CN114674195A

CN114674195A - Automobile shifting fork position degree detection tool and detection method

Info

Publication number: CN114674195A
Application number: CN202210355833.4A
Authority: CN
Inventors: 史东丽; 高建国; 张宸柯; 邵宗辉; 许张楠; 朱宇
Original assignee: Changzhou Vocational Institute of Mechatronic Technology
Current assignee: Changzhou Vocational Institute of Mechatronic Technology
Priority date: 2022-04-06
Filing date: 2022-04-06
Publication date: 2022-06-28

Abstract

The invention provides an automobile shifting fork position degree detection tool and a detection method, and belongs to the field of detection tools. The problem of current detection machine's equipment price high and the testing process is relatively more loaded down with trivial details, must be operated by professional in the laboratory is solved. It includes shift fork head positioning mechanism, quick hold-down mechanism, fork portion waist type hole position degree detection mechanism and fork portion position degree detection mechanism, all mechanisms all set up on the bottom plate, shift fork head positioning mechanism and fork portion position degree detection mechanism arrange respectively in the left and right sides of bottom plate, quick hold-down mechanism and fork portion waist type hole position degree detection mechanism set up between shift fork head positioning mechanism and fork portion position degree detection mechanism, shift fork head positioning mechanism location shift fork part head, quick hold-down mechanism compresses tightly the shift fork part, two detection mechanism detect the waist type hole position degree and the fork portion position degree of shift fork part respectively. The invention improves the detection efficiency and controls the quality.

Description

Automobile shifting fork position degree detection tool and detection method

Technical Field

The invention belongs to the technical field of position degree detection tools, and particularly relates to an automobile shifting fork position degree detection tool and a detection method.

Background

The shifting fork is a main part in a gear shifting mechanism of the gearbox and mainly used for transmitting torque to enable the transmission to obtain gear shifting power. The quality requirement of shift fork is higher, and wherein three position degree are main detection items, and position degree tolerance requires very high, and shift fork production is very big in batches moreover, and this also brings very big degree of difficulty for detection efficiency.

At present, the position degree detection is generally carried out by manually operating three coordinates one by one. The three-coordinate device detects the position degree, although accurate, but the equipment price is expensive, detects the procedure more loaded down with trivial details, detects the cycle length, still needs professional to operate, has increased the cycle and the cost that the shift fork detected under the condition that shift fork part has big batch demand, manpower resources relative shortage.

Disclosure of Invention

In view of the above, the invention provides an automobile shifting fork position degree detection tool and a detection method, and solves the problems that the existing detection machine is high in equipment price, relatively complex in detection process and required to be operated by professional personnel in a detection room.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

an automobile shifting fork position degree gauge comprises a shifting fork head positioning mechanism, a rapid pressing mechanism, a fork waist-shaped hole position degree detection mechanism and a fork position degree detection mechanism, all of which are arranged on a bottom plate, the shifting fork head positioning mechanism and the fork position degree detection mechanism are respectively arranged at the left side and the right side of the bottom plate, the rapid pressing mechanism and the fork waist-shaped hole position degree detection mechanism are arranged between the shifting fork head positioning mechanism and the fork position degree detection mechanism, the shifting fork head positioning mechanism positions the head of the shifting fork part, the rapid pressing mechanism presses the handle part of the shifting fork part, the fork part waist-shaped hole position degree detection mechanism detects the length direction position degree and the width direction position degree of the waist-shaped hole of the shifting fork part, the fork part position degree detection mechanism detects the position degree of the distance between the two waist-shaped holes of the fork part of the shifting fork part.

Furthermore, the shifting fork head positioning mechanism comprises a square head circular arc bolt, a positioning table, a lower cover plate, tensioning steel balls and an upper cover plate, the upper cover plate and the lower cover plate are sequentially arranged above the positioning table, a plurality of tensioning steel balls are arranged between the upper cover plate and the lower cover plate, the contact surfaces of the upper cover plate, the lower cover plate and the tensioning steel balls are conical surfaces, all the tensioning steel balls are connected in series through elastic rubber bands, through holes are formed in the centers of the positioning table, the upper cover plate and the lower cover plate, a threaded hole is formed in the tail of the square head circular arc bolt, the square head circular arc bolt sequentially penetrates through the bottom plate, the positioning table and the upper cover plate to be in threaded connection with a screw penetrating through the lower cover plate, a reference A1 and a reference A2 are arranged on the positioning table, the head of the shifting fork part is sleeved on the peripheries of the upper cover plate and the lower cover plate during detection, the bottom surface of the head of the shifting fork part is arranged on the two references, the lower cover plate is pressed through the tightening screw, the lower cover plate extrudes the tensioning steel balls, the tensioning steel balls move outwards and contact with the inner surface of the central large hole of the head of the shifting fork part, and the head of the shifting fork is positioned.

