CN215395692U

CN215395692U - Double-drawer telescopic oblique saw bracket

Info

Publication number: CN215395692U
Application number: CN202023348393.5U
Authority: CN
Inventors: 盛希虎; 李宝
Original assignee: Jinhua Yahu Tools Co Ltd
Current assignee: Jinhua Yahu Tools Co Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2022-01-04
Anticipated expiration: 2030-12-31

Abstract

The utility model relates to a double-extraction telescopic miter saw support, which comprises a support table board and foot rods, wherein the support table board comprises two parallel hollow long pipes and a short rod vertically connected between the two hollow long pipes, and each long pipe is sleeved with two extension rods in a reverse direction; the end cover assembly comprises two passing end covers and a middle part connected between the two passing end covers, the passing end covers are connected to the end part of the long pipe in an annular mode, and the cover surface of the passing end cover is provided with a passing hole for the extension rod to pass in a telescopic mode. The extension rod is positioned in an eccentric rotation mode in a telescopic mode, so that the telescopic positioning is fast and convenient; the table board is provided with the buckle type screw rod seat, the screw rod seat is in an eccentric locking structure basis, and the torsion spring and the buckle are combined for double locking, so that the screw rod seat is more firmly connected with the table board of the oblique fracture saw support, and the safety and the stability are improved.

Description

Double-drawer telescopic oblique saw bracket

Technical Field

The utility model belongs to the field of woodworking supports, and particularly relates to a double-drawer telescopic miter saw support.

Background

During woodworking, the miter saw support is used for supporting and fixing the miter saw and supporting wood. The oblique cutting saw bracket is used for fixing the oblique cutting saw through the screw rod seat, and the screw rod seat is fixed on the table top of the oblique cutting saw bracket. In order to match long and short specifications of wood, a telescopic extension rod is additionally arranged on the oblique cutting saw support, a common telescopic adjusting mode is a threaded knob type, the operation is slow and tedious, and the working efficiency is influenced. The screw rod seat is usually matched with the oblique-cutting saw support for use, and the screw rod seat can fix the screw rod seat on the table top of the oblique-cutting saw support by utilizing the clamping groove on one hand, and can be fixed with the base of the oblique-cutting saw on the other hand, so that the oblique-cutting saw is integrally and stably fixed on the oblique-cutting saw support finally. The clamping and fixing of the screw rod seat and the oblique saw support are completed by the rotating operation of the handle, the end part of the handle is provided with an eccentric part, and the eccentric part is abutted against the clamping block through rotation and pushes the clamping block to clamp the table top of the oblique saw support. In the process of woodworking operation, if the handle is accidentally turned over by external acting force, the screw rod seat is very easy to loosen and fall off, even the oblique saw slips, and potential safety hazards exist. In view of the above problems, the present unit technician modifies the miter saw support and the screw base structure.

Disclosure of Invention

The utility model mainly aims at the problem of telescopic adjustment and positioning of the extension rod of the oblique fracture saw bracket and the problem of stability of connection of the screw rod seat and the bracket table surface, and provides the double-extraction telescopic oblique fracture saw bracket, wherein the telescopic positioning of the extension rod adopts an eccentric rotation positioning mode, and is quick and convenient; the table top is provided with a buckle type screw rod seat, and the screw rod seat is based on an eccentric locking structure and is combined with the torsional spring and the buckle for double locking, so that the screw rod seat is more firmly connected with the table top of the oblique fracture saw bracket, and the safety and the stability are improved; the table top is provided with a tool box for placing tools conveniently; wheels and a handle are arranged at the end part of the table top, so that the table top is convenient to push, pull and carry; the foot rod is provided with a fine adjustment mechanism, and when the ground is uneven, stable support can be achieved through the fine adjustment mechanism.

