is formed in the rack and right opposite to an output shaft of the driving motor, a sliding block is connected in the sliding groove in a sliding mode, a transmission screw rod is connected in the sliding groove in a rotating mode and penetrates through the sliding block in a threaded mode, one end of the transmission screw rod penetrates through the sliding groove, and a handle is fixed to one end of the transmission screw rod penetrating through the sliding groove.

Preferably, anchor clamps include first splint, link, telescopic link, second splint, baffle and fixed plate, fixed plate fixed connection be in on the slider, the fixed plate is followed the direction setting of driving motor's output shaft, the one end at fixed plate top is provided with the baffle, baffle one side the fixed plate is provided with a pair of correspondence along length direction the link, one of them be fixed with the second splint on the link, another the link is fixed two the telescopic link, the end fixing of telescopic link has first splint, first splint with the opposite side of second splint is provided with relative arc wall along length direction respectively.

Preferably, the connecting frame comprises a pair of cylinders, each cylinder is composed of a sliding rod connected in a sliding mode and a connecting rod connected with the tops of the two sliding rods, fastening screws penetrate through the tops of the side walls of the cylinders and are screwed, and one ends of the fastening screws penetrate into the cylinders and abut against the sliding rods.

Preferably, the telescopic link includes loop bar, slide bar and spring, the loop bar is fixed in the connecting rod, the loop bar is provided with the deep trouth along length direction, deep trouth sliding connection has the slide bar, the slide bar with be provided with the spring between the tank bottom of deep trouth, the end fixing of slide bar has first splint.

Compared with the prior art, the utility model provides a mouth device is restrainted to the orificial heat conduction copper pipe in fan coil has following beneficial effect:

the utility model provides a fan coil pipe heat conduction copper pipe mouth of pipe binding device the output shaft of driving motor coaxial fixation the fixed cylinder, coaxial fixation has the correction seat in the fixed cylinder, be provided with on the correction seat and be circular echelonment sunken, when the copper pipe just pegs graft in the sunken, guarantee copper pipe and driving motor's output shaft coaxial arrangement, coaxial rotation connects the driving-disc in the fixed cylinder, the central both sides of driving-disc correspond the slip and are provided with the blade, when the driving-disc rotates, two the synchronous opposite directions or back-to-back movement of blade makes two the blade keep equal apart from the distance of fixed cylinder axis, thereby makes the blade the tip cutting effect the same with the copper pipe of the coaxial setting of prime number fixed cylinder, when binding the tip of copper pipe, the binding effect is more even, the driving disc drives the blade to slide so as to control the degree of the blade extending out of the gap, so that the blade can perform different degrees of opening restriction on the end part of the copper pipe, and the requirement of the opening restriction of the copper pipe is met; the correcting seat adopts multistage circular step-shaped depressions, copper pipes with different diameters are inserted into the depressions with different diameters, and the requirements of pipe orifice closing of the copper pipes with various specifications can be met.

In addition, anchor clamps pass through the telescopic link control first splint press from both sides tightly the second splint, when feeding, through the pulling the handle of first splint will first splint with the second splint parts, places the copper pipe first splint with between the arc wall between the second splint, loosen the handle makes first splint press from both sides tightly the second splint, during the unloading, the pulling the handle will first splint with the second splint parts and takes off the copper pipe, and the unloading of feeding is convenient, easy operation, through rotating the crank drives drive screw rotates, further control anchor clamps remove to make and fix copper pipe on the anchor clamps gets into or shifts out beam mouth mechanism, convenient operation is simple.

Drawings

Fig. 1 is a schematic structural view of a preferred embodiment of a mouth-tying device for a heat-conducting copper pipe orifice in a fan coil according to the present invention;

FIG. 2 is a schematic view of the structure of the fixture shown in FIG. 1;

FIG. 3 is a cross-sectional view of the telescoping pole structure of FIG. 2;

FIG. 4 is a schematic structural view of the pinch mechanism shown in FIG. 1;

FIG. 5 is a cross-sectional schematic view of the collar mechanism configuration shown in FIG. 4;

fig. 6 is a schematic structural diagram of a driving disc in the pinch mechanism.

