Fine adjustment boring cutter

Abstract

The utility model provides a fine adjustment boring cutter. Comprising a cutter body, a cutter holder, a counter bore, an adjusting disc, a screw and an adjusting sleeve, a through hole is formed in the cutter body, the cutter holder is partially arranged in the through hole of the cutter body and does not rotate relative to the cutter body, and the counter bore is formed in the end, located on the side of the through hole, of the cutter holder; the counter bore comprises an outer screw hole close to the end face and an inner screw hole located in the bottom of the outer screw hole and coaxial with the outer screw hole. The adjusting disc is arranged on the side, away from the tool holder, of the through hole. One end of the screw is connected with the adjusting disc and rotates synchronously with the adjusting disc, and the other end of the screw is located in the inner screw hole and is in threaded connection with the inner screw hole; the adjusting sleeve is sleeved between the screw and the tool holder, the inner ring of the adjusting sleeve is in threaded connection with the screw, and the outer ring of the adjusting sleeve is in threaded connection with the outer screw hole. According to the utility model, the adjusting sleeve is designed, and the cutter holder and the screw move relatively by rotating the adjusting sleeve, so that a reverse gap is eliminated, and the boring precision is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical processing technical field especially a kind of fine adjustment boring cutter. BACKGROUND

[0002] For fine adjustment boring cutter, there is a dial on the head of fine adjustment boring cutter, rotate screw by dial, move tool holder forward and backward after screw rotation, realize tool adjustment. Dial moves 0.5mm every rotation, there are 50 small grids on dial, can realize 0.01mm fine adjustment, improve machining precision, reduce fine adjustment time, improve work efficiency, but fine adjustment boring cutter will appear reverse clearance after using for a period of time, affect boring accuracy. Therefore, it is necessary to provide a kind of fine adjustment boring cutter to overcome the defects in the above. SUMMARY

[0003] The utility model aims at providing a kind of fine adjustment boring cutter.

[0004] According to the utility model provides a kind of fine adjustment boring cutter, including: tool body, the through hole is formed in the tool body inside;Tool holder, the tool holder is partially located in the through hole of the tool body and does not occur relative rotation with tool body;Counterbore, the counterbore is located on the end of the tool holder on the side of through hole, and the counterbore includes the outer screw hole close to the end face and the inner screw hole located at the bottom of the outer screw hole and coaxially arranged with the outer screw hole;Adjusting disc, the adjusting disc is located on the side of the through hole away from tool holder;Screw rod, one end of the screw rod is connected with the adjusting disc and rotates synchronously with the adjusting disc, and the other end of the screw rod is located in the inner screw hole and is threadedly connected with the inner screw hole;Adjusting sleeve, the adjusting sleeve is sleeved between the screw rod and the tool holder, the inner ring of the adjusting sleeve is threadedly connected with the screw rod, and the outer ring of the adjusting sleeve is threadedly connected with the outer screw hole.

[0005] Preferably, the through hole includes an adjacent square hole section and a round hole section, and the tool holder is arranged in the square hole section.

[0006] Preferably, the tool body is provided with a first through hole in the square hole section, and an adjustable first screw is arranged on the first through hole.

[0007] Preferably, the adjusting disc is arranged in the round hole section, a recessed portion is arranged at the center of the adjusting disc, and a scale portion is arranged on the circumference of the adjusting disc.

[0008] Preferably, a cylindrical portion is arranged on the side of the adjusting disc close to the tool holder, the screw rod is fixed in the cylindrical portion by a spring pin, a first fixing seat is arranged in the round hole section, a second fixing seat is sleeved on the screw rod, a first bearing is arranged between the outer ring of the cylindrical portion and one side of the first fixing seat, and a second bearing is arranged between the other side of the first fixing seat and the second fixing seat.

[0009] Preferably, the cutter body is provided with a second through hole at the round hole section, the first fixing seat outer ring is provided with a locking hole, and a second screw is arranged on the second through hole and the locking hole.

[0010] Preferably, the adjusting sleeve comprises a sleeve part threadedly connected with the outer screw hole, a nut part arranged at the tail end of the sleeve part and threadedly connected with the screw rod, and a plurality of operation holes uniformly distributed on the circumference of the nut part.