The technical problem of the utility model is implemented by the following technical scheme: a double-extraction telescopic miter saw support comprises a support table board and foot rods for supporting the support table board, wherein the support table board comprises two parallel hollow long pipes and a short rod vertically connected between the two hollow long pipes, two extension rods are sleeved in each long pipe in a reverse direction, the extending directions of the two extension rods relative to the long pipes are opposite, and a T-shaped roller support for supporting materials is arranged at the end parts of the two parallel extension rods at the same end; the end cover assembly comprises two passing end covers and a middle part connected between the two passing end covers, the passing end covers are annularly sleeved at the end part of the long pipe, and the cover surfaces of the passing end covers are provided with passing holes for the extension rods to pass through in a telescopic manner;

a screw rod seat for fixing the oblique fracture saw is arranged on the table surface of the bracket; the screw rod seat comprises a screw rod seat main body, a clamping groove matched with the width and the cross-sectional shape of a table top of the oblique-cutting saw support is formed in the lower portion of the screw rod seat main body, an arc-shaped static clamping block is arranged at one end of the clamping groove, an arc-shaped movable clamping block is rotatably hinged to the other end of the clamping groove, one end, close to the movable clamping block, of the screw rod seat main body is an operating end, an adjusting and locking mechanism used for adjusting the clamping distance between the static clamping block and the dynamic clamping block is arranged at the operating end, and the adjusting and locking mechanism is characterized by comprising a rotary trigger hinged to the screw rod seat main body, a linkage piece hinged to the rotary trigger, extending towards the movable clamping block and capable of being abutted against the movable clamping block, a clamping piece hinged to the rotary trigger and provided with an inwards concave clamping groove, and a positioning column arranged on the screw rod seat main body and capable of forming clamping and positioning with the clamping piece.

Preferably, the quick locking mechanism is arranged above the passing end cover and comprises a bearing seat and an eccentric locking piece, wherein the bearing seat extends upwards from the passing end cover to form a bulge, and the eccentric locking piece is hinged to the bearing seat; simultaneously, the long tube lateral wall that eccentric retaining member corresponds is provided with the through-hole, and then the terminal surface of eccentric retaining member can pass this through-hole and contradict with the extension rod.

Preferably, the parts of the table top of the support, which are close to the two ends, are respectively provided with a tool tray, the tool trays are detachably connected between the two long pipes, and each tool tray is internally provided with a plurality of storage grids.

Preferably, a foot bar supporting frame is respectively fixed below two ends of the table top of the support, and each foot bar supporting frame is rotatably hinged with two oppositely-forked foot bars; the outer side of the foot rod supporting frame at one end is connected with a transverse wheel shaft, and the two ends of the wheel shaft are respectively connected with wheels; the outside of the foot bar supporting frame at the other end is connected with a handle which is convenient to push and pull.

Preferably, the lower end of one of the foot rods is connected with a fine adjustment mechanism, the fine adjustment mechanism comprises a section of stud and a hemispherical rotating piece fixed to the lower end of the stud, and the stud is in threaded connection with the lower end face of the foot rod; the lower ends of the other three foot rods are connected with foot rod pads, each foot rod pad comprises a flat pad and a section of half-open inclined sleeve pipe which extends upwards from the upper part of the flat pad in an inclined way, and the inclined sleeve pipe is sleeved at the lower end of each foot rod.

Preferably, the rotary trigger comprises an eccentric shaft sleeve with an eccentric shaft hole, a connecting part extending from the middle part of the outer side wall of the eccentric shaft sleeve in a fan-shaped outward expansion manner, and a circular arc-shaped handle piece connected to the outer side edge of the connecting part; the rotary trigger is rotatably hinged to the screw rod seat main body through the eccentric shaft hole and the eccentric rotating shaft crossing the eccentric shaft hole.

Preferably, one end of the linkage piece is arranged to be a hinged ring which can be sleeved on the eccentric shaft sleeve in a surrounding mode, and the end face of the other end, close to the movable clamping block, of the linkage piece is arranged to be an arc-shaped abutting face which can be attached to the arc-shaped outer side wall face of the movable clamping block.

Preferably, two ends of the eccentric shaft sleeve of the rotary trigger are respectively hinged with a linkage piece in a ring sleeve mode, the main body of the linkage piece is a rectangular frame body, and the hinged ring is located on the outer side of the end portion of the rectangular frame body; the surface of the lower part of the handle piece of the rotary trigger is provided with an anti-skidding area, and the surface of the anti-skidding area is provided with a concave-convex anti-skidding piece.

Preferably, the upper end of the buckling piece is hinged to the fan-shaped connecting portion of the rotary trigger through the buckling rotating shaft, the buckling rotating shaft is sleeved with the torsion spring, the lower portion of the buckling piece is bent and provided with a clamping groove which is concave relatively, and the clamping groove can be clamped and connected with the positioning column fixed on the screw rod seat main body.

