CN220480473U - Cracking-preventing high-precision ultrahigh-hardness tap - Google Patents

Abstract

The utility model relates to the technical field of machine tool tapping, in particular to an anti-cracking high-precision ultrahigh-hardness tap, which comprises: main part and motor still include: the fixed bracket is fixedly arranged at the output end of the motor; the first clamping piece is arranged in the fixed bracket in a sliding manner; one end of the tap is inserted and arranged in the first clamping piece; the annular plate is rotatably arranged on the fixed bracket, and an abutting block is arranged on the annular plate in a threaded manner; the elastic clamping and fixing block is arranged in the fixing support in a sliding manner. According to the anti-cracking high-precision ultrahigh-hardness screw tap, the fixing support is driven to rotate through the motor on the main body, the screw tap on the fixing support is clamped for the first time through the first clamping piece sliding inside, the screw tap slides into the fixing support through lifting of the first clamping piece, and after the first clamping piece is clamped, the annular plate of the fixing support is rotated to be clamped for the second time through abutting the elastic clamping piece and the screw tap.

Description

Cracking-preventing high-precision ultrahigh-hardness tap

Technical Field

The utility model relates to the technical field of machine tool tapping, in particular to an anti-cracking high-precision ultrahigh-hardness tap.

Background

Most of the existing screw taps are fixed on a threaded drilling device, and the screw taps tap a material plate through the fixation of the device and the cooperation of the screw tap and a workbench, for example, the following technologies:

reference is made to publication (bulletin) No.: CN210280769U, publication (date): 2020-04-10, a drilling equipment is disclosed, which comprises a base, be fixed with the stand on the base, be fixed with the roof on the stand top, be fixed with hydro-cylinder and the vertical downward setting of output of hydro-cylinder on the roof, be fixed with the motor on the hydro-cylinder output, the output of motor sets up and is fixed with the drill bit on its output down, be provided with the drill floor on the base, the drill floor corresponds with the drill bit, still be provided with auxiliary fixing device on the drill floor, auxiliary fixing device is including the fixing base that is fixed in on the drill floor, the reference plate that the level is fixed in on the fixing base and set up in the reference plate middle part and supply the via hole of drill bit vertical pass.

Above-mentioned make the flitch keep better fixedly when drilling through the cooperation of drill bit and auxiliary fixture, improve the precision of drilling, but above-mentioned device is according to original fixed mounting mode to the dismouting of tap, can only realize through hexagonal wrench for the tap of device too relies on hexagonal wrench when dismantling, leads to when hexagonal wrench loses, and the staff can't dismantle and assemble the last tap of processing equipment.

Disclosure of Invention

The utility model aims to provide a cracking-resistant high-precision ultrahigh-hardness tap, which is used for solving the problems.

In order to achieve the above object, the present utility model provides the following technical solutions: an anti-cracking high precision ultra-high hardness tap, comprising: main part and motor still include:

the fixed bracket is fixedly arranged at the output end of the motor;

the first clamping piece is arranged in the fixed bracket in a sliding manner;

one end of the tap is inserted and arranged in the first clamping piece;

the annular plate is rotatably arranged on the fixed bracket, and an abutting block is arranged on the annular plate in a threaded manner;

the elastic clamping block is arranged in the fixed support in a sliding manner, the abutting block is in tangent fit with one end of the elastic clamping block, and the elastic clamping block is in abutting fit with the tap in a driving sliding manner.

Preferably, the fixed bracket is provided with an annular groove, the annular plate is fixedly arranged on the sliding plate, and the sliding plate is arranged in the annular groove in a sliding way;

the annular plate is provided with rotating rods in a circumferential array in a threaded rotation manner, and one end of each rotating rod is rotatably arranged at one end of each abutting block;

the fixed support is provided with a first chute which is arranged in a circumferential array, and the abutting block is arranged in the first chute in a sliding manner.

Preferably, the fixing bracket is respectively provided with a first notch and a second notch, and the first notch is communicated with the second notch;

the first notch internal fixation is provided with the mount that is circumference array arrangement, set up the second spout on the mount, the second spout with first spout is linked together, elasticity card solid piece slip set up in the second spout.

