CN209216421U - Geometric Tolerance Demonstration Device - Google Patents

Abstract

The utility model discloses a form and position tolerance demonstration device, which comprises a bottom plate, and linear guide rails parallel to each other are respectively arranged on both sides of the bottom plate; An auxiliary workbench is provided between them, and an auxiliary moving mechanism is provided between the two first sliders; a vertical guide rail is provided on the auxiliary workbench, and an auxiliary table seat that slides with it is provided on the vertical guide rail. A universal angle ruler and a lever dial indicator are provided, and an auxiliary drive mechanism is provided on the auxiliary workbench; second sliders are respectively provided on the two linear guide rails, and measuring gauge mechanisms are respectively provided on the two second sliders; Measuring meter mechanism includes a table frame, on which a dial indicator is installed; a main shaft support seat is provided on the bottom plate, and a main shaft is arranged inside the main shaft support seat. The axis of the main shaft is parallel to the linear guide rail. The jaw chuck and the other end are provided with a driving mechanism; the lower part of the three-jaw chuck is provided with vise.

Description

Geometric Tolerance Demonstration Device

technical field

The utility model belongs to the technical field of teaching appliances, in particular to a form and position tolerance demonstration device.

Background technique

Teaching aids are indispensable equipment used to explain something during teaching. Teaching aids, teachers and students, and knowledge points are connected in new ways to form a relationship between people and things, and between things and things. Good teaching aids play a very important role as a demonstration instrument for students to learn a certain knowledge point or a certain subject.

"Interchangeability and Technical Measurement" is an important technical basic course for mechanical majors, which is used to train students to understand the interchangeability of geometric parameters. However, the definition of geometric tolerance in the course of "Interchangeability and Technical Measurement" is easy to confuse. Students often cannot fully understand the meaning of the drawing, and cannot imagine the specific shape of the part, so it is difficult to receive good teaching results. However, the existing geometric tolerance teaching aids only have "tolerance matching display cabinets", that is, for each geometric tolerance, put corresponding parts in the display cabinet, and then paste the patterns of various geometric tolerances on the display cabinet. . But this can only show the principles of various geometric tolerance items, and cannot show the actual impact of various geometric tolerances and the differences and connections between various geometric tolerances. Moreover, the "tolerance fit showcase" is bulky and can only be placed in the laboratory. It is inconvenient for teachers to use it in classroom teaching, and it lacks practicability in classroom.

The Chinese patent with the publication number CN203787003U discloses a form and position tolerance demonstration teaching aid, including a supporting part, a shaft moving mechanism, a display shaft, a jumping disk, a lighting mechanism and a motor, and the shaft moving mechanism is placed on the shell slide of the supporting part. On the road, the upper end of the display shaft is a tapered surface, which can be inserted into the shaft fixing sleeve of the shaft moving mechanism to realize positioning and clamping; the roller of the lighting mechanism is placed on the slideway of the jumping disc, and the lighting mechanism Below the shaft moving mechanism, the motor is fixed in the base and connected with the jumping disk through the Torx clamp coupling. Although the geometrical tolerance demonstration teaching aid can demonstrate the fit of shafts with different geometrical errors and standard holes to a certain extent, it cannot demonstrate other geometrical tolerances, and there are major functional defects.

Contents of the invention

In view of this, the purpose of this utility model is to provide a geometric tolerance demonstration device, which can demonstrate the structure and principle of all geometric tolerances, and has the advantages of simple structure and small volume.

In order to achieve the above object, the utility model provides the following technical solutions:

A form and position tolerance demonstration device, comprising a bottom plate, the two sides of the bottom plate are respectively provided with linear guide rails parallel to each other;

The two linear guide rails are respectively provided with first sliders which are slidably matched with them, an auxiliary workbench is provided between the two first sliders, and an auxiliary workbench is provided between the two first sliders. An auxiliary moving mechanism that drives the auxiliary workbench to move between the two first sliders; the auxiliary workbench is provided with a vertical guide rail, and the vertical guide rail is provided with an auxiliary table seat slidingly matched with it , the auxiliary table base is provided with a universal angle ruler and a lever dial indicator, and the auxiliary workbench is also provided with an auxiliary drive mechanism for driving the auxiliary table base to move along the vertical guide rail;