Reference numbers in the figures: 1. the device comprises a rack, 11, a support plate, 12, support legs, 2, a driving motor, 3, a binding mechanism, 31, a fixed cylinder, 32, a correction seat, 33, a blade, 34, a fastening bolt, 35, a driving disc, 36, a bevel gear, 4, a clamp, 41, a first clamping plate, 42, a connecting frame, 43, a telescopic rod, 431, a sleeve rod, 432, a sliding rod, 433, a spring, 44, a second clamping plate, 45, a baffle, 46, a fixed plate, 5, a transmission mechanism, 51, a sliding block, 52, a transmission screw, 53 and a crank.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and embodiments.

Please refer to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6, in which fig. 1 is a schematic structural diagram of a mouth tying device for a heat conducting copper pipe mouth in a fan coil according to a preferred embodiment of the present invention; FIG. 2 is a schematic view of the structure of the fixture shown in FIG. 1; FIG. 3 is a cross-sectional view of the telescoping pole structure of FIG. 2; FIG. 4 is a schematic structural view of the pinch mechanism shown in FIG. 1; FIG. 5 is a cross-sectional schematic view of the collar mechanism configuration shown in FIG. 4; fig. 6 is a schematic structural diagram of a driving disc in the pinch mechanism.

Referring to fig. 1, a mouth tying device for a heat conducting copper pipe orifice in a fan coil includes a frame 1, the frame 1 is composed of a support plate 11 and support legs 12 at four corners of the bottom of the support plate 11, a driving motor 2 is fixed at the top of the support plate 11, the driving motor 2 is horizontally arranged, a control switch 21 is fixed on the support plate 11 beside the driving motor 2, the control switch 21 is electrically connected with the driving motor 2, a mouth tying mechanism 3 is fixed at an output shaft of the driving motor 2, the control switch 21 is communicated with a power supply, a sliding groove is arranged on the support plate 11 facing an output shaft of the driving motor 2, the sliding groove is arranged along the direction of the output shaft of the driving motor 2, a transmission mechanism 5 is arranged at the sliding groove, specifically, the transmission mechanism 5 includes a sliding block 51, the sliding block 51 is slidably connected in the sliding groove, a transmission screw 52 is rotatably connected in the sliding groove along the length direction, the transmission screw 52 is screwed with the sliding block 51 in a penetrating manner, one end of the transmission screw 52 extends out of the sliding groove to one side of the supporting plate 11, a crank 53 is fixed at the end part of the transmission screw 52 extending out of the sliding groove, a clamp 4 is fixed on the sliding block, the transmission screw 52 is driven to rotate by rotating the crank 53, the transmission screw 52 rotates to transmit force to the sliding block 51 through threads, the sliding block 51 slides along the sliding groove, and the sliding block 51 drives the clamp 4 to move.

Referring to fig. 2, the fixture 4 includes a first clamping plate 41, a connecting frame 42, an expansion link 43, a second clamping plate 44, a baffle 45 and a fixing plate 46, the fixing plate 46 is fixedly connected to the sliding block 51, the fixing plate 46 is disposed along the direction of the output shaft of the driving motor 2, the baffle 45 is disposed at one end of the top of the fixing plate 46, the fixing plate 46 is disposed along the length direction with a pair of corresponding connecting frames 42, specifically, the connecting frame 42 includes a pair of cylinders, a sliding rod slidably connected in each cylinder and a connecting rod connecting the tops of the two sliding rods, a fastening screw is screwed through the top of the side wall of each cylinder, one end of the fastening screw penetrates into each cylinder and abuts against the sliding rod, the second clamping plate 44 is fixed on the connecting rod of one of the connecting frames 42, and the expansion link 43 is fixed at two ends of the connecting rod at the top of the other connecting frame 42, in a specific implementation process, referring to fig. 3, the telescopic rod 43 includes a loop bar 431, a sliding rod 432 and a spring 433, the loop bar 431 is fixed to the connecting rod, the loop bar 431 is provided with a deep groove along a length direction, the deep groove is connected with the sliding rod 432 in a sliding manner, the spring 433 is arranged between the sliding rod 432 and a groove bottom of the deep groove, the end of the sliding rod 432 is fixed with the first clamping plate 41, one side of the first clamping plate 41 is provided with a handle, the first clamping plate 41 and the second clamping plate 44 are mutually abutted, opposite sides of the first clamping plate 41 and the second clamping plate 44 are respectively provided with opposite arc-shaped grooves along the length direction, in the specific implementation process, the first clamping plate 41 is detachably fixed to the sliding rod 432, the second clamping plate 44 is detachably fixed to the connecting rod, the first clamping plate 41 and the second clamping plate 44 are provided with a plurality of sets, different sets of arc-shaped grooves on opposite sides of the first clamping plate 41 and the, copper pipes of different diameters clamped by the first clamping plate 41 and the second clamping plate 44 of different groups are aligned with the bunching mechanism 3 by adjusting the height of the connecting frame 42.