Preferably, a fixed block is slidably arranged in the second notch, and the first clamping piece is arranged on the fixed block in a threaded manner;

the fixed support is provided with a first channel which is communicated with the second notch;

the fixed block is provided with a push rod in a sliding manner, one end of the push rod is arranged in the first channel in a sliding manner, the other end of the push rod is fixedly provided with a clamping block, and the clamping block is matched with the fixed support in a clamping manner;

the fixed support is symmetrically provided with clamping pin grooves, the push rod is symmetrically provided with fixing pins, and the fixing pins are matched with the clamping pin grooves in a clamping mode.

Preferably, an annular sliding plate is arranged on the fixed support in a sliding manner, and sliding blocks which are arranged in a circumferential array are fixedly arranged on the annular sliding plate;

the fixed support is provided with a second channel which is arranged in a circumferential array, and the sliding block is arranged in the second channel in a sliding way.

Preferably, the annular plate is provided with first fixing grooves which are arranged in a circumferential array, and the fixing support is provided with second fixing grooves which are arranged in a circumferential array;

the fixed rod is fixedly arranged on the annular sliding plate, the fixed rod is slidably arranged in the first fixed groove and the second fixed groove, and the driving plate is fixedly connected to the annular plate.

Preferably, a first triangular clamping block is fixedly arranged on the screw tap, and a second triangular clamping block is fixedly connected to the first triangular clamping block;

the first triangular clamping block is matched with the elastic clamping block in a clamping way, and the second triangular clamping block is matched with the first clamping piece in a clamping way.

In the technical scheme, the cracking-resistant high-precision ultrahigh-hardness tap provided by the utility model has the following beneficial effects: through motor drive fixed bolster rotation in the main part for fixed tap rotation work on the fixed bolster, tap on the fixed bolster carries out the first time card through inside gliding first fastener and solid, draws through the lift of first fastener, makes the tap slide in to the fixed bolster, after first fastener card is solid, rotates the fixed bolster the crown block through the butt piece on the crown block and supports to push away elasticity card solid piece and tap laminating, carries out the second time card with the tap and solid.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.

FIG. 1 is a schematic diagram of an overall structure according to an embodiment of the present utility model;

fig. 2 is an enlarged schematic view of a portion a according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of a driving assembly according to an embodiment of the present utility model;

FIG. 4 is a schematic cross-sectional view of a driving assembly according to an embodiment of the present utility model;

FIG. 5 is a schematic cross-sectional view of a driving assembly according to an embodiment of the present utility model;

FIG. 6 is a schematic cross-sectional view of a fastening assembly according to an embodiment of the present utility model;

fig. 7 is a schematic structural diagram of a fixing bracket according to an embodiment of the present utility model;

fig. 8 is a schematic structural diagram of a tap according to an embodiment of the utility model.

Reference numerals illustrate:

1. a main body; 2. a motor; 3. a fixed bracket; 4. a ring plate; 5. an annular sliding plate; 6. a push rod; 7. a rotating lever; 8. tapping; 9. a fixed block; 31. a first channel; 32. a second channel; 33. a first notch; 34. a second notch; 35. a first chute; 36. an annular groove; 37. a second fixing groove; 38. a latch groove; 39. a fixing frame; 41. a driving plate; 42. a first fixing groove; 43. a slide plate; 51. a fixed rod; 61. a clamping block; 71. an abutment block; 81. a first triangular clamping block; 82. a second triangular clamping block; 91. a first clamping piece; 101. an elastic clamping block; 391. and a second chute.

Detailed Description

In order to make the technical scheme of the present utility model better understood by those skilled in the art, the present utility model will be further described in detail with reference to the accompanying drawings.

As shown in fig. 1-8, a high precision ultra-high hardness tap for preventing cracking, comprising: body 1 and motor 2, still include:

a fixed bracket 3 fixedly provided at an output end of the motor 2;

a first locking piece 91 slidably provided in the fixed bracket 3;

the screw tap 8 is inserted and arranged in the first clamping piece 91 at one end;

the annular plate 4 is rotatably arranged on the fixed bracket 3, and an abutting block 71 is arranged on the annular plate 4 in a threaded manner;

the elastic clamping block 101 is slidably arranged in the fixed support 3, the abutting block 71 is in tangential fit with one end of the elastic clamping block 101, and the elastic clamping block 101 is in abutting fit with the tap 8 in a driving sliding manner.

