CN114260502A

CN114260502A - Vertical cutting device suitable for narrow and small space

Info

Publication number: CN114260502A
Application number: CN202210004881.9A
Authority: CN
Inventors: 邹纪操; 丁行武; 卜继玲; 邹波; 夏彰阳; 李艺盟; 王凤
Original assignee: Zhuzhou Times New Material Technology Co Ltd
Current assignee: Zhuzhou Times New Material Technology Co Ltd
Priority date: 2022-01-05
Filing date: 2022-01-05
Publication date: 2022-04-01
Anticipated expiration: 2042-01-05
Also published as: CN114260502B

Abstract

The invention discloses a vertical cutting device suitable for a narrow space, which comprises a cutter, an outer sleeve for accommodating the cutter, a pushing assembly, a rotating assembly and a cutting device, wherein the pushing assembly is arranged on the outer sleeve in a matched mode and is in contact with the cutter to enable the cutter to move radially, and the rotating assembly axially penetrates through the pushing assembly and the outer sleeve to assist in rotary cutting of a pipeline; the overcoat middle part is equipped with the cavity cutting area, is equipped with the middle part through-hole with cavity cutting area intercommunication on the rotating assembly, when cutting device cuts, will wait to cut the pipeline and upwards insert in the middle part through-hole from the cavity cutting area, the cutter is in the circumference equipartition bottom the overcoat and extend to in the cavity cutting area with wait to cut the pipeline contact. The invention can realize the cutting of the pipeline with small diameter in a narrow operation space.

Description

Vertical cutting device suitable for narrow and small space

Technical Field

The invention relates to a vertical cutting device suitable for a narrow space, and belongs to the technical field of cutting machines.

Background

When pipeline construction, in order to satisfy the demand such as pipeline shape, length and size under the specific operating mode, generally need cut the pipeline, present pipeline cutting is held cutting means by artifical hand and is carried out the cutting operation more, wastes time and energy, and work efficiency is low, and in order to solve above-mentioned problem, technical personnel in the field have designed pipeline cutting device, through the retrieval, have following patent and relate to pipeline cutting device:

1. the patent numbers are: 202021236004.7 patent, entitled "copper tube cutter", includes a mounting rack, one end of the mounting rack is provided with a roller groove, a roller is arranged in the roller groove, the other end of the mounting rack is provided with a cutter rest platform, one end of the cutter rest platform is embedded in the cutter rest, the cutter rest is provided with a cutter, the cutter corresponds to the roller, and the other end of the cutter rest platform is provided with a regulator which can make the cutter rest move up and down. The utility model discloses a copper pipe cutterbar among can be according to the difference of copper pipe size, through the rotary regulator, drives the flywheel sword and reciprocates to conveniently carry out the cutting of copper pipe, but the cutterbar among this utility model needs great operating space when cutting operation, can't accomplish the cutting task under the narrow and small space.

2. The patent numbers are: 201310684035.7, the patent name of the invention is a built-in thin wall copper tube cutter, which comprises a cylindrical cutter, wherein the cylindrical cutter is sleeved with a shaft sleeve, the shaft sleeve is arranged in a hole at the upper end of a support, the lower end surface of a positioning boss of the shaft sleeve is attached to the upper end surface of the support, the upper part of the cylindrical cutter is sleeved with a rocker arm, the rocker arm is arranged on the shaft sleeve, a threaded hole is arranged at the outer side of one end of the rocker arm, a positioning screw passes through the threaded hole and a side hole on the cylindrical cutter to enable the end part of the positioning screw to be arranged in a positioning groove of a pull rod in the cylindrical cutter, the other end of the rocker arm is provided with a handle, the upper end of the cylindrical cutter is provided with a butterfly nut, the butterfly nut is in threaded connection with the upper part of the pull rod, the lower end of the pull rod is provided with an expansion head, and the screw passes through the threaded hole at the end part of the expansion head and the pull rod to connect the expansion head into a whole. This patent had both guaranteed not wearing and tearing end plate, had guaranteed the required mouth of pipe outcrop size after the cutting again and the uniformity of outcrop size, and the mouth of pipe is round and has not warp, nevertheless because the cutting tool in this patent can only cut the thin-walled copper pipe spare of major diameter in big operating space, can't cut the copper pipe that the hole diameter is little.

In summary, it is necessary to design a vertical cutting device suitable for a narrow space to cut a small-diameter inner hole copper pipe in a narrow operation space.

