阅读说明：本技术 一种凸轮靠模曲线手工精准绘图规 (Manual accurate drawing gauge for cam profiling curve ) 是由 陈天杰 袁嫣红 李正军 汪永成 于 2021-09-17 设计创作，主要内容包括：本发明公开了一种凸轮靠模曲线手工精准绘图规,包括凸轮、竖直方向置于凸轮中心的限位件,垂直于所述限位件方向设有滑杆,滑杆的一侧穿过限位件并连接有绕模定位件,另一侧与限位件衔接处设有弹簧一,使得绕模定位件在旋转过程中始终贴合凸轮,所述滑杆的远端连接有竖直布置的画笔,画笔随滑杆同步运动作出靠模曲线。本发明适用于凸轮件用车、铣、磨加工用靠模的快速手工绘制,可极大地缩短技术人员对凸轮加工靠模设计的周期；设置弹簧一将放置画笔一侧的滑杆向另一侧拉,进而通过压杆带动滚动轴承始终紧贴凸轮,以精准画出靠模曲线,同时通过调整滑杆一侧穿过压紧手柄的长度,用以画出靠模曲线的不同尺寸。(The invention discloses a manual accurate drawing gauge for cam profiling curves, which comprises a cam, a limiting piece arranged at the center of the cam in the vertical direction, and a sliding rod arranged in the direction perpendicular to the limiting piece, wherein one side of the sliding rod penetrates through the limiting piece and is connected with a coiling positioning piece, a first spring is arranged at the joint of the other side of the sliding rod and the limiting piece, so that the coiling positioning piece is always attached to the cam in the rotating process, the far end of the sliding rod is connected with a vertically arranged painting brush, and the painting brush synchronously moves along with the sliding rod to make a profiling curve. The method is suitable for the rapid manual drawing of the cam for turning, milling and grinding the cam piece, and can greatly shorten the design period of a technician for the cam processing cam; the sliding rod which is provided with the first spring and used for placing one side of the painting brush is pulled to the other side, and then the rolling bearing is driven by the pressing rod to be always tightly attached to the cam, so that a profiling curve can be accurately drawn, and meanwhile, the length of the pressing handle is penetrated through one side of the adjusting sliding rod, and different sizes of the profiling curve can be drawn.)

1. The utility model provides a manual accurate drawing rule of cam profiling curve which characterized in that: the drawing pen is characterized in that a limiting part and a perpendicular to are arranged at the center of the cam (5) in the cam (5) and in the vertical direction, a sliding rod (2) is arranged in the limiting part direction, one side of the sliding rod (2) penetrates through the limiting part and is connected with a winding positioning part, a first spring (3) is arranged at the joint of the other side and the limiting part, so that the winding positioning part is always attached to the cam (5) in the rotating process, the far end of the sliding rod is connected with a vertically arranged drawing pen (1), and the drawing pen (1) makes a profiling curve along with the synchronous movement of the sliding rod (2).

2. The manual precision drawing gauge of the cam profile curve according to claim 1, characterized in that: the limiting part comprises a pressing handle (9), a square hole (6) is formed in the middle of the pressing handle (9) and used for the sliding rod (2) to penetrate through, the bottom of the pressing handle is pivoted with a positioning part, and the positioning part is fixedly positioned with the cam.

3. The manual precision drawing gauge of the cam profile curve according to claim 2, characterized in that: the positioning component comprises a supporting block (172), the bottom of the supporting block (172) is connected with a positioning head (7) matched with the central hole of the cam (5), the bottom of the positioning head (7) is conical to adapt to the cams (5) with different hole diameters, the size of the positioning head (7) is smaller than that of the pressing handle (9), a second spring (8) is arranged between the bottom of the pressing handle (9) and the cam (5), and the second spring (8) wraps the positioning head (7).