Specifically, as can be seen from fig. 1 to fig. 5, the motor 2 on the main body 1 drives the fixing support 3 to rotate, so that the screw tap 8 fixed on the fixing support 3 rotates, when the screw tap 8 is installed, the first clamping piece 91 inside the fixing support 3 is driven to slide from a low position to a high position (as can be seen from fig. 4, the bottom of the fixing support 3 is in a high position, and the top of the fixing support 3 is in a low position), when the first clamping piece 91 slides to a high position, the first clamping piece 91 extends out of the fixing support 3, so that the screw tap 8 can be inserted and fixed in the first clamping piece 91, and after the first clamping piece 91 is clamped, the first clamping piece 91 is pushed to move to a low position, so that the screw tap 8 follows the first clamping piece 91 into the fixing support 3.

Secondly, as can be seen from fig. 4 to 5, after the screw tap 8 is received in the fixing support 3, the ring plate 4 of the fixing support 3 is rotated clockwise, so that the three abutting blocks 71 on the ring plate 4 rotate, the three abutting blocks 71 abut against the screw tap 8 by rotating and pushing the three elastic clamping blocks 101, and when the ring plate 4 cannot rotate, the three abutting blocks 71 abut against the three elastic clamping blocks 101 and the screw tap 8 to completely abut against each other, so that the second clamping effect is achieved.

In the above technical scheme, through motor 2 drive fixed bolster 3 rotation on main part 1 for fixed tap 8 rotation work on the fixed bolster 3, tap 8 on the fixed bolster 3 carries out the first time card through inside gliding first fastener 91 and solid, through the lifting of first fastener 91, make tap 8 slide in to the fixed bolster 3, after first fastener 91 card is solid, rotate the annular plate 4 of fixed bolster 3 and support elasticity card solid 101 and tap 8 laminating through the butt piece 71 on the annular plate 4, carry out the second time card solid with tap 8.

As a further provided embodiment of the present utility model, the fixing bracket 3 is provided with an annular groove 36, the annular plate 4 is fixedly arranged on the sliding plate 43, and the sliding plate 43 is slidably arranged in the annular groove 36;

the annular plate 4 is provided with rotating rods 7 in a circumferential array in a threaded rotation manner, and one end of each rotating rod 7 is rotatably arranged at one end of each abutting block 71;

the fixed bracket 3 is provided with a first chute 35 which is arranged in a circumferential array, and the abutting block 71 is arranged in the first chute 35 in a sliding way.

Secondly, a first notch 33 and a second notch 34 are respectively arranged in the fixed bracket 3, and the first notch 33 is communicated with the second notch 34;

the first notch 33 is fixedly provided with a fixed frame 39 arranged in a circumferential array, the fixed frame 39 is provided with a second chute 391, the second chute 391 is communicated with the first chute 35, and the elastic clamping block 101 is slidably arranged in the second chute 391.

Further, a fixed block 9 is slidably arranged in the second notch 34, and the first clamping piece 91 is arranged on the fixed block 9 in a threaded manner;

the fixed bracket 3 is provided with a first channel 31, and the first channel 31 is communicated with a second notch 34;

the fixed block 9 is provided with a push rod 6 in a sliding manner, one end of the push rod 6 is arranged in the first channel 31 in a sliding manner, the other end of the push rod 6 is fixedly provided with a clamping block 61, and the clamping block 61 is matched with the fixed bracket 3 in a clamping manner;

the fixed bracket 3 is symmetrically provided with a clamping pin groove 38, the push rod 6 is symmetrically provided with a fixed pin, and the fixed pin is in clamping fit with the clamping pin groove 38.

In the last step, a first triangular clamping block 81 is fixedly arranged on the screw tap 8, and a second triangular clamping block 82 is fixedly connected to the first triangular clamping block 81;

the first triangular clamping block 81 is matched with the elastic clamping block 101 in a clamping way, and the second triangular clamping block 82 is matched with the first clamping piece 91 in a clamping way.