[0011] Preferably, the cutter body is provided with a third through hole at a position corresponding to the nut part, and a third screw is arranged on the third through hole.

[0012] Preferably, the pitch of the screw rod is not equal to the pitch of the adjusting sleeve outer ring.

[0013] Preferably, the pitch of the screw rod is smaller than the pitch of the adjusting sleeve outer ring.

[0014] Compared with the prior art, the fine adjustment boring cutter has the following beneficial effects: the adjusting sleeve is designed, the cutter holder and the screw rod are caused to move relatively by rotating the adjusting sleeve, the reverse gap is eliminated, and the boring precision is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0015] The utility model will be explained further in detail below by combining with the drawings and specific embodiments:

[0016] Figure 1 It is the structure schematic view of fine adjustment boring cutter in the utility model;

[0017] Figure 2 It is the sectional view schematic view of fine adjustment boring cutter in the utility model;

[0018] Figure 3 It is the sectional view schematic view and the local enlarged view before reverse gap adjustment of fine adjustment boring cutter in the utility model;

[0019] Figure 4 It is the sectional view schematic view and the local enlarged view after reverse gap adjustment of fine adjustment boring cutter in the utility model;

[0020] Figure 5 It is the structure schematic view of screw rod and adjusting disc (A place local enlarged view) in the utility model; Figure 2

[0021] Figure 6 It is the structure schematic view of adjusting sleeve in the utility model.

[0022] EXPLANATION OF REFERENCE NUMERALS:

[0023] ​1, knife body; 11, through hole; 111, square hole section; 112, round hole section; 113, first through hole; 114, first screw; 115, second through hole; 116, second screw; 117, third through hole; 118, third screw;

[0024] 2, knife holder; 21, reverse gap;

[0025] 3, counterbore; 31, outer screw hole; 32, inner screw hole;

[0026] 4, adjusting disc; 41, recessed part; 42, scale part; 43, cylindrical part;

[0027] 5, screw rod; 51, spring pin; 52, first fixing seat; 521, locking hole; 53, second fixing seat; 54, clamping spring; 55, first bearing; 56, second bearing;

[0028] 6, adjusting sleeve; 61, sleeve part; 62, nut part; 63, operation hole. DETAILED DESCRIPTION

[0029] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, without creative labor, other drawings can also be obtained according to these drawings.

[0030] In order to make the drawing simple, only the part related to the present application is shown in each drawing, which does not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, the same structure or function of the components in some drawings is only schematically shown or only one of them is marked. In this paper, "one" not only means "only one", but also means "more than one".

[0031] It should be further understood that the term "and / or" used in the present application and the appended claims means one or more of the associated listed terms in any combination and all possible combinations, and includes these combinations.

[0032] In this paper, it should be noted that unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] In addition, in the description of the present application, the terms "first", "second", etc. are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, specific implementation manners of the present application will be described below with reference to the drawings. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor, and other embodiments can also be obtained.

[0035] Referring to Figures 1 to 5 The embodiment discloses a fine adjustment boring tool, which comprises a tool body 1, a tool holder 2, a counterbore 3, an adjusting disc 4, a screw rod 5 and an adjusting sleeve 6.

[0036] Referring to Figure 2 A through hole 11 is formed in the tool body 1, the tool holder 2 is partially arranged in the through hole 11 of the tool body 1 and does not rotate relative to the tool body 1, the counterbore 3 is arranged on the end of the tool holder 2 located on the side of the through hole 11, the counterbore 3 comprises an outer screw hole 31 located close to the end face and an inner screw hole 32 located at the bottom of the outer screw hole 31 and coaxially arranged with the outer screw hole 31. The adjusting disc 4 is arranged on the side of the through hole 11 away from the tool holder 2, one end of the screw rod 5 is connected with the adjusting disc 4 and rotates synchronously with the adjusting disc 4, the other end of the screw rod 5 is located in the inner screw hole 32 and is threadedly connected with the inner screw hole 32, the adjusting sleeve 6 is sleeved between the screw rod 5 and the tool holder 2, the inner ring of the adjusting sleeve 6 is threadedly connected with the screw rod 5, and the outer ring of the adjusting sleeve 6 is threadedly connected with the outer screw hole 31. When it is necessary to adjust the size of the tool, the screw rod 5 is rotated by rotating the adjusting disc 4, and the tool holder 2 moves forward and backward after the screw rod 5 rotates, so that the tool adjustment is realized.