Disclosure of Invention

The invention aims to provide a vertical cutting device suitable for a narrow space, which can cut a small-diameter pipeline in a narrow operation space.

In order to achieve the purpose, the invention provides the following technical scheme: a vertical cutting device suitable for narrow space comprises a cutter, an outer sleeve for accommodating the cutter, a pushing assembly which is arranged on the outer sleeve in a matching way and is contacted with the cutter to enable the cutter to move radially, and a rotating assembly which is axially arranged in the pushing assembly in a penetrating way and is used for assisting in rotary cutting of a pipeline in the outer sleeve; the overcoat middle part is equipped with the cavity cutting area, is equipped with the middle part through-hole with cavity cutting area intercommunication on the rotating assembly, when cutting device cuts, will wait to cut the pipeline and upwards insert in the middle part through-hole from the cavity cutting area, the cutter is in the circumference equipartition bottom the overcoat and extend to in the cavity cutting area with wait to cut the pipeline contact.

Preferably, the overcoat bottom is equipped with the holding tank that holds the cutter and the fastening groove that is located the holding tank outside in circumference, and the fastening inslot is equipped with the absorption piece that adsorbs the cutter and prevent the cutter from holding the groove roll-off under non-operating condition.

Preferably, the pushing assembly comprises a propping block positioned on the outer sleeve and a pushing block positioned on the propping block and used for pushing the propping block so as to push the propping block to push the cutter; a first spring is arranged between the outer sleeve and the abutting block, and when the outer sleeve and the abutting block are assembled, the first spring is provided with a compression amount.

Preferably, the abutting block comprises an upper end face and a side circumferential face, the side circumferential face extends downwards and forms a plurality of bosses matched with the cutter at intervals, and concave platforms are formed between adjacent bosses; an upper through groove and a lower through groove for the lug boss to extend into and an upper annular groove for the concave table to extend into are arranged on the outer side of the hollow cutting area on the outer sleeve; the holding tank extends to the bottom of supreme lower through-groove from the overcoat bottom of leading to the inslot side from top to bottom, and the fastening groove leads to the overcoat bottom and leads to the inslot intercommunication from top to bottom outside leading to the groove from top to bottom, and the rear portion of cutter stretches into about leading to the groove bottom and with the contact of the absorption block of fastening inslot.

Preferably, the cutter comprises a front portion and a rear portion; the front part is a wedge-shaped blade, and the tail end of the rear part extending into the bottom of the upper and lower through grooves sequentially comprises an arc surface, a first inclined surface and a vertical surface; the bottom of the boss is a second inclined plane matched with the first inclined plane at the rear part of the cutter.

Preferably, the upper part of the upper annular groove is provided with an annular flange, and the annular flange is provided with a long and narrow guide groove positioned above the upper through groove and the lower through groove; the outer side surface of the boss is provided with a long and narrow rib matched with the guide groove; when the abutting block is assembled on the outer sleeve, the convex edge is aligned to the guide groove and moves downwards along the guide groove, the abutting block is screwed until the upper end of the convex edge leaves the lower outlet of the guide groove, and the lower end face of the annular flange and the convex edge form a limiting effect on the abutting block together.

Preferably, a height H1 between an inner end surface of the concave land and a lower end surface of the upper ring groove is not less than a thickness H2 of the thickest part of the cutter.

Preferably, the rotating assembly comprises a rod body which is axially and sequentially arranged in the pushing block, the abutting block and the outer sleeve in a penetrating manner from top to bottom, the lower end of the rod body is connected with the upper end of the outer sleeve through a spline, and the middle through hole is formed in the axial middle of the rod body; the outer peripheral surface of the rod body is provided with external threads, and the propelling block is in threaded connection with the outer side of the propelling block.

Preferably, the lower part of the rod body is provided with a connecting table which is clamped on the upper end surface of the outer sleeve and is positioned on the inner side of the abutting block, and a second spring positioned on the inner side of the first spring is arranged between the connecting table and the pushing block; when the pusher block and the rod body are assembled, a compression amount is set on the second spring.

Preferably, the upper part of the rod body, which is positioned on the external thread, is provided with a raised knurl, and the upper end of the rod body is provided with a hexagonal rod head positioned on the upper part of the raised knurl.

Has the advantages that:

1. according to the pipeline cutting device, the cutter is arranged at the lower part of the outer sleeve, the rod body for placing the pipeline is arranged on the outer sleeve, the pipeline is inserted into the middle through hole of the rod body from the hollow cutting area of the outer sleeve upwards, and then the pipeline is cut by the cutter, so that the technical problem that the traditional cutting device can only cut a large-diameter pipeline in a large operation space and cannot cut a pipeline with a small inner hole diameter in a narrow space is solved.