Specifically, as can be seen from fig. 3 to 7, the annular plate 4 slides in the annular groove 36 through the sliding plate 43, and the annular plate 4 is limited by longitudinal movement when rotating clockwise, so that the abutting block 71 on the annular plate 4 does not longitudinally move when abutting against the elastic clamping block 101, meanwhile, the rotating rod 7 rotates, the abutting block 71 is controlled to push against the elastic clamping block 101 through the telescopic sliding of the rotating rod 7, the clamping space of the elastic clamping block 101 can be controlled through the rotating rod 7, and the elastic clamping block 101 can clamp different types of screw taps 8, so that diversified use is achieved.

Further, as can be seen from fig. 5 to 7, by rotating the three abutment blocks 71 clockwise in the three first slide grooves 35 (as can be seen from fig. 5, the initial position is shown in the diagram of the abutment blocks 71, the other end of the first slide grooves 35 is the end position), when the three abutment blocks 71 slide to the end position, the three abutment blocks 71 push the three elastic locking blocks 101 to slide in the second slide grooves 391 of the three fixing frames 39 from the low position to the high position (as can be seen from fig. 5, the groove wall of the fixing frame 3 is the low position, and the center of the fixing frame 3 is the high position), and when the elastic locking blocks 101 slide to the high position, the elastic locking blocks 101 are abutted against the first triangular locking blocks 81 to be locked.

Next, as can be seen from fig. 3 to 8, the push rod 6 is pulled first, so that the two fixing pins are separated from the two latch grooves 38, meanwhile, the clamping block 61 is separated from the clamping with the fixing support 3, then the fixing block 9 can be driven by the push rod 6, the push rod 6 is driven to slide from a low position to a high position in the first slot 31 and the second slot 34 (as can be seen from fig. 4, the top end of the first slot 31 is in a low position, the bottom end of the first slot 31 is in a high position), when the push rod 6 slides to a high position, the fixing block 9 follows the push rod 6 to slide from a low position to a high position in the first slot 33 and the second slot 34 (as can be seen from fig. 4, the bottom of the first slot 33 is in a high position, and the top of the second slot 34 is in a low position), and when the fixing block 9 slides to a high position, the first triangular prism 91 extends out of the fixing support 3, so that the second triangular prism 91 can be fast clamped.

Meanwhile, as can be seen from fig. 3 to 8, since the first clamping piece 91 rotates on the fixing block 9 through threads, the model of the first clamping piece 91 can be replaced in a disassembling and replacing mode, meanwhile, the rotating direction of the first clamping piece 91 is opposite to the driving rotating direction of the motor 2, so that the screw tap 8 cannot be loosened during operation, when the screw tap 8 is fixed, the push rod 6 is pushed to slide downwards to drive the screw tap 8 to slide inwards of the fixing bracket 3, when the push rod 6 is pushed to slide downwards, the push rod 6 is pushed again after being rotated, two fixing pins are clamped with the two clamping pin grooves 38, and the clamping block 61 is clamped and fixed with the fixing bracket 3.

As a further provided embodiment of the present utility model, the fixed bracket 3 is slidably provided with an annular sliding plate 5, and the annular sliding plate 5 is fixedly provided with sliding blocks arranged in a circumferential array;

the fixed support 3 is provided with a second channel 32 which is arranged in a circumferential array, and the sliding block is arranged in the second channel 32 in a sliding way.

Further, the annular plate 4 is provided with first fixing grooves 42 which are arranged in a circumferential array, and the fixing bracket 3 is provided with second fixing grooves 37 which are arranged in a circumferential array;

the annular sliding plate 5 is fixedly provided with a fixed rod 51, the fixed rod 51 is slidably arranged in the first fixed groove 42 and the second fixed groove 37, and the annular plate 4 is fixedly connected with a driving plate 41.

Specifically, as can be seen from fig. 3 to 5, when the second triangular clamping block 82 of the tap 8 is clamped with the first clamping block 91, and the first triangular clamping block 81 is clamped with the elastic clamping block 101 in an abutting manner, the annular sliding plate 5 is pushed, so that the annular sliding plate 5 slides in the second channel 32 from a low position to a high position (as can be seen from fig. 4, the top of the fixed bracket 3 is in a low position, and the bottom of the fixed bracket 3 is in a high position), and when the annular sliding plate 5 slides to a high position, the fixed rod 51 is inserted into the first fixed groove 42 and the second fixed groove 37, so that the fixed rod 51 penetrates through the annular plate 4 and the fixed bracket 3, and the whole is fixed by the fixation of the fixed rod 51, so that the fixation of the tap 8 on the fixed bracket 3 is ensured.