[0037] Referring to Figures 3 to 4 After the fine adjustment boring tool is used for a period of time, the thread structure is worn, and a reverse gap 21 will appear between the screw rod 5 and the tool holder 2, which will affect the boring accuracy. When the tool holder 2 has the reverse gap 21, the tool holder 2 is moved away from the adjusting disc 4 (i.e. the side where the reverse gap 21 is located) relative to the screw rod 5 by rotating the adjusting sleeve 6, so as to transfer the reverse gap 21 to the other side of the thread groove. At this time, the gap between the tool holder 2 and the adjusting sleeve 6 relative to the screw rod 5 is located in the opposite direction of the thread groove of the screw rod 5, and there is no reverse gap 21 and forward gap, so that the elimination of the reverse gap 21 is realized.

[0038] Referring to Figure 2, the through hole 11 includes a square hole section 111 and a round hole section 112 arranged adjacent to each other, the tool holder 2 is arranged in the square hole section 111, so that the tool holder 2 does not rotate relative to the tool body 1. For those skilled in the art, the square hole end can also be designed to be connected with the round hole section 112 in the form of a key groove, so as to achieve the effect that the tool holder 2 does not rotate relative to the tool body 1.

[0039] Referring to the accompanying drawings Figure 3 , the adjusting disc 4 is arranged in the round hole section 112 and can move relative to the tool body 1. The adjusting disc 4 is provided with a recess portion 41 at the center position, which can be a one-letter slot, a cross-shaped slot or an internal hexagonal slot. By means of a corresponding tool, such as a screwdriver or a wrench, the rotation of the adjusting disc 4 is realized, thereby driving the screw rod 5 to rotate. The angle of rotation of the adjusting disc 4 is recorded on the scale portion 42 arranged in the circumferential direction of the adjusting disc 4. Among them, the screw rod 5 adopts M8x0.5 thread, the tool holder 2 moves 0.5mm for each rotation of the adjusting disc 4, and the scale portion 42 is marked with 50 small boxes, and the tool moves 0.01mm for each rotation of a box.

[0040] Referring to the accompanying drawings Figure 4 , the adjusting disc 4 is provided with a cylindrical portion 43 on the side close to the tool holder 2, the screw rod 5 is fixed in the cylindrical portion 43 through a spring pin 51, the round hole section 112 is provided with a first fixing seat 52, the screw rod 5 is provided with a second fixing seat 53, the outer ring of the cylindrical portion 43 and one side of the first fixing seat 52 are provided with a first bearing 55, and the other side of the first fixing seat 52 and the second fixing seat 53 are provided with a second bearing 56. The rotation connection between the screw rod 5 and the tool body 1 is realized through the first bearing 55 and the second bearing 56.

[0041] More specifically, the tool body 1 is provided with a second through hole 115 in the round hole section 112, the outer ring of the first fixing seat 52 is provided with a locking hole 521, a second screw 116 is arranged on the second through hole 115 and the locking hole 521, the first fixing seat 52 is fixed through the second screw 116, and the second fixing seat 53 is fixed and limited through a clamping spring 54 arranged on the screw rod 5.

[0042] Referring to the accompanying drawings Figure 2 , the tool body 1 is provided with a first through hole 113 in the square hole section 111, and an adjustable first screw 114 is arranged on the first through hole 113, so as to extrude the outer wall of the tool holder 2 and realize the locking of the tool holder 2.