Referring to fig. 4 and 5 in combination, the mouth tying mechanism 3 includes a fixed cylinder 31, one end of the fixed cylinder 31 is provided with a cylindrical connecting sleeve, the connecting sleeve is fixedly connected to an output shaft of the driving motor 2, an inner bottom surface of the fixed cylinder 31 is rotatably connected to a driving disc 35, as shown in fig. 6, the driving disc 35 is in a circular cake shape, the driving disc 35 is coaxially arranged with the fixed cylinder 31, one side of the driving disc 35 is in a bevel gear-shaped structure, a rotating shaft is fixed at the middle of the bevel gear-shaped structure, a bearing is fixed on the inner bottom surface of the fixed cylinder 31, an outer ring of the bearing is fixed on the inner bottom surface of the fixed cylinder 31, the rotating shaft is fixed on an inner ring of the bearing, the other side of the driving disc 35 is a thread groove, a bevel gear 36 is rotatably connected to a side wall of the fixed cylinder 31, and one end of the bevel gear-shaped structure where the bevel gear 36 is toothed, a screw cap which is convenient for rotating the bevel gear 36 is arranged at one end of the bevel gear 36 penetrating out of the fixed cylinder 31, a fastening bolt 34 is further penetrated and screwed on the side wall of the fixed cylinder 31, one end of the fastening bolt 34 penetrating into the fixed cylinder 31 is abutted against the side wall of the driving disc 35, a correction seat 32 is fixed inside the fixed cylinder 31 close to one side of the driving disc 35 provided with a thread groove, the main body of the correction seat 32 is of a cylindrical structure, the outer diameter of the cylindrical structure is equal to the inner diameter of the fixed cylinder 31, the cylindrical structure is fixed inside the fixed cylinder 31, a recess is arranged at one end of the cylindrical structure facing the opening of the fixed cylinder 31, the recess is in a circular step shape with the gradually reduced caliber from outside to inside, and circular steps contained in the circular step shape are all coaxially arranged with an output shaft of the driving motor 2, the ratio of the height to the width of each circular step is fixed, a gap is arranged on the correction seat 32, the gap passes through the center shaft of the correction seat 32, the gap divides the recess into two semicircular parts, the gap is communicated with the recess and the outer side wall of the cylindrical structure and is communicated with the recess and the other end of the cylindrical structure, two ends of the gap are respectively connected with a blade 33 in a sliding manner, the thickness of the blade 33 is equal to the width of the gap, the blade 33 is in the shape of a right-angled triangle, the cutting edge of the blade 33 is arranged on the hypotenuse of the right-angled triangle, one right-angled edge of the right-angled triangle is arranged along the length direction of the side wall of the correction seat 32, the other right-angled edge of the right-angled triangle is abutted against the driving disc 35, a bulge is arranged on the other right-angled edge, the bulge is inserted in a thread slot in a sliding, the drive disc 35 in gear with the bevel gear 36 is driven to rotate by rotating the bevel gear 36, the thread groove on the driving disk 35 rotates, the thread groove drives the two blades 33 to slide in the opposite direction or in the opposite direction through the protrusions, so that the edge portion of the blade 33 is exposed from the slit at the junction of the adjacent circular steps, the exposed degree can be adjusted, copper pipes with different diameters are inserted into the circular steps with corresponding diameters, when the copper pipes are just inserted into the circular steps, the copper pipes are coaxially arranged with the output shaft of the driving motor 2 and the mouth binding mechanism 3, the output shaft of the second motor 2 drives the bunching mechanism 3 to rotate, the blade is utilized to cut off the edge angle of the end part of the copper pipe, adjusting the position of the blade 33 by rotating the disk adjusts the extent of the cut to the edge angle of the blade 33.