Furthermore, the fork waist-shaped hole position degree detection mechanism comprises a U-shaped support, a measuring seat, a first dial indicator, a movable conical shaft, a second dial indicator, a base and a positioning guide cone, wherein the U-shaped support is installed at the rear part of the large boss, the measuring seat is arranged on the upper surface of the large boss, a hexagonal bolt penetrates through the U-shaped hole of the U-shaped support and is in threaded connection with the rear end of the measuring seat, two hexagonal nuts are respectively matched with two sides of the U-shaped support on the hexagonal bolt, a waist-shaped hole is formed in the measuring seat, a hexagonal polished rod penetrates through the waist-shaped hole of the measuring seat and is fixed on the large boss, the front end of the measuring seat extends out of the front end edge of the large boss and is arranged to drive the measuring seat to move back and forth by rotating the hexagonal bolt;

the front part of the measuring seat is fixedly provided with a guide cylinder, the movable conical shaft penetrates through the guide cylinder and the measuring seat to be arranged, a gauge seat of a first dial indicator is fixed on the left side surface of the large boss, a gauge seat of a second dial indicator is fixed on the right side surface of the large boss, measuring heads of the first dial indicator and the second dial indicator penetrate through the guide cylinder to be in surface contact with the movable conical shaft, the left side surface and the right side surface of the front part of the measuring seat are symmetrically provided with two small hexagonal bolts, each small hexagonal bolt is sleeved with a spring, one end of each spring is fixed on each small hexagonal bolt, and the free end of each spring abuts against the movable conical shaft penetrating through the guide cylinder;

the base is arranged on the bottom plate, a positioning guide cone is arranged at the center of the base, a datum A3 is arranged on the base, during detection, a shifting fork of the shifting fork part is arranged on the datum A3, the positioning guide cone penetrates through a waist-shaped hole below a fork part of the shifting fork part, and the movable cone shaft is matched with the waist-shaped hole above the fork part of the shifting fork part.

Further, fork position degree detection mechanism includes the guide rail, measures the frame down, goes up measuring rack, shell, L type slider, third and ejector pin, the guide rail sets up on the bottom plate, L type slider slides and sets up on the guide rail, the ejector pin passes the vertical part setting of L type slider, ejector pin and last measuring rack fixed connection, go up measuring rack and measuring rack symmetrical arrangement down, and go up and be equipped with the spring between measuring rack and the lower measuring rack, be equipped with a measuring rack gauge head respectively at the upper end of last measuring rack and the lower extreme of measuring rack down, the top at L type slider is installed to third of percentile table, and the gauge head of third percentile table passes L type slider and supports the surface at the ejector pin, and during the detection, L type slider slides on the guide rail and makes the side head of two measuring racks support the fork position at the shift fork part.

Furthermore, a limiting block for limiting the movement displacement of the L-shaped sliding block is arranged at the right end of the guide rail, and a shell for protecting the upper measuring frame and the lower measuring frame is fixedly arranged on the L-shaped sliding block.

Furthermore, the datum A1, the datum A2 and the datum A3 are all small cylindrical structures, and the datum A1 and the datum A2 are arranged at intervals of 180 degrees, and the three datums are determined according to the requirements of the drawing.

Furthermore, the quick pressing mechanism is installed on the small boss, and the small boss and the large boss are both fixed on the base plate.

Furthermore, the quick pressing mechanism is a vertical manual clamp.

Furthermore, four supporting legs are uniformly arranged at the bottom of the bottom plate.

