阅读说明：本技术 一种刀头可调节的镗床加工刀具 (Boring machine processing cutter with adjustable cutter head ) 是由 周振峰 斯武君 斯泽辉 林松道 于 2021-10-29 设计创作，主要内容包括：本发明公开了一种刀头可调节的镗床加工刀具,涉及镗刀技术领域。包括镗杆,镗杆为中空结构,镗杆的顶部设置有第一盒体和两个第二盒体,第一盒体固定安装在镗杆的顶部中心处,且第一盒体的形状为“工”字型,第一盒体上设置有第一转轴、第一齿轮、两个第一齿条和两个锁紧组件,第一转轴转动连接在第一盒体的中部,第一齿轮同轴套设在第一转轴的上部,且第一转轴的下端贯穿第一盒体并延伸至镗杆的内部,第一转轴的下端设置有距离调节组件。镗刀片可转动角度,更换尖端以便后续继续使用本装置进行镗床加工,该设置充分利用了镗刀片的多个尖端进行加工,并解决了镗刀片由于可以更换尖端而带来镗孔时可能会晃动的问题。(The invention discloses a boring machine machining cutter with an adjustable cutter head, and relates to the technical field of boring cutters. The boring rod is of a hollow structure, a first box body and two second box bodies are arranged at the top of the boring rod, the first box body is fixedly installed at the center of the top of the boring rod, the first box body is in an I shape, a first rotating shaft, a first gear, two first racks and two locking assemblies are arranged on the first box body, the first rotating shaft is rotatably connected to the middle of the first box body, the first gear is coaxially sleeved on the upper portion of the first rotating shaft, the lower end of the first rotating shaft penetrates through the first box body and extends to the inside of the boring rod, and a distance adjusting assembly is arranged at the lower end of the first rotating shaft. The boring blade can rotate by an angle, the tip is replaced so as to continue to use the device for boring machine machining, the arrangement makes full use of the plurality of tips of the boring blade for machining, and the problem that the boring blade is likely to shake during boring due to the fact that the tip can be replaced is solved.)

1. A boring machine machining cutter with an adjustable cutter head comprises a boring rod (1) and is characterized in that the boring rod (1) is of a hollow structure, a first box body (2) and two second box bodies (3) are arranged at the top of the boring rod (1), the first box body (2) is fixedly installed at the center of the top of the boring rod (1), the first box body (2) is in an I shape, a first rotating shaft (21), a first gear (22), two first racks (23) and two locking assemblies (4) are arranged on the first box body (2), the first rotating shaft (21) is rotatably connected to the middle of the first box body (2), the first gear (22) is coaxially sleeved on the upper portion of the first rotating shaft (21), the lower end of the first rotating shaft (21) penetrates through the first box body (2) and extends to the inside of the boring rod (1), and a distance adjusting assembly (5) is arranged at the lower end of the first rotating shaft (21), one end of the distance adjusting component (5) transversely extends to the outer wall of the boring rod (1), a dial (6) is fixedly arranged on the outer wall of the boring rod (1) corresponding to the position of the distance adjusting component (5), two first racks (23) are slidably connected with the top of the boring rod (1), the two first racks (23) are respectively meshed with a first gear (22), one ends of the two first racks (23) are respectively fixedly connected with a second box body (3), a slide way for accommodating the movement of the first racks (23) is arranged on the inner side of the first box body (2), a boring cutter blade (7), a fixing block (24), a fixing component (8) and a pushing component (9) are arranged in the second box body (3), the fixing block (24) is fixedly arranged in the first box body (2), a first sliding groove (25) is arranged in the middle of the fixing block (24), a circular groove (26) is formed in one side, close to the first gear (22), of the first sliding groove (25), a second sliding groove (27) is formed in two opposite side walls of the second box body (3), the fixing component (8) is arranged in the first sliding groove (25) and the second sliding groove (27) in a sliding mode, the boring blade (7) is fixedly installed in the middle of the fixing component (8), the boring blade (7) is in sliding fit with the middle of the fixing block (24), the pushing component (9) is arranged in the first sliding groove (25) and the second sliding groove (27) in a sliding mode, a groove for accommodating the boring blade (7) is formed in one end, far away from the first rotating shaft (21), of the second box body (3), a groove for accommodating the boring blade (7) is formed in one end, far away from the first rotating shaft (21), two first sliding blocks (28) are further arranged in the first box body (2), and one ends of the two first sliding blocks (28) are connected with the second box body (3) through first springs (29) respectively, and the two first sliding blocks (28) are respectively in sliding fit with the first sliding grooves (25).