[0043] Referring to the accompanying drawings Figure 5The adjusting sleeve 6 comprises a sleeve part 61 screwed with the outer screw hole 31, a nut part 62 arranged at the tail end of the sleeve part 61 and screwed with the screw rod 5, and a plurality of operation holes 63 uniformly distributed on the circumference of the nut part 62. The third through hole 117 corresponding to the nut part 62 is arranged on the cutter body 1, and the third screw 118 is arranged on the third through hole 117. The third through hole 117 should be larger than the operation hole 63, and the tool can be inserted into the operation hole 63 through the third through hole 117. When the third screw 118 is removed, the user can rotate the adjusting sleeve 6 outside the cutter body 1 to adjust the reverse gap 21. Generally, the reverse gap 21 is small, and only a small angle is needed to be rotated

[0044] Specifically, the screw pitch of the screw rod 5 is smaller than the screw pitch of the adjusting sleeve 6. The screw rod 5 adopts M8x0.5 thread, and the adjusting sleeve 6 adopts M14x1.5 thread. Due to the different screw pitches of the adjusting sleeve 6 and the screw rod 5, the relative movement between the adjusting sleeve 6 and the screw rod 5 is generated when rotating, and the reverse gap 21 is eliminated.

[0045] It is obvious for those skilled in the art that various modifications and variations can be made to the above exemplary embodiments of the utility model without departing from the spirit and scope of the utility model. Therefore, it is intended to cover the modifications and variations of the utility model falling within the scope of the appended claims and their equivalent technical solutions.

Claims

1. A micro-boring tool, characterized in that, The utility model provides a kind of adjustable cutter, including: The cutter body is formed with a through hole inside; The cutter holder is partially arranged in the through hole of the cutter body and does not rotate relative to the cutter body; A counterbore is arranged on the end of the cutter holder located on the side of the through hole, and the counterbore includes an outer screw hole located near the end face and an inner screw hole located at the bottom of the outer screw hole and coaxially arranged with the outer screw hole; An adjusting disc is arranged on the side of the through hole away from the cutter holder; A screw rod is connected to the adjusting disc at one end and rotates synchronously with the adjusting disc, and the other end of the screw rod is located in the inner screw hole and is threadedly connected with the inner screw hole; An adjusting sleeve is sleeved between the screw rod and the cutter holder, and the inner ring of the adjusting sleeve is threadedly connected with the screw rod, and the outer ring of the adjusting sleeve is threadedly connected with the outer screw hole.

2. The micro-boring cutter of claim 1, wherein, The through hole includes an adjacent square hole section and a circular hole section, and the cutter holder is arranged in the square hole section.

3. The micro-boring cutter of claim 2, wherein, The cutter body is provided with a first through hole in the square hole section, and an adjustable first screw is arranged on the first through hole.

4. The micro-boring cutter of claim 2, wherein, The adjusting disc is arranged in the circular hole section, and a recessed portion is arranged at the center of the adjusting disc, and a scale portion is arranged circumferentially on the adjusting disc.

5. The micro-boring cutter of claim 4, wherein, A cylindrical portion is arranged on the side of the adjusting disc close to the cutter holder, the screw rod is fixed in the cylindrical portion by a spring pin, a first fixing seat is arranged in the circular hole section, a second fixing seat is sleeved on the screw rod, a first bearing is arranged between the outer ring of the cylindrical portion and one side of the first fixing seat, and a second bearing is arranged between the other side of the first fixing seat and the second fixing seat.

6. The micro-boring cutter of claim 5, wherein, The cutter body is provided with a second through hole in the circular hole section, a locking hole is formed in the outer ring of the first fixing seat, and a second screw is arranged on the second through hole and the locking hole.

7. The micro-boring cutter of claim 1 wherein, The adjusting sleeve includes a sleeve portion threadedly connected with the outer screw hole, a nut portion arranged at the tail end of the sleeve portion and threadedly connected with the screw rod, and a plurality of operation holes uniformly distributed circumferentially on the nut portion.

8. The micro-boring cutter of claim 7, wherein, A third through hole is arranged on the cutter body corresponding to the nut portion, and a third screw is arranged on the third through hole.

9. The micro-boring cutter of claim 1 wherein, The pitch of the screw rod is not equal to the pitch of the outer ring of the adjusting sleeve.

10. The micro-boring cutter of claim 9, wherein, The pitch of the screw rod is smaller than the pitch of the outer ring of the adjusting sleeve.

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