A method for detecting the position degree of a shifting fork by an automobile shifting fork position degree detection tool specifically comprises the following steps:

step one, setting a zero position of a position degree gauge:

placing the left end head part of the standard sample of the automobile shifting fork part on a datum A1 and a datum A2 of a positioning table, placing a waist-shaped hole below a right fork part on a datum A3 on a base in a fork waist-shaped hole position degree detection mechanism, simultaneously enabling the lower waist-shaped hole to penetrate through a positioning guide cone to automatically center, then manually operating a quick pressing mechanism, pulling a handle to press a shifting fork handle part, screwing a screw, enabling a gap between an upper cover plate and a lower cover plate to be smaller and smaller under the action of the screw, simultaneously extruding all tensioning steel balls to move outwards along contact conical surfaces of the upper cover plate, the lower cover plate and the steel balls, moving outwards along with the tensioning steel balls until all the tensioning steel balls are in contact with an inner hole surface of a central large hole in the left end head part of the standard sample of the automobile shifting fork part, and automatically centering the shifting fork until tensioning, wherein the left end head part of the standard sample of the automobile shifting fork part is positioned;

operating the fork part waist-shaped hole position degree detection mechanism, moving the measuring seat back and forth to enable the movable conical shaft to be right above the upper waist-shaped hole of the fork part at the right end of the shifting fork, fixing the measuring seat, moving the movable conical shaft downwards to enable the head of the movable conical shaft to fall into the upper waist-shaped hole of the fork part at the right end of the shifting fork, fixing the movable conical shaft through a left hexagonal bolt and a right hexagonal bolt on the measuring seat, adjusting the position of the measuring seat to be a zero position, adjusting a first dial indicator and a second dial indicator to return to zero at the same time, and completing the setting of the zero positions of a position degree requirement 1 and a position degree requirement 2;

operating the fork part position degree detection mechanism, manually moving the sliding block to the left along the guide rail, manually pressing the upper and lower measuring frames simultaneously to enable the distance between the two measuring frames to be smaller than the distance between the two waist-shaped holes, extending the measuring frames into the position between the two fork parts at the right end of the shifting fork, slightly loosening the two measuring frames to enable the two measuring heads to be tightly attached to the upper and lower fork parts, wherein the position of the measuring frame is a zero position, simultaneously adjusting the third percentile to zero, and completing the setting of the zero position required by the position degree requirement 3;

after the three position degrees are adjusted to zero, loosening screws, loosening the quick pressing mechanism, removing the fork part waist-shaped hole position degree detection mechanism and the fork part position degree detection mechanism, and taking out the automobile shifting fork part standard sample;

step two, detecting the position degree of the shifting fork part:

the left end head part of the processed automobile shifting fork part is placed on a datum A1 and a datum A2 of a positioning table, a waist-shaped hole below a right fork part is placed on a datum A3 on a base in the fork part waist-shaped hole position degree detection mechanism, and meanwhile, the waist-shaped hole below the fork part penetrates through a positioning guide cone to be automatically centered, then, the quick pressing mechanism is manually operated, the handle is pulled to press the handle part of the shifting fork, then the screw is screwed, under the action of a screw, the gap between the upper cover plate and the lower cover plate is smaller and smaller, all the tensioning steel balls are extruded to move outwards along the contact conical surfaces of the upper cover plate and the lower cover plate with the steel balls, the tensioning steel balls move outwards along with the tensioning steel balls until all the tensioning steel balls are in contact with the inner hole surface of a central large hole at the left end head of the processed automobile shifting fork part, the center is automatically determined until the tensioning steel balls are tensioned, and at the moment, the left end head of the processed automobile shifting fork part is completely positioned according to the drawing requirements;

the fork part waist-shaped hole position degree detection mechanism is operated again, the movable conical shaft is manually operated to be arranged right above the upper waist-shaped hole of the fork part at the right end of the shifting fork, the movable conical shaft is moved downwards, the head of the movable conical shaft falls into the upper waist-shaped hole of the fork part at the right end of the shifting fork, if the standard sample of the processed automobile shifting fork part is the same as that of the automobile shifting fork part, the measuring seat is still, and the first dial indicator and the second dial indicator are both zero;