2. The cutter head adjustable boring machine machining tool according to claim 1, characterized in that two locking assemblies (4) are respectively arranged at both sides of the first box body (2), each locking assembly (4) comprises a transverse plate (41), a first screw rod (42) and two clamping blocks (43), the transverse plate (41) is fixedly arranged at two sides of the first box body (2), the first screw rod (42) penetrates through the transverse plate (41) and is rotationally connected with the transverse plate (41), the thread directions of the two ends of the first screw rod (42) are opposite, the two clamping blocks (43) are respectively connected with the two sides of the transverse plate (41) in a sliding way, and two the upper end of clamp splice (43) respectively with first screw rod (42) threaded connection, every a plurality of locking groove (44), two have all been seted up on second box body (3) the lower extreme of clamp splice (43) cooperates with a plurality of locking groove (44) joint respectively.

3. The boring machine tool with the adjustable tool bit of claim 1, wherein the distance adjusting assembly (5) comprises an adjusting rod (51), a first bevel gear (52) and a second bevel gear (53), the first bevel gear (52) is coaxially sleeved on the lower end of the first rotating shaft (21), the adjusting rod (51) penetrates through the outer wall of one side of the boring rod (1) and is rotatably connected with the boring rod (1) and the dial (6), the second bevel gear (53) is coaxially sleeved on one end of the adjusting rod (51), and the first bevel gear (52) is meshed with the second bevel gear (53).

4. The cutter-head-adjustable boring machine machining tool as claimed in claim 1, characterized in that the fixing assembly (8) comprises a second rotating shaft (81), two first blocks (82) and two second blocks (83), the two first blocks (82) are respectively fixedly installed on two sides of the boring blade (7), the two first blocks (82) are respectively in sliding fit with the first sliding grooves (25), the length of the diagonal line of the first blocks (82) is slightly smaller than the length of the diameter of the circular grooves (26), the two second blocks (83) are respectively fixedly installed on two sides of the first blocks (82), the second rotating shaft (81) penetrates through the boring blade (7), the two first blocks (82) and the two second blocks (83), and the second rotating shaft (81) is fixedly connected with the boring blade (7).

5. The boring machine machining tool with the adjustable tool bit as claimed in claim 1, wherein the pushing assembly (9) comprises a clamping bar (91), a blocking block (92), a cam (93), a second screw (94), a third sliding groove (95), a limiting plate (96) and a second sliding block (97), the second sliding block (97) is fixedly mounted on one side of the clamping bar (91), the second sliding block (97) is in sliding fit with the second sliding groove (27), an opening is formed at one end of the clamping bar (91) and is matched with the second block (83), the other end of the clamping bar (91) is of a hollow structure, the second screw (94) is in threaded connection with the inside of the other end of the clamping bar (91), the cam (93) is fixedly mounted at one end of the second screw (94), the blocking block (92) is arranged above the cam (93), and the blocking block (92) is in sliding fit with one end of the clamping bar (91), seted up third spout (95) on fixed block (24), spacing block (92) and third spout (95) sliding fit, just limiting plate (96) fixed mounting is in the one end of third spout (95), third spout (95) will spacing block (92) block through limiting plate (96), fourth spout (98) have been seted up to the both sides of spacing block (92), the port department of clamping bar (91) be provided with fourth spout (98) complex sliding block, the lower extreme of sliding block is provided with second spring (99).

6. The boring machine tool with the adjustable tool bit as claimed in claim 3, characterized in that one end of the adjusting rod (51) is provided with a scale needle, which is fitted with the dial (6).

7. The cutter for boring machine with adjustable cutter head according to claim 1, characterized in that the upper and lower ends of the second box body (3) are detachably connected.

Technical Field

The invention relates to the technical field of boring cutters, in particular to a boring machine machining cutter with an adjustable cutter head.

Background

The boring cutter is one kind of boring cutter, generally a round handle, and a square cutter rod is also used for a larger workpiece, and the most common occasions are inner hole processing, hole expanding, profiling and the like. Tools with one or two cutting parts, specially adapted for roughing, semi-finishing or finishing existing holes. The boring tool may be used on a boring machine, a lathe or a milling machine.