Working principle: as can be seen from fig. 1 to 8, when the tap 8 is installed, the push rod 6 is pulled first, so that the two fixing pins are separated from the two clamping pin grooves 38, the clamping block 61 is separated from the clamping with the fixing support 3, then the fixing block 9 can be driven by the push rod 6, the push rod 6 is driven to slide from a low position to a high position in the first groove 31 and the second groove 34, when the push rod 6 slides to a high position, the fixing block 9 follows the push rod 6 to slide from a low position to a high position in the first groove 33 and the second groove 34, when the fixing block 9 slides to a high position, the first clamping piece 91 extends out of the fixing support 3, the second triangular clamping piece 82 of the tap 8 is inserted into the first clamping piece 91, the push rod 6 is driven to slide from a low position, the tap 8 is driven to slide into the fixing support 3, when the push rod 6 is driven to slide to a low position, the push rod 6 is driven to slide again, so that the two fixing pins are clamped with the two clamping pin grooves 38, the fixture block 61 is fixedly clamped with the fixed support 3, when the screw tap 8 enters the fixed support 3, the rotating rod 7 is adjusted to rotate, the pushing depth of the abutting block 71 is controlled through the telescopic sliding of the rotating rod 7, the driving plate 41 is pushed to rotate the ring plate 4 of the fixed support 3 clockwise at the moment, the three abutting blocks 71 rotate clockwise through rotating at the three first sliding grooves 35, when the three abutting blocks 71 slide to the end position, the three abutting blocks 71 push the three elastic clamping blocks 101 to slide from the low position to the high position in the second sliding grooves 391 of the three fixed frames 39, when the elastic clamping blocks 101 slide to the high position, the elastic clamping blocks 101 abut against the first triangular clamping blocks 81 to be clamped, and when the second clamping blocks 82 of the screw tap 8 finish clamping with the first clamping blocks 91, when the first triangular clamping block 81 and the elastic clamping block 101 are in butt clamping, the annular sliding plate 5 is pushed, the annular sliding plate 5 slides in the second channel 32 from a low position to a high position through the sliding block, when the annular sliding plate 5 slides to a high position, the fixing rod 51 is inserted into the first fixing groove 42 and the second fixing groove 37, the fixing rod 51 penetrates through the annular plate 4 and the fixing support 3, the whole is fixed through the fixing of the fixing rod 51, and the fixing of the screw tap 8 on the fixing support 3 is ensured.

Changing the screw tap 8, pushing the annular sliding plate 5 to enable the annular sliding plate 5 to slide in the second channel 32 from a high position to a low position through the sliding block, when the annular sliding plate 5 slides to a low position, the fixing rod 51 is separated from the first fixing groove 42 and the second fixing groove 37, the fixing rod 51 releases the clamping of the annular plate 4 and the fixing bracket 3, the annular plate 4 is rotated anticlockwise, the three abutting blocks 71 release the interference on the three elastic clamping blocks 101, when the three elastic clamping blocks 101 are not stressed, the spring returns to an initial state to push the elastic clamping blocks 101 to release the clamping with the first triangular clamping blocks 81, the push rod 6 is pulled, the two fixing pins are separated from the two clamping pin grooves 38, the clamping block 61 is separated from the clamping with the fixing bracket 3, then the fixing block 9 can be driven by the push rod 6, when the push rod 6 is driven to slide from a low position to a high position in the first channel 31 and the second notch 34, the fixed block 9 follows the push rod 6 to slide from the low position to the high position in the first notch 33 and the second notch 34 when the push rod 6 slides to the high position, the first clamping firmware 91 stretches out of the fixed support 3, the tap 8 is pulled out, when the model needs to be replaced, the first clamping firmware 91 is taken down and replaced through screw rotation, the first clamping firmware 91 of the required model is installed, and the model of the first clamping firmware 91 can be replaced through disassembling and replacing by rotating the first clamping firmware 91 on the fixed block 9, and meanwhile the rotating direction of the installation of the first clamping firmware 91 is opposite to the driving rotating direction of the motor 2, so that the tap 8 cannot be loosened during working.