The utility model provides a fan coil pipe medium heat conduction copper pipe mouth of pipe's bundle mouthful device's principle as follows:

when the cutting tool is used, the bevel gear 36 is rotated to drive the driving disc 35 in tooth connection with the bevel gear 36 to rotate, the thread groove on the driving disc 35 rotates, the thread groove drives the two blades 33 to slide towards or away from each other through the protrusions, so that the blade edge parts of the blades 33 are exposed from the gaps at the connection parts of the adjacent circular steps, and the exposed degree of the blades 33 is adjusted by rotating the bevel gear 36; the spring 433 is forced to contract by pulling the grip on the first clamping plate 41, the sliding rod 432 slides along the deep groove of the loop bar 431, so that the telescopic rod 43 is integrally contracted, the first clamping plate 41 is separated from the second clamping plate 44, a copper pipe is clamped between the first clamping plate 41 and the second clamping plate 44, copper pipes with different diameters can be selected from different first clamping plates and second clamping plates, and when the first clamping plate and the second clamping plate are replaced, the height of the connecting frame 42 needs to be adjusted, so that the copper pipe is aligned with the tying mechanism 3; the crank 53 is rotated to drive the transmission screw 52 to rotate, the transmission screw 52 rotates to transmit force to the sliding block 51 through threads, the sliding block 51 slides along the sliding groove, the sliding block 51 drives the clamp 4 to move, so that a copper pipe fixed on the clamp 4 slowly extends into the bunching mechanism 3, when the copper pipe is just inserted into a circular ladder, the copper pipe is coaxially arranged with the output shaft of the driving motor 2 and the bunching mechanism 3, the power supply 21 is turned on, the output shaft of the driving motor 2 keeps rotating, the output shaft of the second motor 2 drives the bunching mechanism 3 to rotate, the blade is used for cutting off the edge angle of the end part of the copper pipe, and the cutting degree of the blade 33 on the edge angle is adjusted through the position of the rotating disc to adjust the position of the blade 33.

The utility model provides a fan coil pipe mouth of pipe heat conduction copper pipe mouth of pipe device the output shaft of driving motor 2 coaxial fixation the fixed cylinder 31, coaxial fixation has in the fixed cylinder 31 the correction seat 32, be provided with the sunken of circular echelonment on the correction seat 32, when the copper pipe just pegs graft in the sunken, guarantee the copper pipe and the coaxial setting of output shaft of driving motor 2, coaxial rotation connects the driving-disc 35 in the fixed cylinder 31, the central both sides of driving-disc 35 correspond the slip be provided with the blade 33, when the driving-disc 35 rotates, two synchronous opposite directions or back-to-back movement of blade 33 makes two the blade 33 keep equal apart from the distance of fixed cylinder 31 axis, thereby make the blade 33 to the tip cutting effect of the copper pipe of coaxial setting with the prime number fixed cylinder 31 the same, when tying the tip of copper pipe, the mouth-closing effect is more uniform, and the degree that the cutting edge of the blade 33 extends out of the gap can be controlled by driving the blade 33 to slide by the driving disc 35, so that the blade 33 can close the end of the copper pipe in different degrees, and the requirement of the mouth-closing of the opening of the copper pipe is met; the correcting seat 32 adopts multistage circular step-shaped depressions, and copper pipes with different diameters are inserted into the depressions with different diameters, so that the requirements of pipe orifice closing of copper pipes with various specifications can be met.

In addition, the clamp 4 controls the first clamping plate 41 to clamp the second clamping plate 44 through the telescopic rod 43, when charging, the first clamping plate 41 and the second clamping plate 44 are separated by pulling the handle of the first clamping plate 41, a copper pipe is placed between the arc-shaped grooves between the first clamping plate 41 and the second clamping plate 44, the handle is loosened to enable the first clamping plate 41 to clamp the second clamping plate 44, when discharging, the handle is pulled to separate the first clamping plate 41 and the second clamping plate 44 to take down the copper pipe, charging and discharging are convenient, operation is simple, the crank 53 is rotated to drive the transmission screw 52 to rotate, the clamp 4 is further controlled to move, so that the copper pipe fixed on the clamp 4 enters or moves out of the tying mechanism 3, and operation is simple.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims (7)