4. The manual precision drawing gauge of the cam profile curve according to claim 2, characterized in that: the positioning part comprises an anti-skidding ground mat (171) with the size larger than that of the cam (5), the bottom of the cam (5) is arranged on the anti-skidding ground mat (171), the top of the anti-skidding ground mat (171) is connected with a positioning column (173), the top of the positioning column (173) is connected with a supporting block (172), and two ends of the anti-skidding ground mat penetrate through a center hole of the cam (5), wherein the positioning column (173) is divided into two parts, and a first column (18) and a second column (19) are movably connected.

5. The manual precision drawing gauge of the cam profile curve according to claim 4, characterized in that: the lateral surface of the second column (19) is circumferentially provided with a limit abutting block (20), the outer end of the abutting block (20) is arc-shaped, the middle position of the inner side end is connected with a transverse moving rod (21), a spring III (22) is arranged in the corresponding inner part of the positioning column (173), and the transverse moving rod (21) partially extends into the positioning column (173) and is connected with the spring III (22).

6. The manual precision drawing gauge of the cam profile curve according to claim 4, characterized in that: the lower part of the first column (18) is provided with an external thread (23), the upper part of the second column (19) is provided with a sunken groove (24), and the inner wall of the sunken groove (24) is provided with a thread groove (25) so as to realize the threaded connection of the first column (18) and the second column (19) and adjust the vertical distance between the first column (18) and the second column (19).

7. The manual precision drawing gauge of the cam profile curve according to claim 1, characterized in that: the winding positioning piece comprises a pressing rod (4), the bottom end of the pressing rod (4) is connected with a rolling bearing (10), the pressing rod (4) is fixedly arranged on the sliding rod (2), and the rolling bearing (10) is attached to the peripheral wall of the cam (5).

8. The manual precision drawing gauge of the cam profile curve according to claim 2, characterized in that: the adjusting device is characterized by further comprising an adjusting piece (15), the adjusting piece (15) is a plug pin (151) and a blocking piece (152), the blocking piece (152) is sleeved on the sliding rod (2) and abuts against the outer side of the spring I (3), a plurality of opening pin holes (16) are formed in the sliding rod (2) at intervals in the transverse direction, the plug pin (151) is inserted into one opening pin hole (16) and abuts against the blocking piece (152), and therefore the length of the pressing handle (9) is adjusted to penetrate through one side of the sliding rod (2).

9. The manual precision drawing gauge of the cam profile curve according to claim 1, characterized in that: the drawing pen is characterized in that a hole groove (11) is vertically formed in the end portion of the sliding rod (2), a threaded hole (12) is horizontally formed outwards, the threaded hole (12) is communicated with the hole groove (11), and the drawing pen (1) is arranged in the hole groove and fixed through a fastening screw (14) in a penetrating mode from the threaded hole in one side.

Technical Field

The invention relates to a manual accurate drawing gauge for a cam profiling curve.

Background

Drawing tools commonly used for geometric drawing have straightedges, squares, scales, compasses, protractors, curve plates, polygonal templates, and the like. The drawing method of parabola and ellipse learned in the mathematics lessons of junior high school generally draws a rectangular coordinate system, then typically finds several points in the coordinate system and roughly draws the points manually, and actually the relatively accurate manual drawing method still needs to be realized by means of a special drawing gauge. Although computers are widely used at present and are convenient to draw by CAD, for special curves, corresponding curve equations can not be found, and corresponding drawing software is not simple in actual work as imaginable.

Because the cam profiling curve graph is troublesome to draw, the profiling curve is composed of a plurality of sections of curves, the curve equation is difficult to list, the curve can be drawn by hand only by drawing the curve point by point, and then all the points are connected by smooth curves. Thus, the work load for drawing the relief map is large, and it is difficult to accurately draw the relief map.