if the position degree of the processed automobile shifting fork part is different from the standard sample of the automobile shifting fork part, the measuring seat slightly moves in the front and back direction by rotating the hexagon bolt to drive the movable conical shaft to move in the front and back direction, and simultaneously, the movable conical shaft slightly moves in the left and right direction manually, so that the head of the movable conical shaft falls into an upper waist-shaped hole of a fork part at the right end of the shifting fork, the moving of the movable conical shaft can drive a pointer of a first dial indicator to rotate and a pointer of a second dial indicator to rotate, if the two dial indicators are within a tolerance range, the two dial indicators are qualified, and if the two dial indicators are beyond the tolerance range, the two dial indicators are unqualified;

the fork part position degree detection mechanism is operated again, the sliding block is moved leftwards along the guide rail manually, the upper measuring frame and the lower measuring frame are pressed manually at the same time, the distance between the two measuring frames is smaller than the distance between the two waist-shaped holes, the two measuring frames extend into the space between the two fork parts at the right end of the shifting fork, then the two measuring frames are loosened slightly, the two measuring heads are tightly attached to the upper fork part and the lower fork part, if the position degrees of the two waist-shaped holes of the processed automobile shifting fork part are the same as the standard sample of the automobile shifting fork part, the upper measuring frame is still, and the third percentage is zero;

if the position degrees of two waist-shaped holes of the processed automobile shifting fork part are different from the standard sample of the automobile shifting fork part, the upper measuring frame slightly moves up and down, and the movement of the upper measuring frame drives the ejector rod to move, so that the pointer of the third dial indicator rotates, if the third dial indicator is within the tolerance range, the third dial indicator is qualified, and if the third dial indicator is beyond the tolerance range, the third dial indicator is unqualified;

and step three, after detecting one machined automobile shifting fork part, unloading the detected machined automobile shifting fork part, repeating the step two, detecting the rest machined automobile shifting fork parts to be detected, and after detecting a certain amount of shifting fork parts, performing the step one to calibrate again and then performing detection.

Compared with the prior art, the automobile shifting fork position degree detection tool and the detection method have the beneficial effects that:

1. the operation is simple. The position degree checking fixture does not need professional detection personnel, and a master worker of a common worker can finish the check on whether the position degree of the shifting fork part is qualified or not.

2. The inspection efficiency is high. The shifting fork part is inspected by the position degree inspection device, only two steps are needed, inspection can be completed, and the detection efficiency is greatly improved.

3. The inspection cost is low. The position degree checking fixture is simple to manufacture, low in cost and long in service time, and only needs to calibrate again after detecting a certain amount of position degrees of the shifting fork parts, so that the detection cost is greatly reduced.

4. The detection method has high detection quality.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation of the invention. In the drawings:

FIG. 1 is a schematic perspective view of a fork element;

FIG. 2 is a top view of the fork member;

FIG. 3 is a front view of the fork part;

FIG. 4 is a schematic structural diagram of an automobile shifting fork position degree checking fixture according to an embodiment of the invention;

FIG. 5 is a schematic structural view of a fork head positioning mechanism according to an embodiment of the present invention;

FIG. 6 is a schematic structural view of a square head bolt with an arc;

FIG. 7 is a schematic view of a vertical hand clamp;

FIG. 8 is a schematic structural view of a fork waist-shaped hole position detection mechanism;

fig. 9 is a schematic structural view of the fork position degree detection mechanism.

Description of reference numerals:

1. a shifting fork head positioning mechanism; 2. a base plate; 3. supporting legs; 4. a rapid pressing mechanism; 5. a small boss; 6. a shift fork part; 7. a fork waist-shaped hole position degree detection mechanism; 8. a large boss; 9. a fork position degree detection mechanism; 11. the square head is provided with an arc bolt; 12. a positioning table; 121. reference a 1; 122. reference a 2; 13. a lower cover plate; 14. tensioning the steel balls; 141. an elastic rubber band; 15. an upper cover plate; 16. a screw; 71. a U-shaped bracket; 72. a hexagonal nut; 73. a hexagon bolt; 74. a measuring seat; 75. a first dial indicator; 76. a hexagonal polish rod; 77. a movable conical shaft; 78. a second dial indicator; 741. a small hexagon bolt; 79. reference a 3; 80. positioning a guide cone; 81. a base; 91. a guide rail; 92. a lower measuring frame; 921. an upper measuring frame measuring head; 93. a housing; 94. a slider; 95. a third percentage table; 96. a top rod; 97. and a limiting block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely explained below with reference to the drawings in the embodiments of the present invention. It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict, and the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments.