The two linear guide rails are respectively provided with second sliders which are slidably matched thereto, and the two second sliders are respectively provided with measuring meter mechanisms; the measuring meter mechanisms include A meter frame for adjusting the position in two directions, on which a dial indicator is installed;

The base plate is provided with a main shaft supporting seat, and the main shaft supporting seat is provided with a main shaft which rotates with it, the axis of the main shaft is parallel to the linear guide rail, and the end of the main shaft facing the auxiliary worktable is provided with three claw The other end of the chuck is provided with a driving mechanism for driving the rotation of the main shaft;

A flat-nose pliers is arranged below the three-jaw chuck.

Further, the auxiliary moving mechanism includes a screw rod arranged between the two first sliders, the bottom of the auxiliary workbench is provided with an auxiliary base screwed with the screw rod, and the screw rod One end features a handle.

Further, a guide rod parallel to the screw rod is provided between the two first sliders, and the auxiliary base is slidingly fitted with the guide rod.

Further, a height-adjustable support seat is provided under the bottom plate.

Further, the auxiliary drive mechanism includes auxiliary pulleys arranged at the upper and lower ends of the vertical guide rail, an auxiliary belt is arranged between the two auxiliary pulleys, and the auxiliary belt is fixedly connected to the auxiliary watch base.

Further, a waist-shaped circle whose length direction is parallel to the vertical guide rail is provided between the auxiliary workbench and the rotating shaft of one of the auxiliary pulleys, and the rotating shaft of the auxiliary pulley is installed on the waist-shaped circle. Inside, and the auxiliary workbench is provided with an adjusting bolt threadedly engaged with the rotating shaft of the auxiliary pulley, the axis of the adjusting bolt is parallel to the vertical guide rail; on the rotating shaft of the other auxiliary pulley There is an auxiliary handle for driving its rotation.

Further, the watch frame includes a watch base fixedly installed on the second slider, the watch base is provided with a vertical watch rod, and the vertical watch rod is provided with a sliding sleeve slidingly matched with it, so The sliding sleeve is provided with a perforation which is set at a certain angle between the axis and the vertical stem, and the inner sleeve of the perforation is provided with an inclined stem which slides with it, and one end of the inclined stem is fixedly fitted with a mounting sleeve , the dial gauge is mounted on the mounting sleeve.

Further, the sliding sleeve is provided with a first locking screw for locking it with the vertical gauge rod and the inclined gauge rod; the mounting sleeve is provided with a locking screw for locking the installation position of the dial gauge. Second locking screw.

Further, the watch base is provided with a second self-locking screw for locking the position of the second slider; the first slider is provided with a first self-locking screw for locking its position.

Further, the driving mechanism includes a motor, and a belt transmission mechanism is provided between the motor and the main shaft.

The beneficial effects of the utility model are:

The shape and position tolerance demonstration device of the utility model is provided with a three-grip chuck for clamping a cylindrical workpiece to be measured, and a flat-nose pliers for clamping a non-circular workpiece; with two mutually parallel linear guide rails, and The first slider and the second slider are respectively set on the two linear guide rails. The universal angle ruler installed on the first slider can demonstrate the measurement of taper, the lever dial indicator can demonstrate the measurement of verticality, and the combination of two dial indicators can demonstrate Measuring coaxiality, roundness, circular runout, flatness and parallelism, etc., that is, the form and position tolerance demonstration device of the present utility model can demonstrate the structure and principle of all form and position tolerances, and has the advantages of simple structure, small volume and convenient operation And demonstrate the advantages of being intuitive.

Demonstration by using the geometric tolerance demonstration device of the present utility model has the following advantages:

Composite—concentrate definition and measurement methods on one demonstration device to achieve multiple functions;

Intuitiveness - explore the commonality of various fit tolerances, integrate and simplify measurement methods, and provide teaching information for students to understand the interchangeability of parts;

Practical - As a teaching tool, it can also be used for practical teaching such as course experiments and open experiments, allowing students to operate, measure and use.