In order to solve the problems, the scheme is developed accordingly.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a manual accurate drawing gauge for a cam profiling curve, which solves the problems in the background art.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a manual accurate drawing rule of cam profiling curve, includes that cam, vertical direction arrange the locating part at cam center in, the perpendicular to the locating part direction is equipped with the slide bar, and one side of slide bar is passed the locating part and is connected with around the mould setting element, and the opposite side links up the department with the locating part and is equipped with spring one for the cam is laminated all the time at rotatory in-process around the mould setting element, the distal end of slide bar is connected with the vertical painting brush of arranging, and the profiling curve is made along with slide bar synchronous motion to the painting brush.

Preferably, the limiting part comprises a pressing handle, a square hole is formed in the middle of the pressing handle and used for the sliding rod to penetrate through, the bottom of the pressing handle is pivoted with the positioning part, and the positioning part is fixedly positioned with the cam.

Preferably, the positioning part comprises a supporting block, the bottom of the supporting block is connected with a positioning head matched with the central hole position of the cam, the bottom of the positioning head is conical to adapt to cams with different hole diameters, the size of the positioning head is smaller than that of the pressing handle, a second spring is arranged between the bottom of the pressing handle and the cam, and the second spring surrounds the positioning head.

Preferably, the positioning part comprises an anti-skidding ground mat with the size larger than that of the cam, the bottom of the cam is arranged on the protection ground mat, the top of the anti-skidding ground mat is connected with a positioning column, the top of the positioning column is connected with a supporting block, two ends of the positioning column penetrate through a central hole of the cam, the positioning column is divided into two parts, and a first column and a second column are movably connected.

Preferably, the two side faces of the column are circumferentially provided with abutting blocks for limiting, the outer ends of the abutting blocks are arc-shaped, the middle position of the inner side end is connected with a transverse moving rod, a spring III is arranged in the corresponding inner part of the positioning column, and the part of the transverse moving rod extends into the positioning column and is connected with the spring III.

Preferably, the lower part of the first column is provided with external threads, the upper part of the second column is provided with a sunken groove, and the inner wall of the sunken groove is provided with a thread groove, so that the first column and the second column are in threaded connection to adjust the vertical distance between the first column and the second column.

Preferably, the winding positioning piece comprises a pressing rod, the bottom end of the pressing rod is connected with a rolling bearing, the pressing rod is fixedly arranged on the sliding rod, and the rolling bearing is attached to the peripheral wall of the cam.

Preferably, the adjusting device further comprises an adjusting piece, the adjusting piece is a bolt and a blocking piece, the blocking piece is sleeved on the sliding rod and abuts against the outer side of the first spring, a plurality of split pin holes are formed in the sliding rod at intervals in the transverse direction, and the bolt is inserted into one split pin hole and abuts against the blocking piece so as to adjust the length of one side of the sliding rod penetrating through the pressing handle.

Preferably, a hole groove is vertically formed in the end portion of the sliding rod, a threaded hole is horizontally formed outwards, the threaded hole is communicated with the hole groove, and the painting brush is arranged in the hole groove and is fixed through a fastening screw in a penetrating mode from the threaded hole in one side.

(III) advantageous effects

After adopting the technical scheme, compared with the prior art, the invention has the following advantages:

1. the manual accurate drawing gauge for the cam explorator curve is suitable for quickly and manually drawing explorators for turning, milling and grinding the cam piece, and can greatly shorten the design period of technicians for the cam processing explorators; the sliding rod which is provided with the first spring and used for placing one side of the painting brush is pulled to the other side, and then the rolling bearing is driven by the pressing rod to be always tightly attached to the cam, so that a profiling curve can be accurately drawn, and meanwhile, the length of the pressing handle is penetrated through one side of the adjusting sliding rod, and different sizes of the profiling curve can be drawn.

2. The manual accurate drawing gauge for the cam profiling curve is simple in structure and convenient to use, the whole drawing gauge is accurately fixed on the cam by improving the positioning part, the cam is firmly attached to the drawing sheet, drawing accuracy is not high due to slight looseness in the drawing process, and meanwhile the manual accurate drawing gauge is suitable for cams of different sizes to perform accurate drawing.