The invention adopts the technical scheme that the automobile shifting fork 3-position degree checking fixture is made of alloy tool steel. The shifting fork mainly comprises nearly 30 parts, as shown in figure 1, a shifting fork object figure is provided, the left end of the shifting fork object figure is provided with a central big hole, the surface of an inner hole has certain taper, and the taper is small; the right end is provided with two waist-shaped holes. As shown in fig. 2-3, which are parts of the fork, in the drawings, a1, a2 and A3 are references a, i.e. step surfaces; b, reference, namely the inner hole surface of the left end central big hole; and C, reference, namely a horizontal center plane of the right waist-shaped hole. The position degree requirement has 3 places, and the position degree requirement 1, two waist type hole length direction position degree tolerance about the shift fork right end is 0.5 mm. The position degree requirement is 2, and the position degree tolerance of the upper and lower waist-shaped holes at the right end of the shifting fork in the width direction is 0.5 mm. The position degree requirement is 3, and the distance position degree tolerance between the two waist-shaped holes at the right end of the shifting fork is 0.5 mm.

As shown in fig. 4-9, an inspection device for detecting the position degree of a shifting fork of an automobile comprises a shifting fork head positioning mechanism 1, a rapid pressing mechanism 4, a fork waist-shaped hole position degree detection mechanism 7 and a fork position degree detection mechanism 9, all the mechanisms are arranged on a bottom plate 2, the shifting fork head positioning mechanism 1 and the fork position degree detection mechanism 9 are respectively arranged at the left side and the right side of the bottom plate 2, the rapid pressing mechanism 4 and the fork waist-shaped hole position degree detection mechanism 7 are arranged between the shifting fork head positioning mechanism 1 and the fork position degree detection mechanism 9, the shifting fork head positioning mechanism 1 positions the head of a shifting fork part 6, the rapid pressing mechanism 4 presses the handle part of the shifting fork part 6, the fork waist-shaped hole position degree detection mechanism 7 detects the position degree of the waist-shaped hole of the shifting fork part 6 in the length direction and the position degree of the shifting fork in the width direction, the fork position degree detection mechanism 9 detects the position degree of the distance between the two waist-shaped holes of the fork part of the shifting fork part 6.

The shifting fork head positioning mechanism 1 comprises a square head arc bolt 11, a positioning table 12, a lower cover plate 13, tensioning steel balls 14 and an upper cover plate 15, the upper cover plate 15 and the lower cover plate 13 are sequentially arranged above the positioning table 12, a plurality of tensioning steel balls 14 are arranged between the upper cover plate 15 and the lower cover plate 13, the contact surfaces of the upper cover plate 15, the lower cover plate 13 and the tensioning steel balls 14 are conical surfaces, all the tensioning steel balls 14 are connected in series through elastic rubber ribs 141, through holes are formed in the centers of the positioning table 12, the upper cover plate 15 and the lower cover plate 13, a threaded hole is formed in the tail of the square head arc bolt 11, the square head arc bolt 11 sequentially penetrates through a bottom plate 2, the positioning table 12 and the upper cover plate 15 and is in threaded connection with a screw 16 penetrating through the lower cover plate 13 through threaded holes, a reference A1121 and a reference A2122 are arranged on the positioning table 12, when detection is carried out, the head of the shifting fork part 6 is sleeved on the peripheries of the upper cover plate 15 and the lower cover plate 13, the bottom surface of the head of the shifting fork part 6 is arranged on two references, the lower cover plate 13 is pressed through the tightening screw 16, the lower cover plate 13 extrudes the tensioning steel ball 14, the tensioning steel ball 14 moves outwards to be in contact with the inner surface of the central large hole of the head of the shifting fork part 6, and the head of the shifting fork is positioned.