2. According to the invention, the adsorption block is arranged at the lower part of the outer sleeve to adsorb the cutter, so that the installation position of the cutter in a non-working state is ensured, and the cutter is prevented from sliding out of the accommodating groove.

3. The pipeline cutting device is provided with a propping block which is matched with a cutter and can push the cutter to move in a radial direction, and the position of the cutter and a pipeline is adjusted through the propping block so that the cutter props against the pipeline; the invention also provides a pushing block in threaded connection with the rod body, and the pushing block is used for pushing the abutting block downwards so that the abutting block further pushes the cutter.

4. The invention also comprises a first spring and a second spring which are provided with compression quantities, wherein the first spring provides a certain restoring force for the abutting block and the outer sleeve, so that the assembly compactness is ensured; the second spring provides certain pretightning force for advancing the piece and the body of rod, guarantees under the operating condition to advance the stability of screw-thread fit between piece and the body of rod.

Drawings

Fig. 1 is a schematic perspective view of a cutting device according to an embodiment of the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a sectional view taken along a-a in fig. 2.

Fig. 4 is a sectional view taken in the direction B-B in fig. 2.

Fig. 5 is a perspective view of the outer cover.

Fig. 6 is a perspective view of the outer cover.

Fig. 7 is a schematic perspective view of the abutting block.

Fig. 8 is a schematic structural view of the cutter. (a is a front view, b is a plan view)

Fig. 9 is a schematic structural view of a rod body.

The reference numerals include: 1. a cutter; 2. a jacket; 3. a hollow cutting zone; 4. a middle through hole; 5. a magnet; 6. a propping block; 7. a propulsion block; 8. a first spring; 9. a boss; 10. a concave platform; 11. an upper through groove and a lower through groove; 12. an upper ring groove; 13. a wedge-shaped blade; 14. a cambered surface; 15. a first inclined plane; 16. a vertical plane; 17. a second inclined plane; 18. an annular flange; 19. a guide groove; 20. a rib; 21. a lower end face of the annular flange; 22. an inner end surface of the concave table; 23. the lower end surface of the upper annular groove; 24. a rod body; 25. an external thread; 26. the upper end surface of the outer sleeve; 27. a connecting table; 28. a second spring; 29. embossing; 30. a hexagonal club head; 31. accommodating grooves; 32. a fastening groove; 33. an internal spline; 34. an external spline.

Detailed Description

The invention is described in further detail below with reference to figures 1-9. In fig. 1, the direction M is axial, the direction N is radial, the front portion and the inner side are both sides facing the central axis L, and the rear portion and the outer side are both sides far away from the central axis L.

A vertical cutting device suitable for narrow space is mainly used for cutting a pipeline, particularly for cutting a thin-wall copper pipe with a small inner diameter, and is suitable for cutting operation in the narrow space; the cutting device comprises a cutter 1, an outer sleeve 2 for accommodating the cutter 1, a pushing component which is arranged on the outer sleeve 2 in a matching way and is contacted with the cutter 1 to enable the cutter 1 to move radially, and a rotating component which is axially arranged in the pushing component and the outer sleeve 2 in a penetrating way and assists in rotating and cutting a pipeline; the middle part of the outer sleeve 2 is provided with a hollow cutting area 3, the rotating assembly is provided with a middle through hole 4 communicated with the hollow cutting area 3, when the cutting device cuts, a pipeline to be cut is upwards inserted into the middle through hole 4 from the hollow cutting area 3, and the cutters 1 are circumferentially and uniformly distributed at the bottom of the outer sleeve 2 and extend into the hollow cutting area 3 to be contacted with the pipeline to be cut. The number of the cutters 1 in the embodiment is set according to the requirement of an actual working condition, the number of the cutters 1 in the embodiment is specifically 3, and the 3 cutters are uniformly distributed at the bottom of the outer sleeve 2 along the circumferential direction by taking the central axis L as a reference; the pushing assembly is used for pushing the cutter 1 to enable the cutter 1 to move radially so as to adjust the distance and the position between the cutter 1 and the pipeline, and the cutter 1 is enabled to abut against the pipeline to facilitate the subsequent cutting operation; when the positions of the cutter 1 and the pipeline are adjusted, the cutter 1 abuts against the pipeline tightly, and then the pipeline is rotated by the rotating assembly to cut.