Chinese utility model patent publication No. CN214443164U discloses a device for conveniently replacing boring cutter bits and fixing boring blades, comprising a base, a protective cover, a mounting frame and a cutter changing assembly, wherein the upper part of the base is provided with the protective cover, the interior of the protective cover is provided with the mounting frame, the lower end of the mounting frame is provided with the cutter changing assembly, the cutter changing assembly comprises a cylinder, a clapboard, a push rod, a mounting block, a motor, a coupler, a rotating shaft, a lower fixing seat, a cutter magazine and an upper fixing seat, the upper part of the base is provided with the cylinder, the cylinder is connected with the push rod, the clapboard is arranged around the cylinder, the upper part of the push rod is provided with the mounting block, the motor is arranged on the upper side of the mounting block, the motor is connected with the coupler, the coupler is provided with a rotating shaft, the lower fixing seat is arranged on the upper side of the lower fixing seat, the upper fixing seat is arranged on the upper side of the cutter magazine, the design solves the problem that the time is consumed in replacing the original device for replacing boring cutter bits and fixing boring blades, the utility model discloses a rational in infrastructure, the quick sword of going up of being convenient for.

However, the above patent also has the following problems:

1. when the conventional boring machine machining cutter is used for a period of time, the cutter blade needs to be replaced integrally after being worn, so that the boring cutter blade is scrapped integrally only due to the wear of one corner, the purchasing cost of the boring cutter blade is increased, and the waste of resources is also caused;

2. the existing boring machine processing cutter needs to integrally disassemble the blade to adjust the distance when aiming at different processing apertures, thereby wasting time and labor, improving the labor cost and ensuring that the adjusting precision is not high.

Disclosure of Invention

The invention aims to provide a boring machine machining cutter with an adjustable cutter head, and aims to solve the technical problem in the prior art.

The invention provides a boring machine processing cutter with an adjustable cutter bit, which comprises a boring rod, wherein the boring rod is of a hollow structure, the top of the boring rod is provided with a first box body and two second box bodies, the first box body is fixedly arranged at the center of the top of the boring rod, the first box body is in an I shape, the first box body is provided with a first rotating shaft, a first gear, two first racks and two locking components, the first rotating shaft is rotatably connected to the middle part of the first box body, the first gear is coaxially sleeved on the upper part of the first rotating shaft, the lower end of the first rotating shaft penetrates through the first box body and extends to the inside of the boring rod, the lower end of the first rotating shaft is provided with a distance adjusting component, one end of the distance adjusting component transversely extends to the outer wall of the boring rod, and a dial is fixedly arranged on the outer wall of the boring rod corresponding to the position of the distance adjusting component, the two first racks are connected with the top of the boring rod in a sliding manner, the two first racks are respectively meshed with the first gear, one end of each of the two first racks is fixedly connected with a second box body, a slideway for accommodating the movement of the first racks is formed in the inner side of each first box body, a boring blade, a fixed block, a fixed assembly and a pushing assembly are arranged in each second box body, the fixed block is fixedly installed in the first box body, a first sliding groove is formed in the middle of the fixed block, a circular groove is formed in one side, close to the first gear, of each first sliding groove, second sliding grooves are formed in two opposite side walls of each second box body, the fixed assemblies are arranged in the first sliding grooves and the second sliding grooves in a sliding manner, the boring blade is fixedly installed in the middle of the fixed assemblies and is in sliding fit with the middle of the fixed blocks, and the pushing assembly is arranged in the first sliding grooves and the second sliding grooves in a sliding manner, the boring machine is characterized in that a groove for accommodating the boring blade is formed in one end, away from the first rotating shaft, of the second box body, two first sliding blocks are further arranged in the first box body, one ends of the first sliding blocks are connected with the second box body through first springs respectively, and the first sliding blocks are in sliding fit with the first sliding grooves respectively.

Further, two locking Assembly sets up respectively in the both sides of first box body, every locking Assembly all includes diaphragm, first screw rod and two clamp splices, diaphragm fixed mounting is in the both sides of first box body, first screw rod runs through the diaphragm and rotates with the diaphragm to be connected, just the screw thread opposite direction at first screw rod both ends, two the clamp splice is sliding connection respectively in the both sides of diaphragm, and two the upper end of clamp splice respectively with first screw rod threaded connection, every a plurality of locking groove has all been seted up on the second box body, two the lower extreme of clamp splice cooperates with a plurality of locking groove joint respectively.