Preferably, the section of the lead screw seat main body is U-shaped, and the lead screw seat main body comprises a top plate positioned on the top surface and side plates positioned on two sides and extending downwards relatively vertically; the middle part of a side plate of the screw rod seat main body is provided with the clamping groove, the opening of the clamping groove faces downwards, and two ends of the clamping groove are arc-shaped; the upper end of the movable clamping block is hinged to the two side plates through a shaft; the static clamping block is arranged to be an arc-shaped plate and is fixed between the two side plates; the upper end of the static clamping block is hinged to the two side plates through a shaft, and a limiting mechanism is arranged on one side of the static clamping block, which is back to the clamping groove; the limiting mechanism comprises a fixing plate fixed between the two side plates, a threaded hole is formed in the middle of the fixing plate, a fastening screw rod is connected in the threaded hole, and the other end of the fastening screw rod is connected to the static clamping block; the adjusting and locking mechanism is positioned between two side plates of the screw rod seat main body, and the positioning column is vertically fixed between the two side plates of the screw rod seat main body; the top plate of the screw rod seat main body is provided with a fastening sliding groove, and a fastening piece for fixing the oblique fracture saw is arranged in the fastening sliding groove.

In summary, compared with the prior art, the utility model has the following advantages:

the extension rod is quickly and conveniently positioned in an eccentric rotation positioning mode in a telescopic mode; the table top is provided with a buckle type screw rod seat, and the screw rod seat is based on an eccentric locking structure and is combined with the torsional spring and the buckle for double locking, so that the screw rod seat is more firmly connected with the table top of the oblique fracture saw bracket, and the safety and the stability are improved; the table top is provided with a tool box for placing tools conveniently; wheels and a handle are arranged at the end part of the table top, so that the table top is convenient to push, pull and carry; the foot rod is provided with a fine adjustment mechanism, and when the ground is uneven, stable support can be achieved through the fine adjustment mechanism.

Drawings

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

FIG. 2 is an exploded view of the screw base of the present invention;

FIG. 3 is a schematic view of the screw base of the present invention when locked;

FIG. 4 is a cross-sectional view of the screw base of the present invention in a locked state;

FIG. 5 is a schematic view of the screw base of the present invention when unlocked;

fig. 6 is a sectional view showing an unlocked state of the screw base of the present invention.

The reference numbers in the figures are: 1. a support table-board; 11. an extension pole; 2. a foot bar; 21. a stud; 22. a rotating member; 23. a flat plate pad; 24. tilting the sleeve; 4. a long tube; 41. a tool tray; 42. a foot bar support frame; 43. a wheel axle; 44. a wheel; 45. a handle; 5. a short bar; 6. an end cap assembly; 62. passing through the end cover; 63. an intermediate portion; 64. a through hole; 7. a quick locking mechanism; 71. a bearing seat; 72. an eccentric locking member;

9. a screw base; 91. a screw base body; 910. a clamping groove; 911. a top plate; 912. a side plate; 913. fastening the chute; 92. a static clamping block; 921. a limiting mechanism; 93. a dynamic clamping block; 94. rotating the trigger; 940. an eccentric shaft hole; 941. an eccentric shaft sleeve; 942. a connecting portion; 943. a handle member; 944. an anti-slip region; 945. an eccentric rotating shaft; 95. a linkage member; 951. a hinge ring; 952. an arc-shaped abutting surface; 96. a fastener; 960. a rotating shaft is buckled; 961. a card slot; 962. a torsion spring; 97 positioning post.

Detailed Description

The utility model is further illustrated with reference to the following figures and examples.

Example 1:

as shown in fig. 1, 2, 3, 4, 5, 6, a double-extraction telescopic miter saw support comprises a support table board 1 and a foot rod 2 for supporting the support table board 1, wherein the support table board 1 comprises two parallel hollow long pipes 4 and a short rod 5 vertically connected between the two hollow long pipes 4, two extension rods are reversely sleeved in each long pipe, the extending directions of the two extension rods relative to the long pipes are opposite, a cross rod is fixed between the end parts of two parallel extension rods 11 at the same end, and a T-shaped roller support for supporting materials is connected to the cross rod.

The end parts of the two long pipes 4 at the two ends of the support table board 1 are connected with end cover assemblies 6, and meanwhile, the end cover assemblies 6 are provided with quick locking mechanisms 7.