Description of drawings

In order to make the purpose, technical solutions and beneficial effects of the utility model clearer, the utility model provides the following drawings for illustration:

Fig. 1 is a structural schematic diagram of an embodiment of a geometric tolerance demonstration device of the present invention;

Fig. 2 is the top view of Fig. 1;

Fig. 3 is a right side view of Fig. 1 .

Explanation of reference signs:

1-bottom plate; 2-linear guide rail; 3-first slider; 4-auxiliary workbench; 5-vertical guide rail; Two sliders; 10- dial indicator; 11- spindle support seat; 12- spindle; 13- three-jaw chuck; 14- vise; 15- screw; 16- auxiliary base; 17- handle; 18- guide ;19-auxiliary pulley; 20-auxiliary belt; 21-auxiliary handle; 22-table base; 23-vertical stem; 24-sliding sleeve; Tightening screw; 28-second locking screw; 29-motor; 30-belt transmission mechanism; 31-second self-locking screw; 32-second self-locking device; 33-support seat.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the utility model and implement it, but the examples given are not intended to limit the utility model.

As shown in FIG. 1 , it is a structural schematic diagram of an embodiment of the geometric tolerance demonstration device of the present invention. The shape and position tolerance demonstration device of this embodiment includes a bottom plate 1, and linear guide rails 2 parallel to each other are respectively provided on both sides of the bottom plate 1. In this embodiment, height-adjustable supporting bases 33 are provided under the base plate 1 , and the supporting bases 33 are respectively located at the four corners of the base plate 1 for adjusting the supporting height of the base plate 1 .

The two linear guide rails 2 are respectively provided with a first slide block 3 which is slidably matched with it, an auxiliary workbench 4 is provided between the two first slide blocks 3, and an auxiliary table 4 is provided between the two first slide blocks 3 for driving An auxiliary moving mechanism for the auxiliary workbench 4 to move between the two first sliders 3 . The auxiliary moving mechanism of the present embodiment includes a screw rod 15 arranged between the two first sliders 3, the bottom of the auxiliary table 4 is provided with an auxiliary base 16 threadedly fitted with the screw rod 15, and one end of the screw rod 15 is provided with There are handles 17 . A first self-locking device for locking the screw rod 15 and preventing it from rotating is provided between the screw rod 15 and the first slider 3 . In this embodiment, a guide rod 18 parallel to the screw rod 15 is arranged between the two first sliders 3 , and the auxiliary base 16 is slidingly matched with the guide rod 18 . The guide rods 18 in this embodiment are set as two parallel to each other. A first self-locking screw for locking its position may also be arranged on the first slider 3 .

The auxiliary workbench 4 of the present embodiment is provided with a vertical guide rail 5, and the vertical guide rail 5 is provided with an auxiliary table seat 6 slidingly matched with it, and the auxiliary table seat 6 is provided with a universal angle ruler 7 and a lever dial indicator 8, And the auxiliary table 4 is also provided with an auxiliary driving mechanism for driving the auxiliary table base 6 to move along the vertical guide rail 5 . The auxiliary driving mechanism of the present embodiment includes auxiliary pulleys 19 arranged on the upper and lower ends of the vertical guide rail 5 , an auxiliary belt 20 is arranged between the two auxiliary pulleys 19 , and the auxiliary belt 20 is fixedly connected with the auxiliary table base 6 . A waist-shaped circle whose length direction is parallel to the vertical guide rail 5 is provided between the auxiliary workbench 4 and the rotating shaft of one of the auxiliary pulleys 19. The rotating shaft of the auxiliary pulley 19 is installed in the waist-shaped circle, and on the auxiliary workbench 4 An adjusting bolt threadedly matched with the rotating shaft of the auxiliary pulley 19 is provided. The axis of the adjusting bolt is parallel to the vertical guide rail 5. By rotating the adjusting bolt, the position of the rotating shaft of the auxiliary pulley 19 can be adjusted, thereby realizing tensioning of the auxiliary main pulley. The technical purpose of the belt 20; the rotating shaft of another auxiliary pulley 19 is provided with an auxiliary handle 21 for driving its rotation. Certainly, as required, a self-locking screw can also be arranged between the auxiliary table base 6 and the auxiliary workbench 4, and will not be repeated here.