As shown in fig. 5, the bottom of the outer sleeve 2 is provided with an accommodating groove 31 for accommodating the cutter 1 and a fastening groove 32 located outside the accommodating groove 31 in the circumferential direction, and the fastening groove 32 is provided with an adsorbing block for adsorbing the cutter 1 and preventing the cutter 1 from slipping out of the accommodating groove 31 in a non-operating state. Holding tank 31 and fastening groove 32 respectively are 3 with cutter 1 assorted, and the shape of holding tank 31 and cutter 1's shape phase-match, and in holding tank 31 was arranged in to cutter 1, the absorption piece in fastening groove 32 specifically was magnet 5.

The pushing and pressing assembly comprises a propping block 6 positioned on the outer sleeve 2 and a pushing block 7 positioned on the propping block 6 and used for pushing the propping block 6 so as to enable the propping block 6 to push and press the cutter 1; as shown in fig. 7, the abutting block 6 includes an upper end surface and a side circumferential surface, the side circumferential surface extends downward and forms a plurality of bosses 9 at intervals, which are matched with the cutter 1, and concave platforms 10 are formed between adjacent bosses 9, in this embodiment, each of the bosses 9 and the concave platforms 10 is 3; as shown in fig. 5 and 6, an upper through groove 11 into which the boss 9 extends and a lower through groove 12 into which the concave platform 10 extends are provided on the outer jacket 2 outside the hollow cutting region 3, and the circumferential width of the upper through groove 11 and the circumferential width of the lower through groove are greater than the circumferential width of the boss 9; holding tank 31 extends to leading to 11 bottoms from the top down to 2 bottoms of the inboard overcoat of groove 11, and fastening groove 32 leads to 2 bottoms of overcoat in the groove 11 outside from the top down and leads to 11 intercommunications from top to bottom, and cutter 1 puts into holding tank 31 interior back, and cutter 1's rear portion stretches into about leading to 11 bottoms and with fastening groove 32 interior magnet 5 contact, magnet 5 adsorbs and lives cutter 1. A first spring 8 is arranged between the outer sleeve 2 and the abutting block 6, and when the outer sleeve 2 and the abutting block 6 are assembled, the first spring 8 is provided with a compression amount, so that the assembly compactness can be ensured.

As shown in fig. 8, the cutter 1 includes a front portion and a rear portion; the front part is a wedge-shaped blade 13, the wedge-shaped blade 13 extends into the hollow cutting area 3, the rear part extends into the tail end of the bottom of the upper through groove 11 and the lower through groove 11 and sequentially comprises a cambered surface 14, a first inclined surface 15 and a vertical surface 16, and the vertical surface 16 facilitates the magnet 5 to adsorb the cutter 1; the bottom of the boss 9 is a second inclined surface 17 matched with the first inclined surface 15 at the rear part of the cutter 1, when the boss 9 pushes and presses the cutter 1, the second inclined surface 17 is in contact with the first inclined surface 15 and pushes and presses the first inclined surface 15 to enable the cutter 1 to move radially, and the cambered surface 14 facilitates the boss 9 to push and press the cutter 1. When the pipeline is cut, the wedge-shaped blades 13 of the 3 cutters 1 which are axially arranged are tightly abutted against the pipeline in the circumferential direction, so that the pipeline is conveniently and uniformly cut.

As shown in fig. 5 and 6, an annular flange 18 is provided at an upper portion of the upper ring groove 12, and an elongated guide groove 19 is provided on the annular flange 18 above the upper and lower through grooves 11; as shown in fig. 7, the outer side surface of the boss 9 is provided with elongated ribs 20 matched with the guide grooves 19, and the number of the guide grooves 19 and the number of the ribs 20 are 3; when the abutting block 6 is assembled on the outer sleeve 2, the convex rib 20 is aligned with the guide groove 19, the abutting block 6 moves downwards along the guide groove 19, the abutting block 6 is screwed until the upper end of the convex rib 20 leaves the lower outlet of the guide groove 19, the convex rib 20 avoids the guide groove 19, the assembling force is unloaded, and the lower end face 21 of the annular flange and the convex rib 20 jointly limit the abutting block 6. As shown in fig. 3, the height H1 between the inner end surface 22 of the concave platform and the lower end surface 23 of the upper ring groove is not less than the thickness H2 of the thickest part of the cutter 1, so as to avoid the interference between the concave platform 10 and the upper ring groove 12 to the boss 9 pushing the cutter 1.