Drawings

FIG. 1 is a schematic diagram of the design of the present invention;

FIG. 2 is a schematic view of an embodiment of the present invention;

FIG. 3 is a cross-sectional elevation view of an embodiment of the present invention;

FIG. 4 is a disassembled view of the positioning component in the second embodiment of the present invention;

FIG. 5 is a schematic top view of a second embodiment of the present invention with a positioning member disassembled;

FIG. 6 is a top sectional view of the positioning post according to the second embodiment of the present invention;

fig. 7 is a schematic view of a further improvement of the positioning member in the second embodiment of the present invention.

In the figure: the painting brush comprises a painting brush 1, a sliding rod 2, a spring I3, a pressure rod 4, a cam 5, a square hole 6, a positioning head 7, a spring II 8, a pressing handle 9, a rolling bearing 10, a hole groove 11, a threaded hole 12, a clamping liner 13, a fastening screw 14, an adjusting piece 15, a plug 151, a blocking piece 152, a pin hole 16, a positioning part 17, an anti-skidding ground mat 171, a supporting block 172, a positioning column 173, a first column 18, a second column 19, a butting block 20, a transverse moving rod 21, a spring III 22, an external thread 23, a sunken groove 24 and a threaded groove 25.

Detailed Description

The invention is explained in more detail below with reference to the figures and examples.

As shown in fig. 1-3: the utility model provides a manual accurate drawing rule of cam profiling curve, includes cam 5, vertical direction and arranges the handle 9 and the locating head 7 that compress tightly at cam 5 center in, and the perpendicular to compresses tightly the handle direction and is equipped with slide bar 2, and one side of slide bar 2 is passed and is compressed tightly handle 9 and be connected with depression bar 4, and antifriction bearing 10 is connected to depression bar 4's bottom, and the opposite side is equipped with spring 3 with compressing tightly handle 9 linking department for antifriction bearing 10 laminates cam 5 all the time at rotatory in-process. The far end of the sliding rod 2 is connected with a vertically arranged painting brush 1, and the painting brush 1 moves synchronously with the sliding rod 2 to make a profiling curve.

Specifically, the first spring 3 pulls the sliding rod 2 on one side of the painting brush 1 towards the other side, and then the pressing rod 4 drives the rolling bearing 10 to be always attached to the cam 5, so that a profiling curve is accurately drawn.

The supporting end of the first spring 3 is realized through a blocking piece 152, the blocking piece is sleeved on the sliding rod and abuts against the outer side of the first spring, a plurality of open pin holes 16 are formed in the sliding rod at intervals in the transverse direction, the plug pin 151 is inserted into one of the open pin holes 16 and abuts against the blocking piece 152, so that the length of one side of the sliding rod 2 penetrating through the pressing handle is adjusted, and different sizes of profiling curves are drawn.

The applicant has devised the following drawing gauge.

The design principle of the drawing gauge (see fig. 1) is that a line segment AB ═ a' B ═ a "B". the.

Working principle of the drawing gauge (as shown in fig. 2): before drawing, the distance between the painting brush and the roller (namely the amplification degree of the explorator) is adjusted and determined, the handle 9 is vertically pressed downwards by the left hand (the downward pressing is matched with the spring II 8) to enable the cam 5 to be tightly attached to the painting paper, the part, close to the pen point, of the painting brush 1 is held by the right hand to do circular motion around the center, and the track of the pen point is formed into an explorator curve by the sliding rod 2 under the limitation of the pressing rod 4 and the roller 10. Thereby realizing the function of drawing a special curve by the tool.

The drawing gauge has the characteristics that:

1. the positioning head 7 is designed as a cone in the figure, and the function of the cone is to adapt to the central positioning of the cams 5 with different sizes and apertures.

2. The sliding rod 2 is in sliding fit with the square hole of the piece pressing handle 9, and the rolling bearing 10 can be always attached to the cam 5 under the action of the spring I3.

3. The adjusting member 15 can change the distance from the pen point to the roller 10 (namely, change the amplification degree of the master form), and when the amplification degree of the master form is increased, the sliding rod 2 with the corresponding size can be accessed on the side of the pressing handle 9.