Further, the distance adjusting assembly comprises an adjusting rod, a first bevel gear and a second bevel gear, the first bevel gear is coaxially sleeved at the lower end of the first rotating shaft, the adjusting rod penetrates through the outer wall of one side of the boring rod and is rotatably connected with the boring rod and the dial, the second bevel gear is coaxially sleeved at one end of the adjusting rod, and the first bevel gear is meshed with the second bevel gear.

Furthermore, the fixing assembly comprises a second rotating shaft, two first square blocks and two second square blocks, the two first square blocks are fixedly installed on two sides of the boring blade respectively, the two first square blocks are in sliding fit with the first sliding grooves respectively, the length of a diagonal line of each first square block is slightly smaller than the diameter of each circular groove, the two second square blocks are fixedly installed on two sides of the first square blocks respectively, the second rotating shaft penetrates through the boring blade, the two first square blocks and the two second square blocks, and the second rotating shaft is fixedly connected with the boring blade.

Further, the pushing assembly comprises a clamping rod, a blocking block, a cam, a second screw rod, a third sliding groove, a limiting plate and a second sliding block, the second sliding block is fixedly installed on one side of the clamping rod and is in sliding fit with the second sliding groove, an opening is formed in one end of the clamping rod, the shape of the opening is matched with that of the second square block, the other end of the clamping rod is of a hollow structure, the second screw rod is connected with the inside through threads, the cam is fixedly installed at one end of the second screw rod, the blocking block is arranged above the cam and is in sliding fit with one end of the clamping rod, the third sliding groove is formed in the fixing block, the blocking block is in sliding fit with the third sliding groove, the limiting plate is fixedly installed at one end of the third sliding groove, the third sliding groove is used for clamping the blocking block through the limiting plate, and fourth sliding grooves are formed in two sides of the blocking block, the port department of clamping bar is provided with the sliding block with fourth spout complex, the lower extreme of sliding block is provided with the second spring.

Furthermore, one end of the adjusting rod is provided with a scale needle, and the scale needle is matched with the dial.

Furthermore, the upper end and the lower end of the second box body are detachably connected.

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

(1) when discovering that a tip of boring blade is worn and torn, the accessible rotates the second pivot for boring blade turned angle, changes the tip so that follow-up continued this device of use carries out the boring machine processing, should set up a plurality of tips that have fully utilized boring blade and process, and among the prior art, boring blade is just scrapped after tip wearing and tearing once and is compared, and boring blade's utilization ratio is higher, has not only practiced thrift the cost of material, and the number of times that personnel maintained and changed also reduces by a wide margin, has further reduced the human cost.

(2) The clamping rod on the pushing assembly clamps the second block on the fixing assembly, so that the problem that the boring cutter can shake during boring due to the fact that the tip of the boring cutter can be replaced when the boring cutter is used for machining the boring machine is avoided, and the stability of the boring machine during machining is guaranteed due to the fact that the boring cutter is matched with the groove formed in the second box body.

(3) The two second box bodies are symmetrically arranged, so that the stability of the boring bar during the processing of the boring machine is ensured, compared with the boring bar in the prior art, the boring bar is provided with the boring blade at only one end, the boring blade is more wear-resistant, the bearing forces on the two sides of the boring bar are self-balanced, the boring bar is not vibrated, and the processing efficiency is higher.

(4) After the boring machine finishes machining, the boring blade also returns to the second box body for the pointed end of the boring blade can not expose, and when the device is not used, the pointed end of the boring blade can not be contacted by an external object to cause abrasion, so that the device is easy to place, workers can not be accidentally injured due to the fact that the pointed end of the boring blade is exposed outside, and the overall practicability of the device is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a perspective view of the present invention;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is a partial schematic view of the present invention;

FIG. 4 is a schematic view of a portion of the distance adjustment assembly;

FIG. 5 is a schematic view of a first partial structure of the second container;

FIG. 6 is a second partial structural view of the second box;

FIG. 7 is a partial schematic view of a retaining assembly;

fig. 8 is a partial structural schematic view of the pushing assembly.