The end cover assembly 6 comprises two passing end covers 62 and a middle part 63 connected between the two passing end covers 62, the passing end covers 62 are connected to the ends of the two long pipes 4 in an annular mode, and the cover surfaces of the passing end covers 62 are provided with passing holes 64 for the extension rods 11 to pass through in an extending mode.

The quick locking mechanism 7 is positioned above the passing end cover 62 and comprises a bearing seat 71 and an eccentric locking piece 72, wherein the bearing seat 71 is protruded from the passing end cover 62 in an upward extending manner, and the eccentric locking piece 72 is hinged to the bearing seat 71; meanwhile, the side wall of the long tube 4 corresponding to the eccentric locking member 72 is provided with a through hole, and the end surface of the eccentric locking member 72 can penetrate through the through hole to abut against the extension rod 11.

The parts of the support table board 1 close to the two ends are respectively provided with a tool tray 41, the tool trays 41 can be detachably connected between the two long pipes 4 and can be specifically connected in a direct clamping manner or in a bolt-nut punching and fixing manner and the like, and a plurality of storage grids are arranged in each tool tray 41.

A foot bar supporting frame 42 is respectively fixed below the two ends of the support table-board 1, and each foot bar supporting frame 42 is rotatably hinged with two oppositely-forked foot bars 2; the outer side of the foot rod support frame 42 at one end is connected with a transverse wheel shaft 43, and two ends of the wheel shaft 43 are respectively connected with wheels 44; the outside of the foot bar support frame 42 at the other end is connected with a handle 45 which is convenient for pushing and pulling.

In four leg rods 2, the lower end of one leg rod 2 is connected with a fine adjustment mechanism, the fine adjustment mechanism comprises a section of stud 21 and a hemispherical rotating piece 22 fixed at the lower end of the stud 21, and the stud 21 is connected with the lower end surface of the leg rod in a threaded manner; the lower ends of the other three foot rods 2 are connected with foot rod pads, each foot rod pad comprises a flat pad 23 and a section of half-open inclined sleeve 24 which extends upwards from the upper part of the flat pad 23 in an inclined manner, and the inclined sleeve 24 is sleeved at the lower end of each foot rod 2.

The support table board 1 is provided with two parallel screw rod seats 9, as shown in fig. 2, 3, 4, 5 and 6, each screw rod seat 9 comprises a screw rod seat main body 91, the lower part of each screw rod seat main body 91 is provided with a clamping groove 910 matched with the width and the cross section shape of the oblique saw support table board, one end of each clamping groove 910 is fixed with an arc-shaped static clamping block 92, the other end of each clamping groove 910 is hinged with an arc-shaped movable clamping block 93 through a pin shaft in a rotating mode, one end, close to the movable clamping block 93, of each screw rod seat main body 91 is an operating end, and the operating end is provided with an adjusting and locking mechanism for adjusting the clamping distance between the static clamping block 92 and the dynamic clamping block 93.

The section of the screw rod seat main body 91 is U-shaped, and comprises a top plate 911 positioned on the top surface and side plates 912 positioned on two sides and extending downwards relatively vertically; the middle part of the side plate 912 of the screw rod seat main body 91 is provided with the clamping groove 910, the opening of the clamping groove 910 faces downwards, and two ends of the clamping groove 910 are arc-shaped; the upper end of the movable clamping block 93 is hinged with the two side plates 912 through a shaft; the static clamping block 92 is an arc-shaped plate, and the static clamping block 92 is fixed between the two side plates 912; the upper end of the static clamping block 92 is hinged to the two side plates 912 through a shaft, and a limiting mechanism 921 is arranged on one side of the static clamping block 92, which is back to the clamping groove 910; the limiting mechanism 921 includes a fixing plate fixed between the two side plates 912, a threaded hole is formed in the middle of the fixing plate, a fastening screw rod is connected in the threaded hole, and the other end of the fastening screw rod is connected to the static clamping block 92.

The screw rod seat main body 91 is provided with a fastening sliding chute 913 in a top plate 911 thereof, and a fastening piece for fixing the oblique fracture saw is arranged in the fastening sliding chute 913, and specifically, a stud nut or the like can be adopted.

The adjusting and locking mechanism is installed between the two side plates 912 of the lead screw seat main body 91.