1. A mouth-binding device of a heat-conducting copper pipe mouth in a fan coil is characterized by comprising a frame (1), wherein,

a driving motor (2) is fixed at the top of the rack (1), and the driving motor (2) is electrically connected with a power supply through a control switch (21);

a fixing barrel (31) which is coaxially arranged is fixed on an output shaft of the driving motor (2), a correction seat (32) is fixed inside the fixing barrel (31), one end of the correction seat (32) facing to a barrel opening is provided with an annular step-shaped recess with gradually enlarged caliber, one end of the correction seat (32) back to the barrel opening is the bottom surface of the correction seat (32), a gap is arranged on the correction seat (32), the gap extends from the recess to the side wall and the bottom surface of the correction seat (32) along the plane of a central shaft of the correction seat (32), a driving disk (35) is rotatably connected inside the fixing barrel (31) opposite to the bottom surface of the correction seat (32), one side of the driving disk (35) opposite to the correction seat (32) is provided with a thread groove, a blade (33) is arranged in the gap in a sliding manner, and a protrusion is arranged on the blade (33), the bulge is inserted in the thread groove in a sliding manner;

and a clamp (4) is arranged on the rack (1) opposite to the output shaft of the driving motor (2) in a sliding manner.

2. The mouth-tying device of the heat conducting copper pipe orifice in the fan coil according to claim 1, characterized in that a bevel gear (36) is rotatably connected through the side wall of the fixed cylinder (31), a bevel gear-like structure is arranged on the side of the driving disk (35) away from the bottom surface, and the bevel gear (36) is in gear joint with the bevel gear-like structure.

3. The fan coil pipe mouth bundling device according to claim 1, wherein a fastening bolt (34) is screwed through the side wall of the fixed cylinder (31), and one end of the fastening bolt (34) penetrating into the fixed cylinder (31) abuts against the side wall of the driving disk (35).

4. The mouth restraining device for the heat conduction copper pipe orifice in the fan coil according to claim 1, wherein a sliding groove is formed in the rack (1) and faces an output shaft of the driving motor, a sliding block (51) is connected in the sliding groove in a sliding mode, a transmission screw rod (52) is connected in the sliding groove in a rotating mode, the transmission screw rod (52) penetrates through and is in threaded connection with the sliding block (51), one end of the transmission screw rod (52) penetrates through the sliding groove, and a handle (53) is fixed to one end of the transmission screw rod (52) penetrating out of the sliding groove.

5. The mouth tying device for the heat conducting copper pipe orifices in the fan coil pipe according to claim 4, wherein the clamp (4) comprises a first clamping plate (41), a connecting frame (42), a telescopic rod (43), a second clamping plate (44), a baffle plate (45) and a fixing plate (46), the fixing plate (46) is fixedly connected to the sliding block (51), the fixing plate (46) is arranged along the direction of the output shaft of the driving motor (2), the baffle plate (45) is arranged at one end of the top of the fixing plate (46), a pair of corresponding connecting frames (42) is arranged on the fixing plate (46) at one side of the baffle plate (45) along the length direction, the second clamping plate (44) is fixed on one of the connecting frames (42), the two telescopic rods (43) are fixed on the other connecting frame (42), and the first clamping plate (41) is fixed at the end of the telescopic rod (43), opposite sides of the first clamping plate (41) and the second clamping plate (44) are respectively provided with opposite arc-shaped grooves along the length direction.

6. The fan coil pipe mouth tying device according to claim 5, wherein the connecting frame (42) comprises a pair of cylinders, each cylinder is composed of a sliding rod connected in a sliding mode and a connecting rod connected with the tops of the two sliding rods, a fastening screw penetrates through the top of the side wall of each cylinder, and one end of the fastening screw penetrates through each cylinder and abuts against the corresponding sliding rod.

7. The mouth tying device for the heat conducting copper pipe orifices in the fan coil pipe according to claim 5, wherein the telescopic rod (43) comprises a sleeve rod (431), a sliding rod (432) and a spring (433), the sleeve rod (431) is fixed on the connecting rod, the sleeve rod (431) is provided with a deep groove along the length direction, the sliding rod (432) is connected with the deep groove in a sliding manner, the spring (433) is arranged between the sliding rod (432) and the groove bottom of the deep groove, and the first clamping plate (41) is fixed at the end part of the sliding rod (432).

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