The positioning table 12 is of a cylindrical structure, the diameter of a cylinder at the bottom is slightly larger, the diameter of a cylinder at the upper part is slightly smaller, a hole is formed in the middle, two small cylinders which are spaced by 180 degrees along the circumference are arranged on the upper surface of the positioning table 12, wherein the small cylinder 122 corresponds to a reference A1 in the drawing, the small cylinder 121 corresponds to a reference A2 in the drawing, and the two supporting points are also two supporting points on the bottom surface of the left end of the shifting fork to play a positioning role; the lower cover plate 13 and the upper cover plate 15 are both of cylindrical structures, and the centers of the lower cover plate and the upper cover plate are provided with holes; the diameter of a head cylinder of the screw 16 is larger than that of a central hole of the upper cover plate 15, and a tail thread is screwed with a tail threaded hole of the square-headed arc bolt 11 to clamp a large hole at the left end of the shifting fork; the tensioning steel balls 14 are spherical bodies, the centers of the tensioning steel balls are provided with holes, a plurality of tensioning steel balls are arranged between the upper cover plate and the lower cover plate along the circumference and are close to each other, and the elastic rubber bands 141 penetrate through the steel ball holes, so that all the tensioning steel balls are tightly attached to the upper cover plate and the lower cover plate at the conical surfaces;

the central large hole at the left end of the shifting fork has certain dimensional tolerance, the diameters of the upper cover plate and the lower cover plate are slightly smaller than the minimum value of the diameter of the central large hole at the left end of the shifting fork, the left end of the shifting fork is placed on two small supporting cylinders of the base under the state that the bolt 11 and the screw 16 are not screwed, and the diameter of the upper cover plate and the diameter of the lower cover plate are smaller than the diameter of the central large hole at the left end of the shifting fork, so that the upper cover plate and the lower cover plate are in clearance fit; then the screw 16 is screwed, a downward force is applied to the upper cover plate, under the action of the downward force, the gap between the upper cover plate and the lower cover plate becomes smaller and smaller, all the tensioning steel balls are extruded at the same time, the upper cover plate and the lower cover plate move outwards along the contact conical surfaces of the steel balls, the tensioning steel balls move outwards along with the tensioning steel balls until all the steel balls are in contact with the inner hole surface of the central large hole at the left end of the shifting fork, the center is automatically determined until the steel balls are tensioned, and the B datum is related to the steel ball tensioning structure; at this time, the tightening of the screw 16 is completed, and the left end of the shift fork is positioned.

The fork part waist-shaped hole position degree detection mechanism 7 comprises a U-shaped support 71, a measuring seat 74, a first dial indicator 75, a movable conical shaft 77, a second dial indicator 78, a base 81 and a positioning guide cone 80, wherein the U-shaped support 71 is installed at the rear part of the large boss 8, the measuring seat 74 is arranged on the upper surface of the large boss 8, a hexagonal bolt 73 penetrates through the U-shaped hole of the U-shaped support 71 to be in threaded connection with the rear end of the measuring seat 74, two sides of the U-shaped support 71 on the hexagonal bolt 73 are respectively matched with a hexagonal nut 72, a waist-shaped hole is formed in the measuring seat 74, a hexagonal polished rod 76 penetrates through the waist-shaped hole of the measuring seat 71 and then is fixed on the large boss 8, the front end of the measuring seat 74 extends out of the front end edge of the large boss 8 and the hexagonal bolt 73 is rotated to drive the measuring seat 74 to move back and forth;

a guide cylinder is fixedly arranged at the front part of the measuring seat 74, the movable conical shaft 77 penetrates through the guide cylinder and the measuring seat 74 to be arranged, a gauge seat of a first dial indicator 75 is fixed on the left side surface of the large boss 8, a gauge seat of a second dial indicator 78 is fixed on the right side surface of the large boss 8, measuring heads of the first dial indicator 75 and the second dial indicator 78 penetrate through the guide cylinder to be in surface contact with the movable conical shaft 77, two small hexagonal bolts 741 are symmetrically arranged on the left side surface and the right side surface of the front part of the measuring seat 74, a spring is sleeved on each small hexagonal bolt 741, one end of each spring is fixed on each small hexagonal bolt 741, and the free end of each spring abuts against the movable conical shaft 77 penetrating through the guide cylinder;

the base 81 is arranged on the bottom plate 2, the base 81 can be fixed on the bottom plate through screws, a positioning guide cone 80 is arranged at the center of the base 81, a reference A379 is arranged on the base 81, a shifting fork of the shifting fork part 6 is arranged on the reference A379 during detection, the positioning guide cone 80 penetrates through a waist-shaped hole below a fork part of the shifting fork part 6, and the movable cone shaft 77 is matched with the waist-shaped hole above the fork part of the shifting fork part 6;

the section of the positioning and guiding cone 80 is waist-shaped, and the outer circular surface has a certain taper at the same time, so that the positioning and guiding cone has a guiding and self-centering function; the movable taper shaft 77 passes through the measuring seat, is matched with the waist-shaped hole of the shifting fork in the detection process, is in a waist-shaped shaft structure (the section is waist-shaped), and has a certain taper to play a guiding function and a self-centering function.