Wherein, rotating assembly includes that the axial is from last to wearing to locate propulsion piece 7 down in proper order, support the body of rod 24 of tight piece 6 and overcoat 2, and the lower extreme of the body of rod 24 passes through splined connection with the upper end of overcoat 2, and the upper portion of overcoat 3 is equipped with internal spline 33, and the lower extreme of the body of rod 24 is equipped with and internal spline 33 assorted external spline 34, and overcoat 2 and the body of rod 24 pass through splined connection so that the transmission moment of torsion. The middle through hole 4 is arranged in the axial middle of the rod body 24, and when the pipeline is cut, the pipeline extends into the middle through hole 4 of the rod body 24 and extends into the hollow cutting area 3 of the outer sleeve 2; be equipped with external screw thread 25 on the outer peripheral surface of the body of rod 24, propulsion piece 7 threaded connection pushes away tight piece 6 through rotatory propulsion piece 7 outside the body of rod 24, and then makes tight piece 6 bulldoze cutter 1.

As shown in fig. 3 and 4, the lower part of the rod body 24 is provided with a connecting platform 27 clamped on the upper end surface 26 of the outer sleeve and positioned at the inner side of the abutting block 6, and the connecting platform 27 is convenient for positioning the rod body 24 and the outer sleeve 2; a second spring 28 positioned at the inner side of the first spring 8 is arranged between the connecting platform 27 and the pushing block 7; when the pushing block 7 and the rod body 24 are assembled, the second spring 28 is provided with a compression amount to prevent the threaded fit from loosening in a working state, and the stability of the threaded fit between the pushing block 7 and the rod body 24 is ensured. As shown in fig. 9, a raised knurl 29 is provided on the upper portion of the external thread 25 of the rod body 24, the raised knurl 29 is used to increase friction force, a hexagonal rod head 30 on the upper portion of the raised knurl 29 is provided on the upper end of the rod body 24, and when the rod body 24 drives the pipeline to rotate, the hexagonal rod head 30 is used with a wrench to increase operation torque.

The specific implementation mode is as follows:

when a vertical cutting device is needed to cut a pipeline, firstly, a proper cutter 1 is selected according to the external diameter of the pipeline to be cut for assembly, then the pipeline extends into the hollow cutting area 3 of the outer sleeve 2 and is inserted into the middle through hole 4 of the rod body 24 all the way upwards, then the pushing block 7 is screwed downwards to push the abutting block 6 to move downwards, the inclined plane two 17 at the bottom of the lug boss 9 of the abutting block 6 extrudes the inclined plane one 15 at the tail part of the cutter 1, so that the cutter 1 moves radially, when the cutter 1 slightly abuts against the outer surface of the pipeline, the pushing block 7 is stopped from screwing in, then the rod body 24 is rotated by using a wrench through the hexagonal rod head 30 to cut the pipeline, when the rotating rod body 24 has no resistance torque, the rotating rod body 24 is stopped from rotating, the pushing block 7 is screwed again to push the abutting block 6 to move downwards, and the abutting block 6 again extrudes the cutter 1 to abut against the outer surface of the pipeline 1, and then the rod body 24 is rotated to cut the pipeline, and the actions are repeated until the pipeline is cut.

The above examples are only illustrative and not restrictive, and those skilled in the art can make modifications to the embodiments of the present invention as required without any inventive contribution thereto after reading the present specification, but all such modifications are intended to be protected by the following claims.

Claims

1. The vertical cutting device suitable for the narrow space comprises a cutter (1) and is characterized by further comprising an outer sleeve (2) used for containing the cutter (1), a pushing and pressing assembly which is arranged on the outer sleeve (2) in a matched mode and is in contact with the cutter (1) to enable the cutter (1) to move radially, and a rotating assembly which is axially arranged in the pushing and pressing assembly and the outer sleeve (2) in a penetrating mode and assists in rotary cutting of a pipeline; overcoat (2) middle part is equipped with cavity cutting area (3), be equipped with on the rotating assembly with middle part through-hole (4) of cavity cutting area (3) intercommunication, when cutting device cuts, will wait to cut in the pipeline upwards inserts middle part through-hole (4) from cavity cutting area (3), cutter (1) circumference equipartition in overcoat (2) bottom and extend to in cavity cutting area (3) with wait to cut the pipeline contact.