The adjusting and locking mechanism comprises a rotating trigger 94 hinged to the lead screw seat main body, a linkage piece 95 hinged to the rotating trigger 94, extending towards the movable clamping block 93 and capable of abutting against the movable clamping block, a buckling piece 96 hinged to the rotating trigger 94 in a rotating mode and provided with a concave buckling groove 961, and a positioning column 97 fixed to the lead screw seat main body 91 and capable of forming buckling positioning with the buckling piece 96, wherein the positioning column 97 is vertically fixed between two side plates 912 of the lead screw seat main body 91.

The rotary trigger 94 comprises an eccentric shaft sleeve 941 with an eccentric shaft hole 940, a connecting part 942 extending from the middle of the outer side wall of the eccentric shaft sleeve 941 in a fan shape, and a circular arc-shaped handle part 943 connected to the outer side edge of the connecting part 942; the rotary trigger 94 is rotatably hinged to the screw base main body 91 through the eccentric shaft hole 940 and the eccentric rotation shaft 945 crossing the eccentric shaft hole 940.

One end of the linkage 95 is set to be capable of being sleeved on the hinge ring 951 on the eccentric shaft sleeve 941, and the end face of the other end of the linkage 95, which is close to the movable clamping block 93, is set to be an arc abutting surface 952 capable of being attached to the arc outer side wall surface of the movable clamping block 93.

The two ends of the eccentric shaft sleeve 941 of the rotary trigger 94 are respectively hinged to a linkage 95 through a ring sleeve, the main body of the linkage 95 is a rectangular frame, and the hinge 951 is located on the outer side of the end of the rectangular frame.

The upper end of the latch 96 is hinged to the fan-shaped connecting part 942 of the rotary trigger 94 through a latch rotating shaft 960, the torsion spring 962 is sleeved on the latch rotating shaft 960, the lower part of the latch 96 is bent and has a relatively concave slot 961, and the slot 961 can form a snap connection with a positioning column 97 fixed on the screw rod seat main body 91.

The handle member 943 of the rotary trigger 94 is provided with an anti-slip region 944 on the lower plate surface thereof, and the anti-slip region 944 has an uneven anti-slip member on the surface thereof.

The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Claims

1. A double-extraction telescopic miter saw support comprises a support table board (1) and foot rods (2) for supporting the support table board, wherein the support table board comprises two parallel hollow long pipes (4) and a short rod (5) vertically connected between the two hollow long pipes, two extension rods are reversely sleeved in each long pipe, the extending directions of the two extension rods relative to the long pipes are opposite, and the end parts of the two parallel extension rods positioned at the same end are provided with T-shaped roller supports for supporting materials, and is characterized in that end cover assemblies (6) are connected to the two ends of the support table board and the end parts of the two long pipes, and meanwhile, a quick locking mechanism (7) is arranged on each end cover assembly; the end cover assembly comprises two passing end covers (62) and a middle part (63) connected between the two passing end covers, the passing end covers are connected to the end part of the long pipe in an annular mode, and the cover surface of each passing end cover is provided with a passing hole (64) for the extension rod to pass in a telescopic mode;

a screw rod seat for fixing the oblique fracture saw is arranged on the table surface of the bracket; the screw rod seat comprises a screw rod seat main body (91), the lower part of the screw rod seat main body is provided with a clamping groove (910) matched with the width and the section shape of the table top of the oblique saw bracket, one end of the clamping groove is provided with an arc-shaped static clamping block (92), the other end of the clamping groove is rotationally hinged with an arc-shaped movable clamping block (93), one end of the screw rod seat main body close to the movable clamping block is an operating end, the operating end is provided with an adjusting and locking mechanism for adjusting the clamping distance between the static clamping block and the dynamic clamping block, the adjusting and locking mechanism comprises a rotating trigger (94) hinged to the lead screw seat main body, a linkage piece (95) hinged to the rotating trigger, extending towards the movable clamping block and capable of abutting against the movable clamping block, a buckling piece (96) with a concave clamping groove (961) and rotatably hinged to the rotating trigger, and a positioning column (97) arranged on the lead screw seat main body and capable of being clamped and positioned with the buckling piece.

2. The double-extraction telescopic miter saw bracket of claim 1, wherein the quick locking mechanism is arranged above the passing end cover and comprises a bearing seat (71) extending upwards from the passing end cover and protruding, and an eccentric locking member (72) hinged to the bearing seat; simultaneously, the long tube lateral wall that eccentric retaining member corresponds is provided with the through-hole, and then the terminal surface of eccentric retaining member can pass this through-hole and contradict with the extension rod.