The fork position degree detection mechanism 9 comprises a guide rail 91, a lower measuring frame 92, an upper measuring frame, a shell 93, an L-shaped sliding block 94, a dial indicator III 95 and a push rod 96, wherein the guide rail 91 is arranged on the bottom plate 2, the guide rail 91 can be fixed on the bottom plate 2 through screws, the L-shaped sliding block 94 is arranged on the guide rail 91 in a sliding manner, the push rod 96 penetrates through the vertical part of the L-shaped sliding block 94, the push rod 96 is fixedly connected with the upper measuring frame, the upper measuring frame and the lower measuring frame 92 are symmetrically arranged, a spring is arranged between the upper measuring frame and the lower measuring frame 92, the two measuring frames can be close to or far away under the condition of manual pressing or loosening, and the two measuring frames can realize automatic centering and centering under the action of an elastic device; and measuring frame measuring heads are respectively arranged at the upper end of the upper measuring frame and the lower end of the lower measuring frame 92, the third dial indicator 95 is installed at the top end of the L-shaped sliding block 94, the measuring heads of the third dial indicator 95 penetrate through the L-shaped sliding block 94 to abut against the surface of the ejector rod 96, and during detection, the L-shaped sliding block 94 slides on the guide rail 91 to enable the side heads of the two measuring frames to abut against the fork position of the shifting fork part 6.

A limiting block 97 for limiting the movement displacement of the L-shaped sliding block 94 is arranged at the right end of the guide rail 91 and used for limiting the rightmost movement position of the sliding block 94, a shell 93 for protecting the upper measuring frame and the lower measuring frame 92 is fixedly arranged on the L-shaped sliding block 94, the shell 93 is of a front-back symmetrical structure, a groove is formed in the middle of the shell, and the measuring frame is arranged in the groove of the shell and plays a role in protecting the measuring frame.

The datum A1121, the datum A2122 and the datum A379 are all small cylindrical structures, the datum A1121 and the datum A2122 are arranged at intervals of 180 degrees, and the three datum structures are determined according to the requirements of the drawing.

The rapid pressing mechanism 4 is arranged on the small boss 5, the rapid pressing mechanism 4 is a vertical manual clamp, the clamp is a steel vertical manual clamp, and the model is CH-12130-HB; the shifting fork can be pressed or loosened by pulling the handle. The small boss 5 and the large boss 8 are fixed on the bottom plate 2.

Four supporting legs 3 are evenly arranged at the bottom of the bottom plate 2 and used for supporting the overall checking fixture.

A detection method of an automobile shifting fork position degree detection tool specifically comprises the following steps:

step one, setting a zero position of a position degree gauge:

the left end head part of the automobile shifting fork part standard sample is placed on a reference A1121 and a reference A2122 of a positioning table 12, a waist-shaped hole below a right fork part is placed on a reference A379 on a base 81 in a fork part waist-shaped hole position degree detection mechanism 7, meanwhile, the waist-shaped hole below penetrates through a positioning guide cone 80 to be automatically centered, then, the rapid pressing mechanism 4 is manually operated, the handle is pulled to press the handle part of the shifting fork, the screw 16 is screwed, under the action of the screw 16, the gap between the upper cover plate 15 and the lower cover plate 13 is smaller and smaller, and simultaneously all the tensioning steel balls 14 are extruded to move outwards along the contact conical surfaces of the upper cover plate 13 and the lower cover plate 13 and the steel balls, and move outwards along with the tensioning steel balls 14 until all the tensioning steel balls 14 are in contact with the inner hole surface of the central large hole at the left end head of the standard sample of the automobile shifting fork part, and are self-centered until tensioning is finished, and at this time, the positioning of the left end head of the standard sample of the automobile shifting fork part is finished;