Reference numerals:

1. boring a rod; 2. a first case; 3. a second box body; 4. a locking assembly; 5. a distance adjustment assembly; 6. a dial scale; 7. boring a blade; 8. a fixing assembly; 9. a pushing assembly; 21. a first rotating shaft; 22. a first gear; 23. a first rack; 24. a fixed block; 25. a first chute; 26. a circular groove; 27. a second chute; 28. a first slider; 29. a first spring; 41. a transverse plate; 42. a first screw; 43. a clamping block; 44. a locking groove; 51. adjusting a rod; 52. a first bevel gear; 53. a second bevel gear; 81. a second rotating shaft; 82. a first block; 83. a second block; 91. a clamping bar; 92. a barrier block; 93. a cam; 94. a second screw; 95. a third chute; 96. a limiting plate; 97. a second slider; 98. a fourth chute; 99. a second spring.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.

The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 8, an embodiment of the present invention provides a boring machine processing tool with an adjustable tool bit, including a boring bar 1, where the boring bar 1 is of a hollow structure, a first box 2 and two second boxes 3 are disposed on a top of the boring bar 1, the first box 2 is fixedly mounted at a top center of the boring bar 1, the first box 2 is in an i shape, the first box 2 is provided with a first rotating shaft 21, a first gear 22, two first racks 23 and two locking assemblies 4, the first rotating shaft 21 is rotatably connected to a middle portion of the first box 2, the first gear 22 is coaxially sleeved on an upper portion of the first rotating shaft 21, a lower end of the first rotating shaft 21 penetrates through the first box 2 and extends into the boring bar 1, a distance adjusting assembly 5 is disposed at a lower end of the first rotating shaft 21, one end of the distance adjusting assembly 5 extends transversely to an outer wall of the boring bar 1, a dial 6 is fixedly arranged on the outer wall of the boring bar 1 corresponding to the position of the distance adjusting component 5, two first racks 23 are connected with the top of the boring bar 1 in a sliding manner, the two first racks 23 are respectively meshed with a first gear 22, one ends of the two first racks 23 are respectively fixedly connected with a second box body 3, a slide way for accommodating the movement of the first racks 23 is arranged on the inner side of the first box body 2, a boring blade 7, a fixing block 24, a fixing component 8 and a pushing component 9 are arranged in the second box body 3, the fixing block 24 is fixedly arranged in the first box body 2, a first sliding groove 25 is arranged in the middle of the fixing block 24, a circular groove 26 is arranged on one side of the first sliding groove 25 close to the first gear 22, second sliding grooves 27 are arranged on two opposite side walls of the second box body 3, the fixing component 8 is arranged in the first sliding groove 25 and the second sliding groove 27 in a sliding manner, boring blade 7 fixed mounting be in fixed subassembly 8 middle part, just boring blade 7 and fixed block 24's middle part sliding fit, push assembly 9 slides and sets up in first spout 25 and second spout 27, the groove that holds boring blade 7 is seted up to the one end that first pivot 21 was kept away from to second box body 3, still be provided with two first sliders 28 in the first box body 2, two the one end of first slider 28 is connected with second box body 3 through first spring 29 respectively, and two first slider 28 respectively with first spout 25 sliding fit.

Specifically, two locking Assembly 4 sets up respectively in the both sides of first box body 2, every locking Assembly 4 all includes diaphragm 41, first screw rod 42 and two clamp splice 43, diaphragm 41 fixed mounting is in the both sides of first box body 2, first screw rod 42 runs through diaphragm 41 and rotates with diaphragm 41 and be connected, just the screw thread opposite direction at first screw rod 42 both ends, two clamp splice 43 sliding connection respectively in the both sides of diaphragm 41, and two the upper end of clamp splice 43 respectively with first screw rod 42 threaded connection, every a plurality of locking groove 44 has all been seted up on the second box body 3, two the lower extreme of clamp splice 43 cooperates with a plurality of locking groove 44 joint respectively. By rotating the first screw rod 42, the two clamping blocks 43 are driven to move relatively and clamped into the corresponding locking grooves 44, so that the second box body 3 is locked and kept in a stable state, and the processing effect is prevented from being influenced by instability of the second box body 3 during subsequent boring machine processing.