The two linear guide rails 2 are respectively provided with a second slider 9 for sliding cooperation with it, and the two second sliders 9 are respectively provided with a measuring table mechanism; The table frame of position, is installed with dial indicator 10 on the table frame. The table frame of the present embodiment includes a table base 22 fixedly installed on the second slider 9, the table base 22 is provided with a vertical table rod 23, and the vertical table rod 23 is provided with a sliding sleeve 24 slidingly matched with it. The sleeve 24 is provided with a perforation with a certain angle between the axis and the vertical table rod 23. The perforation is equipped with an inclined table rod 25 that slides and fits with it. Table 10 is installed on the mounting sleeve 26. In this way, the dial indicator 10 can quickly adjust its position in two directions perpendicular to the linear guide rail 2, so as to realize the technical purpose of quickly adjusting and positioning the position of the dial indicator 10 . The sliding sleeve 24 of the present embodiment is provided with the first locking screw 27 for locking it with the vertical table rod 23 and the inclined table rod 25; The locking screw 28 plays a locking role. The watch base 22 of this embodiment is provided with a second self-locking screw 31 for locking the position of the second slider 9 .

The bottom plate 1 of this embodiment is provided with a main shaft support seat 11, and a main shaft 12 is arranged in the main shaft support seat 11 to rotate with it. The other end of the chuck 13 is provided with a driving mechanism for driving the main shaft 12 to rotate. The driving mechanism in this embodiment includes a motor 29 , and a belt transmission mechanism 30 is provided between the motor 29 and the main shaft 12 . The motor 29 of this embodiment is a stepless motor, which can display the geometric error fluctuation of the part at the high speed stage, while the low speed stage can intuitively reflect the maximum and minimum limit values of the error and the geometric tolerance of a specific position.

A vise 14 is provided below the three-jaw chuck 13 . The flat nose pliers 14 of this embodiment is provided with a second self-locking device 32 .

In the form and position tolerance demonstration device of this embodiment, a three-grip chuck is used to clamp a cylindrical workpiece to be measured, and a flat-nose pliers is used to clamp a non-circular workpiece; by setting two parallel linear guide rails, and The first slider and the second slider are respectively set on the two linear guide rails. The universal angle ruler installed on the first slider can demonstrate the measurement of taper, the lever dial indicator can demonstrate the measurement of verticality, and the combination of two dial indicators can demonstrate Measuring coaxiality, roundness, circular runout, flatness and parallelism, etc., that is, the form and position tolerance demonstration device of the present utility model can demonstrate the structure and principle of all form and position tolerances, and has the advantages of simple structure, small volume and convenient operation And demonstrate the advantages of being intuitive.

Using the geometric tolerance demonstration device of this embodiment for demonstration has the following advantages:

Composite—concentrate definition and measurement methods on one demonstration device to achieve multiple functions;

Intuitiveness - explore the commonality of various fit tolerances, integrate and simplify measurement methods, and provide teaching information for students to understand the interchangeability of parts;

Practical - As a teaching tool, it can also be used for practical teaching such as course experiments and open experiments, allowing students to operate, measure and use.

The above-mentioned embodiments are only preferred embodiments for fully illustrating the utility model, and the protection scope of the utility model is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present utility model are all within the protection scope of the present utility model. The scope of protection of the utility model shall be determined by the claims.

Claims (10)