While certain exemplary embodiments of the present utility model have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the utility model, which is defined by the appended claims.

Claims (7)

1. An anti-cracking high precision ultra-high hardness tap, comprising: main part (1) and motor (2), its characterized in that still includes:

the fixed bracket (3) is fixedly arranged at the output end of the motor (2);

a first locking piece (91) which is slidably provided in the fixed bracket (3);

one end of the tap (8) is inserted and arranged in the first clamping piece (91);

the annular plate (4) is rotatably arranged on the fixed bracket (3), and an abutting block (71) is arranged on the annular plate (4) in a threaded manner;

the elastic clamping block (101) is arranged in the fixed support (3) in a sliding mode, the abutting block (71) is in tangent fit with one end of the elastic clamping block (101), and the elastic clamping block (101) is in abutting fit with the tap (8) in a driving sliding mode.

2. The anti-cracking high-precision ultra-high-hardness screw tap according to claim 1, wherein an annular groove (36) is formed in the fixed support (3), the annular plate (4) is fixedly arranged on a sliding plate (43), and the sliding plate (43) is slidably arranged in the annular groove (36);

the annular plate (4) is provided with rotating rods (7) in a circumferential array in a threaded rotation mode, and one end of each rotating rod (7) is rotatably arranged at one end of each abutting block (71);

the fixed support (3) is provided with first sliding grooves (35) which are arranged in a circumferential array, and the abutting blocks (71) are slidably arranged in the first sliding grooves (35).

3. The anti-cracking high-precision ultra-high-hardness tap according to claim 2, wherein a first notch (33) and a second notch (34) are respectively arranged in the fixed bracket (3), and the first notch (33) is communicated with the second notch (34);

the fixing frame (39) which is arranged in a circumferential array is fixedly arranged in the first notch (33), a second chute (391) is formed in the fixing frame (39), the second chute (391) is communicated with the first chute (35), and the elastic clamping block (101) is slidably arranged in the second chute (391).

4. A high precision ultra-high hardness tap for preventing cracking according to claim 3, characterized in that a fixed block (9) is slidably arranged in the second notch (34), and the first clamping member (91) is arranged on the fixed block (9) in a threaded manner;

a first channel (31) is formed in the fixed support (3), and the first channel (31) is communicated with the second notch (34);

the fixed block (9) is provided with a push rod (6) in a sliding manner, one end of the push rod (6) is arranged in the first channel (31) in a sliding manner, the other end of the push rod (6) is fixedly provided with a clamping block (61), and the clamping block (61) is matched with the fixed bracket (3) in a clamping manner;

the fixing support (3) is symmetrically provided with clamping pin grooves (38), the push rod (6) is symmetrically provided with fixing pins, and the fixing pins are matched with the clamping pin grooves (38) in a clamping mode.

5. The cracking-resistant high-precision ultra-high-hardness screw tap according to claim 1, wherein an annular sliding plate (5) is arranged on the fixed support (3) in a sliding manner, and sliding blocks which are arranged in a circumferential array are fixedly arranged on the annular sliding plate (5);

the fixed support (3) is provided with a second channel (32) which is arranged in a circumferential array, and the sliding block is arranged in the second channel (32) in a sliding mode.

6. The anti-cracking high-precision ultra-high-hardness screw tap according to claim 5, wherein the annular plate (4) is provided with first fixing grooves (42) which are arranged in a circumferential array, and the fixing support (3) is provided with second fixing grooves (37) which are arranged in a circumferential array;

the novel sliding plate further comprises a fixed rod (51) fixedly arranged on the annular sliding plate (5), the fixed rod (51) is slidably arranged in the first fixed groove (42) and the second fixed groove (37), and the annular plate (4) is fixedly connected with a driving plate (41).

7. The anti-cracking high-precision ultra-high-hardness screw tap is characterized in that a first triangular clamping block (81) is fixedly arranged on the screw tap (8), and a second triangular clamping block (82) is fixedly connected to the first triangular clamping block (81);

the first triangular clamping block (81) is matched with the elastic clamping block (101) in a clamping mode, and the second triangular clamping block (82) is matched with the first clamping piece (91) in a clamping mode.