Specifically, the distance adjusting assembly 5 comprises an adjusting rod 51, a first bevel gear 52 and a second bevel gear 53, the first bevel gear 52 is coaxially sleeved at the lower end of the first rotating shaft 21, the adjusting rod 51 penetrates through the outer wall of one side of the boring bar 1 and is rotatably connected with the boring bar 1 and the dial 6, the second bevel gear 53 is coaxially sleeved at one end of the adjusting rod 51, and the first bevel gear 52 is meshed with the second bevel gear 53. Through rotating the adjusting rod 51 on the distance adjusting assembly 5, according to the required extending distance, the adjusting rod 51 is rotated by contrasting the dial 6, the adjusting rod 51 rotates to drive the second bevel gear 53 to rotate, and the second bevel gear 53 is meshed with the first bevel gear 52, so that the first rotating shaft 21 rotates to drive the first gear 22 to rotate, the two first racks 23 slide at the top end of the boring bar 1, and the two second box bodies 3 are driven to slide outwards to the required distance under the driving of the two first racks 23 respectively.

Specifically, the fixing assembly 8 includes a second rotating shaft 81, two first blocks 82 and two second blocks 83, the two first blocks 82 are respectively and fixedly installed on two sides of the boring blade 7, the two first blocks 82 are respectively in sliding fit with the first sliding grooves 25, the length of a diagonal line of the first blocks 82 is slightly smaller than the length of a diameter of the circular groove 26, the two second blocks 83 are respectively and fixedly installed on two sides of the first blocks 82, the second rotating shaft 81 penetrates through the boring blade 7, the two first blocks 82 and the two second blocks 83, and the second rotating shaft 81 is fixedly connected with the boring blade 7. When one point of the boring blade 7 is found to be worn, the point can be replaced by rotating the second rotating shaft 81 to rotate the boring blade 7, so that the boring blade 7 can be used for boring machine processing continuously, and the arrangement makes full use of a plurality of points of the boring blade 7 for processing.

Specifically, the pushing assembly 9 includes a clamping bar 91, a blocking block 92, a cam 93, a second screw 94, a third sliding groove 95, a limiting plate 96 and a second slider 97, the second slider 97 is fixedly mounted on one side of the clamping bar 91, the second slider 97 is in sliding fit with the second sliding groove 27, an opening is formed at one end of the clamping bar 91, the opening shape is matched with that of the second square block 83, the other end of the clamping bar 91 is of a hollow structure, the second screw 94 is in threaded connection with the inside of the clamping bar 91, the cam 93 is fixedly mounted at one end of the second screw 94, the blocking block 92 is arranged above the cam 93, the blocking block 92 is in sliding fit with one end of the clamping bar 91, the third sliding groove 95 is formed in the fixing block 24, the blocking block 92 is in sliding fit with the third sliding groove 95, the limiting plate 96 is fixedly mounted at one end of the third sliding groove 95, the third sliding groove 95 is used for clamping the blocking block 92 through the limiting plate 96, fourth spout 98 has been seted up to the both sides of blocking piece 92, the port department of clamping bar 91 is provided with the sliding block with fourth spout 98 complex, the lower extreme of sliding block is provided with second spring 99. The second screw 94 on the pushing assembly 9 is pulled to drive the clamping rod 91 to move forward, the clamping rod 91 is ensured to always keep horizontal sliding through the sliding fit of the second slide block 97 and the second sliding groove 27, the clamping rod 91 is enabled to abut against the second square 83, the fixing assembly 8 is enabled to move towards the port of the second box body 3 until the boring blade 7 abuts against the groove formed at one end of the second box body 3, then the second screw 94 is rotated to enable the cam 93 to move upwards to push the blocking block 92 upwards to enable the blocking block 92 to be clamped into the third sliding groove 95, and the limiting plate 96 is matched with the third sliding groove 95 to play a limiting role in limiting the blocking block 92, so that the stability of the blocking block 92 is ensured, the clamping rod 91 and the whole pushing assembly 9 are ensured to be in a locked state, the clamping rod 91 abuts against the second square 83 to be matched with the groove formed in the second box body 3, and the boring blade 7 is ensured to be in a stable state, the stability of the subsequent boring machine during processing is further ensured, and the overall practicability of the device is improved. After the boring machine finishes processing, the contact locking assembly 4 locks the second box body 3, the adjusting rod 51 is rotated reversely by the same working principle, the reference dial 6 returns to zero, the second box body 3 returns to the boring bar 1, at the moment, the second screw 94 is rotated again, the cam 93 is downward, the separation block 92 slides downward in the clamping rod 91 under the elastic force of the second spring 99, the arrangement of the second spring 99 can ensure that the separation block 92 can stably move downward when the cam 93 moves downward, the separation block is separated from the locking of the third sliding groove 95 and the limiting plate 96, the clamping rod 91 can slide, and then the second screw 94 is pulled to enable the clamping rod 91 to move backward.