1. A form and position tolerance demonstration device is characterized in that: it comprises a base plate (1), and both sides of the base plate (1) are respectively provided with mutually parallel linear guide rails (2); The two linear guide rails (2) are respectively provided with first sliders (3) which are slidably matched with them, and an auxiliary workbench (4) is arranged between the two first sliders (3), and the two An auxiliary moving mechanism for driving the auxiliary workbench (4) to move between the two first sliders (3) is provided between the two first sliders (3); the auxiliary workbench ( 4) A vertical guide rail (5) is provided on the vertical guide rail (5), and an auxiliary table seat (6) slidingly matched with it is provided on the vertical guide rail (5), and a universal angle ruler (7) is provided on the auxiliary table seat (6). ) and a lever dial indicator (8), and the auxiliary workbench (4) is also provided with an auxiliary drive mechanism for driving the auxiliary table seat (6) to move along the vertical guide rail (5); The two linear guides (2) are respectively provided with a second slide block (9) slidingly matched with it, and the two second slide blocks (9) are respectively provided with a measuring table mechanism; the measuring table mechanism includes A meter frame that can be adjusted in two directions perpendicular to the linear guide rail (2), and a dial gauge (10) is installed on the meter frame; The base plate (1) is provided with a main shaft support seat (11), and the main shaft support seat (11) is provided with a main shaft (12) which rotates with it, and the axis of the main shaft (12) is in line with the linear guide rail ( 2) Parallel, one end of the main shaft (12) facing the auxiliary workbench (4) is provided with a three-jaw chuck (13), and the other end is provided with a driving mechanism for driving the main shaft (12) to rotate; A vise (14) is provided below the three-jaw chuck (13). 2. The form and position tolerance demonstration device according to claim 1, characterized in that: the auxiliary moving mechanism comprises a screw (15) arranged between the two first sliders (3), and the auxiliary The bottom of the workbench (4) is provided with an auxiliary base (16) threadedly engaged with the screw rod (15), and one end of the screw rod (15) is provided with a handle (17). 3. The geometric tolerance demonstration device according to claim 2, characterized in that: a guide rod (18) parallel to the screw rod (15) is arranged between the two first sliders (3), The auxiliary base (16) is slidingly matched with the guide rod (18). 4. The form and position tolerance demonstration device according to claim 1, characterized in that: a height-adjustable support base (33) is provided under the bottom plate (1). 5. The geometric tolerance demonstration device according to claim 1, characterized in that: the auxiliary drive mechanism includes auxiliary pulleys (19) arranged at the upper and lower ends of the vertical guide rail (5), two of the auxiliary pulleys An auxiliary belt (20) is arranged between the pulleys (19), and the auxiliary belt (20) is fixedly connected with the auxiliary watch seat (6). 6. The form and position tolerance demonstration device according to claim 5, characterized in that: between the auxiliary table (4) and the rotating shaft of one of the auxiliary pulleys (19), there is a longitudinal direction and the vertical axis. The straight guide rail (5) is parallel to the waist circle, the rotating shaft of the auxiliary pulley (19) is installed in the waist circle, and the auxiliary workbench (4) is provided with the auxiliary pulley (19) the adjusting bolt that the rotating shaft thread fits, and the axis of described adjusting bolt is parallel with described vertical guide rail (5); The rotating shaft of another described auxiliary pulley (19) is provided with the auxiliary handle that is used to drive its rotation (twenty one). 7. The geometric tolerance demonstration device according to claim 1, characterized in that: the meter frame includes a meter seat (22) fixedly installed on the second slider (9), and the meter seat (22 ) is provided with a vertical table rod (23), and the vertical table rod (23) is provided with a sliding sleeve (24) that slides with it, and the sliding sleeve (24) is provided with an axis and the vertical The watch rod (23) is a perforation set at a certain angle, and the inside of the perforation is provided with an inclined watch rod (25) slidingly matched with it, and one end of the inclined watch rod (25) is fixedly set with a mounting sleeve (26) , the dial indicator (10) is installed on the installation sleeve (26). 8. The form and position tolerance demonstration device according to claim 7, characterized in that: said sliding sleeve (24) is provided with a locking device for locking it with said vertical gauge rod (23) and said inclined gauge rod (25). ) of the first locking screw (27); the mounting sleeve (26) is provided with a second locking screw (28) for locking the installation position of the dial gauge (10). 9. The form and position tolerance demonstration device according to claim 7, characterized in that: the table seat (22) is provided with a second self-locking screw (31) for locking the position of the second slider (9) ; The first slider (3) is provided with a first self-locking screw for locking its position. 10. The geometric tolerance demonstration device according to claim 1, characterized in that: the driving mechanism comprises a motor (29), and a belt transmission mechanism ( 30).