2. The vertical cutting device suitable for narrow and small space according to claim 1, characterized in that, the bottom of the outer sleeve (2) is provided with an accommodating groove (31) for accommodating the cutter (1) and a fastening groove (32) located outside the accommodating groove (31) in the circumferential direction, and an adsorption block for adsorbing the cutter (1) and preventing the cutter (1) from sliding out of the accommodating groove (31) in the non-working state is arranged in the fastening groove (32).

3. The vertical cutting device for small spaces according to claim 2, wherein the pushing assembly comprises an abutting block (6) on the outer sleeve (2) and a pushing block (7) on the abutting block (6) for pushing the abutting block (6) and further pushing the abutting block (6) against the cutter (1); a first spring (8) is arranged between the outer sleeve (2) and the abutting block (6), and when the outer sleeve (2) and the abutting block (6) are assembled, a compression amount is arranged on the first spring (8).

4. The vertical cutting device suitable for narrow spaces according to claim 3, characterized in that the abutting block (6) comprises an upper end surface and a side circumferential surface, the side circumferential surface extends downwards and forms a plurality of bosses (9) matched with the cutting knife (1) at intervals, and concave platforms (10) are formed between the adjacent bosses (9); an upper through groove (11) and a lower through groove (12) for a boss (9) to extend into and an upper annular groove (12) for a concave table (10) to extend into are arranged on the outer side of the hollow cutting area (3) on the outer sleeve (2); holding tank (31) lead to groove (11) inboard overcoat (2) bottom from upper and lower and extend to lead to groove (11) bottom down, fastening groove (32) lead to groove (11) outside overcoat (2) bottom and lead to groove (11) intercommunication from upper and lower, the rear portion of cutter (1) stretch into about lead to groove (11) bottom and with the contact of the absorption block in fastening groove (32).

5. The vertical cutting device for small spaces, according to claim 4, characterized in that said cutting knife (1) comprises a front portion and a rear portion; the front part is a wedge-shaped blade (13), and the tail end of the rear part, which extends into the bottom of the upper and lower through grooves (11), sequentially comprises an arc surface (14), a first inclined surface (15) and a vertical surface (16); the bottom of the boss (9) is provided with a second inclined surface (17) matched with the first inclined surface (15) at the rear part of the cutter (1).

6. The vertical cutting device for narrow spaces according to claim 5, wherein the upper portion of the upper ring groove (12) is provided with an annular flange (18), and the annular flange (18) is provided with a long and narrow guide groove (19) above the upper and lower through grooves (11); the outer side surface of the boss (9) is provided with a long and narrow convex rib (20) matched with the guide groove (19); when the abutting block (6) is assembled on the outer sleeve (2), the convex rib (20) is aligned to the guide groove (19) and the abutting block (6) moves downwards along the guide groove (19) until the upper end of the convex rib (20) leaves the lower outlet of the guide groove (19), the abutting block (6) is screwed, and at the moment, the lower end face (21) of the annular flange and the convex rib (20) jointly limit the abutting block (6).

7. The vertical cutting device for small spaces as claimed in claim 6, wherein the height H1 between the inner end surface (22) of the concave table and the lower end surface (23) of the upper ring groove is not less than the thickness H2 of the thickest part of the cutter (1).

8. The vertical cutting device suitable for narrow and small space according to claim 7, characterized in that the rotating component comprises a rod body (24) which is axially and sequentially arranged in the pushing block (7), the abutting block (6) and the outer sleeve (2) from top to bottom, the lower end of the rod body (24) is connected with the upper end of the outer sleeve (2) through a spline, and the middle through hole (4) is arranged in the axial middle of the rod body (24); the outer circumferential surface of the rod body (24) is provided with an external thread (25), and the propelling block (7) is in threaded connection with the outer side of the propelling block (7).

9. The vertical cutting device suitable for the narrow space according to claim 8, characterized in that the lower part of the rod body (24) is provided with a connecting platform (27) clamped on the upper end surface (26) of the outer sleeve and positioned at the inner side of the abutting block (6), and a second spring (28) positioned at the inner side of the first spring (8) is arranged between the connecting platform (27) and the pushing block (7); when the pusher block (7) and the lever body (24) are assembled, a compression amount is set on the second spring (28).

10. The vertical cutting device for narrow spaces as claimed in claim 9, wherein the upper portion of the shaft body (24) on the external thread (25) is provided with a raised knurl (29), and the upper end of the shaft body (24) is provided with a hexagonal head (30) on the upper portion of the raised knurl (29).