Specifically, one end of the adjusting rod 51 is provided with a scale needle, which is matched with the dial 6. The adjusting distance can be conveniently observed by comparing the scale needle with the dial 6.

Specifically, the upper end and the lower end of the second box body 3 are detachably connected. When all sharp ends of the boring blade 7 need to be replaced after being worn, the second box body 3 can be quickly disassembled, and the boring blade 7 and the fixing component 8 are taken out, so that the boring blade 7 can be quickly replaced and installed, and the overall practicability of the device is improved.

The working principle is as follows: when the device is used, a worker firstly opens the locking component 4, then the adjusting rod 51 is rotated according to the required extension distance by rotating the adjusting rod 51 on the distance adjusting component 5, the adjusting rod 51 is rotated according to the required extension distance, the adjusting rod 51 rotates to drive the second bevel gear 53 to rotate, the first rotating shaft 21 is rotated through the engagement of the second bevel gear 53 and the first bevel gear 52, so as to drive the first gear 22 to rotate, the two first racks 23 slide at the top end of the boring bar 1, the two second box bodies 3 are driven to slide outwards to the required distance respectively under the drive of the two first racks 23, then the two second box bodies 3 are clamped by the locking component 4, the second box bodies 3 are prevented from loosening, the situation that the second box bodies 3 are always kept in a stable state when a subsequent boring machine is machined is ensured, the two second box bodies 3 are symmetrically arranged, and the stability of the boring bar 1 during the machining of the boring machine is ensured, compared with the prior art that only one end of the boring bar 1 is provided with the boring blade 7, the boring bar 1 has better stability and higher processing precision of boring holes, the second screw 94 on the pushing assembly 9 is pulled to drive the clamping bar 91 to move forwards, the clamping bar 91 can always keep horizontal sliding through the sliding fit of the second slide block 97 and the second slide groove 27, the clamping bar 91 is enabled to be abutted against the second square block 83, the fixing assembly 8 is enabled to move towards the port of the second box body 3 until the boring blade 7 is abutted against the groove formed at one end of the second box body 3, then the second screw 94 is rotated to enable the cam 93 to move upwards to push the blocking block 92 upwards to be clamped into the third slide groove 95, and the limiting plate 96 is matched with the third slide groove 95 to play a limiting role in limiting the blocking block 92 and ensure the stability of the blocking block 92, so as to ensure that the clamping bar 91 and the whole pushing assembly 9 are in a locking state, and the clamping rod 91 tightly supports the second square block 83 and is matched with a groove formed in the second box body 3, so that the boring blade 7 is in a stable state, the stability of subsequent boring machine processing is further ensured, and the overall practicability of the device is improved. After the boring machine finishes processing, the contact locking assembly 4 locks the second box body 3, the adjusting rod 51 is rotated reversely by the same working principle, the reference dial 6 is reset to zero, the second box body 3 is retracted into the boring bar 1, at the moment, the second screw 94 is rotated, the cam 93 is downward, the blocking block 92 slides downward in the clamping bar 91 and is separated from the locking of the third chute 95 and the limiting plate 96, the clamping bar 91 can slide, then the second screw 94 is pulled to move the clamping bar 91 backward, at the moment, the first slide block 28 pushes the first block 82 backward through the elasticity of the first spring 29, the first block 82 falls into the circular groove 26 at the rear side of the first chute 25, the boring blade 7 is also retracted into the second box body 3, so that the tip of the boring blade 7 is not exposed, and when the device is not used, the tip of the boring blade 7 is not contacted by an external object to cause abrasion, the device is easy to place, workers cannot be accidentally injured due to the fact that the tip end of the boring blade 7 is exposed outside, and the overall practicability of the device is improved. And when discovering the most advanced wearing and tearing of boring blade 7, the accessible rotates second pivot 81 for boring blade 7 turned angle, change most advanced so that follow-up this device of continuous use carries out the boring machine processing, should set up a plurality of most advanced of having fully utilized boring blade 7 and process, with prior art, boring blade 7 just will scrap after most advanced wearing and tearing once and compare, boring blade 7's utilization ratio is higher, not only practiced thrift the cost of material, personnel's maintenance change number of times also reduces by a wide margin, the human cost has further been reduced, make this device more practical.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.