3. The double-extraction telescopic miter saw bracket as claimed in claim 1, wherein the table top of the bracket is provided with tool trays (41) near the two ends, the tool trays are detachably connected between the two long pipes, and each tool tray is provided with a plurality of storage cells.

4. The double-extraction telescopic miter saw support frame of claim 1, wherein a foot bar support frame (42) is fixed below each of the two ends of the table surface of the support frame, and each foot bar support frame is rotatably hinged with two oppositely-forked foot bars; the outer side of the foot rod supporting frame at one end is connected with a transverse wheel shaft (43), and the two ends of the wheel shaft are respectively connected with wheels (44); the outer side of the foot bar supporting frame at the other end is connected with a handle (45) which is convenient to push and pull.

5. The double-extraction telescopic miter saw support frame according to claim 4, wherein the lower end of a foot bar is connected with a fine adjustment mechanism, the fine adjustment mechanism comprises a section of stud (21) and a hemispherical rotating member (22) fixed with the lower end of the stud, and the stud is in threaded connection with the lower end surface of the foot bar; the lower ends of the other three foot rods are connected with foot rod pads, each foot rod pad comprises a flat pad (23) and a section of half-open inclined sleeve (24) which extends upwards from the upper part of the flat pad in an inclined way, and the inclined sleeve is sleeved at the lower end of each foot rod.

6. The dual extraction telescopic miter saw frame of claim 1, wherein the rotary trigger comprises an eccentric sleeve (941) having an eccentric shaft hole (940), a connecting part (942) extending from the middle of the outer side wall of the eccentric sleeve in a fan shape, and a handle part (943) connected to the outer side edge of the connecting part in a circular arc shape; the rotary trigger is rotatably hinged to the screw rod seat main body through the eccentric shaft hole and the eccentric rotating shaft crossing the eccentric shaft hole.

7. The double-extraction telescopic miter saw bracket according to claim 6, wherein one end of the linkage piece is provided with a hinge ring (951) capable of being sleeved on the eccentric shaft sleeve in a surrounding manner, and the other end face of the linkage piece close to the movable clamping block is provided with an arc-shaped abutting face (952) capable of being attached to the arc-shaped outer side wall face of the movable clamping block.

8. The dual-extraction telescopic miter saw support frame of claim 7, wherein the two ends of the eccentric bushing of the rotary trigger are respectively hinged with a linkage piece in a ring way, the body of the linkage piece is a rectangular frame body, and the hinge ring is positioned outside the end part of the rectangular frame body; the lower plate surface of the handle piece of the rotary trigger is provided with an anti-slip area (944), and the surface of the anti-slip area is provided with concave and convex anti-slip pieces.

9. The dual-extraction telescoping miter saw frame as claimed in claim 8, wherein the upper end of said latch is hinged to the fan-shaped connection portion of the rotary trigger by a latch shaft (960) and the latch shaft is sleeved with a torsion spring (962), and the lower portion of the latch is bent and has a relatively concave slot capable of engaging with a positioning post fixed to the main body of the screw base.

10. The double-extraction telescopic miter saw bracket of claim 9, wherein the cross section of the screw base body is U-shaped, and the screw base body comprises a top plate (911) on the top surface, side plates (912) on two sides and extending downwards vertically; the middle part of a side plate of the screw rod seat main body is provided with the clamping groove, the opening of the clamping groove faces downwards, and two ends of the clamping groove are arc-shaped; the upper end of the movable clamping block is hinged to the two side plates through a shaft; the static clamping block is arranged to be an arc-shaped plate and is fixed between the two side plates; the upper end of the static clamping block is hinged to the two side plates through a shaft, and one side of the static clamping block, which is back to the clamping groove, is provided with a limiting mechanism (921); the limiting mechanism comprises a fixing plate fixed between the two side plates, a threaded hole is formed in the middle of the fixing plate, a fastening screw rod is connected in the threaded hole, and the other end of the fastening screw rod is connected to the static clamping block; the adjusting and locking mechanism is positioned between two side plates of the screw rod seat main body, and the positioning column is vertically fixed between the two side plates of the screw rod seat main body; the top plate of the screw rod seat main body is provided with a fastening sliding groove (913), and a fastening piece (914) used for fixing the oblique fracture saw is arranged in the fastening sliding groove.