4. The clamping position of the painting brush 1 is transversely fixed by a clamping gasket 13 (used for being tightly attached to the painting brush 1 and preventing looseness) and a fastening screw 14 (screwed into a threaded hole), so that the sliding rod 2 can be kept in a horizontal state during painting.

5. The slide rod 2 is provided with a plurality of split pin holes 16 for cams of different sizes.

The tool is suitable for quickly and manually drawing the cam for cam part turning and milling and grinding, and can greatly shorten the period of designing the cam processing explorator by technicians.

Example two

In the first embodiment, the cam 5 is positioned by pressing downwards, the rotating pressing handle 9 is easy to loose relative to the cam 5 to influence drawing, and the problem that the cam 5 slips relative to drawing paper is caused (for example, when the conventional compasses are used for drawing, a centrum with a sharp center is not a small circle on the drawing paper but deviates outwards when the drawing is finished), so that the drawing is not accurate.

In the embodiment, the spring II 8 and the positioning head 7 of the cone are improved into the positioning part to overcome the problems, and the rest structures are the same as the first embodiment.

Referring to fig. 5, the positioning member 17 includes an anti-slip pad 171 which is sized larger than the cam 5, and the bottom of the cam 5 is seated on the anti-slip pad 171 to prevent the relatively smooth cam 5 from contacting the drawing sheet, thereby increasing friction to prevent the sliding. The top of the positioning column is connected with a supporting block 172, the bottom of the positioning column is connected with an anti-skid ground mat 171, and two ends of the positioning column penetrate through the central hole of the cam 5. For the convenience of installation, the positioning column 173 is divided into two parts, and the first column 18 and the second column 19 are movably inserted (by connecting blocks and connecting grooves respectively arranged at the corresponding inner sides) for fixing.

Referring to fig. 6, two sides of the column are circumferentially provided with a limit abutting block 20 (in the drawing, three abutting blocks 20 with equal angles are adjacent to each other as an example), the outer end of the abutting block 20 is arc-shaped and can be better attached to the inner wall of the central hole of the cam 5, and the middle position of the inner side end is connected with a transverse moving rod 21. The specific implementation is as follows: the traversing rod gives an outward thrust to the abutment block 20, so that a spring three 22 can be arranged in the corresponding interior of the positioning post 173, into which the traversing rod 21 extends partially and is connected to the spring three 22. The advantage of providing spring three 22 is that it can be adapted to different cam center hole sizes, and is more convenient to use.

Further improvement, because the cam height of equidimension also is different, and the reference column if adopt same size then easily in the use because the relative deviation appears in the circumference atress, consequently this embodiment reforms into reference column 173 upper and lower interval regulation type, and then realizes the rigidity with supporting shoe and anti-skidding ground mat 171 centre gripping cam.

Referring to fig. 7, the first column and the second column are arranged to have a radial dimension difference and are realized in a threaded connection mode. The lower part of the first column 18 is provided with an external thread 23, the upper part of the second column is provided with a sunken groove 24, and the inner wall of the sunken groove is provided with a thread groove 25, so that the first column 18 and the second column 19 are in threaded connection to adjust the vertical distance between the first column and the second column.

Considering that threaded connection is easy to loosen, the lateral surfaces of the first column and the second column are provided with the transverse moving rod 21, the spring and the abutting block 21, so that the central hole position of the cam 5 can be abutted, and the rotation problem of the first column and the second column caused by small acting force is prevented.

The problem of size adaptation of the rolling bearing 10 and the cam 5 needs to be further considered, and particularly when the size of the rolling bearing is larger than that of the cam, the radian of the turning part of the cam is difficult to be highlighted, so that drawing is not accurate enough. Therefore, the rolling bearing 10 is relatively small in size, and the detail of the bending part of the drawn curve is clearer.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and the protection scope must be determined by the scope of the claims.