operating the fork part waist-shaped hole position degree detection mechanism 7, moving the measuring seat 74 back and forth to enable the movable conical shaft 77 to be right above the upper waist-shaped hole of the fork part at the right end of the shifting fork, fixing the measuring seat 74, moving the movable conical shaft 77 downwards to enable the head of the movable conical shaft to fall into the upper waist-shaped hole of the fork part at the right end of the shifting fork, fixing the movable conical shaft 77 through a left hexagonal bolt 73 and a right hexagonal bolt 73 on the measuring seat 74, enabling the measuring seat 74 to be at a zero position, adjusting the first dial indicator 75 and the second dial indicator 78 to return to zero, and completing the setting of the zero positions of the position degree requirement 1 and the position degree requirement 2;

operating the fork part position degree detection mechanism 9, manually moving the slide block 94 leftwards along the guide rail 91, simultaneously manually pressing the upper and lower measurement frames 92 to enable the distance between the two measurement frames to be smaller than the distance between the two waist-shaped holes, extending the measurement frames into the space between the two fork parts at the right end of the shifting fork, then slightly loosening the two measurement frames to enable the two measuring heads to be tightly attached to the upper and lower fork parts, wherein the position of the measurement frame is a zero position, and simultaneously adjusting the third percentile 95 to return to zero to complete the setting of the zero position required by the position degree of 3;

after the three position degrees are adjusted to zero, loosening the screw 16, loosening the quick pressing mechanism 4, withdrawing the fork part waist-shaped hole position degree detection mechanism 7 and the fork part position degree detection mechanism 9, and taking out the automobile shifting fork part standard sample;

step two, detecting the position degree of the shifting fork part 6:

the left end part of the processed automobile shifting fork part is placed on a reference A1121 and a reference A2122 of a positioning table 12, a waist-shaped hole below the right fork part is placed on a reference A379 on a base 81 in a fork part waist-shaped hole position degree detection mechanism 7, meanwhile, the lower waist-shaped hole penetrates through a positioning guide cone 80 to be automatically centered, then, the rapid pressing mechanism 4 is manually operated, the handle is pulled to press the handle part of the shifting fork, the screw 16 is screwed, under the action of the screw 16, the gap between the upper cover plate 15 and the lower cover plate 13 is smaller and smaller, all the tensioning steel balls 14 are extruded to move outwards along the contact conical surfaces of the upper cover plate 13 and the lower cover plate 13 and the steel balls, the tensioning steel balls 14 move outwards along with the extrusion until all the tensioning steel balls 14 are in contact with the inner hole surface of the central large hole of the left end head of the processed automobile shifting fork part 6, the center is automatically determined until the tensioning is finished, and at this time, the left end head of the processed automobile shifting fork part is completely positioned according to the drawing requirements;

the fork part waist-shaped hole position degree detection mechanism 7 is operated again, the movable conical shaft 77 is manually operated to be positioned right above the upper waist-shaped hole of the fork part at the right end of the shifting fork, the movable conical shaft 77 is moved downwards, the head of the movable conical shaft falls into the upper waist-shaped hole of the fork part at the right end of the shifting fork, if the standard sample of the processed automobile shifting fork part 6 is the same as that of the automobile shifting fork part 6, the measuring seat 74 is still, and the first dial indicator 75 and the second dial indicator 78 are both zero;

if the position degree of the processed automobile shifting fork part is different from that of the automobile shifting fork part 6, the measuring seat 74 slightly moves back and forth by rotating the hexagon bolt 73 to drive the movable conical shaft 77 to move back and forth, and simultaneously the movable conical shaft 77 slightly moves left and right manually, so that the head of the movable conical shaft 77 falls into the upper waist-shaped hole of the fork part at the right end of the shifting fork, the pointer of the first dial indicator 75 is driven to rotate and the pointer of the second dial indicator 78 is driven to rotate by the movement of the movable conical shaft 77, if the two dial indicators are within the tolerance range, the two dial indicators are qualified, and if the two dial indicators exceed the tolerance range, the two dial indicators are unqualified;

the fork part position degree detection mechanism 9 is operated again, the slide block 94 is moved leftwards along the guide rail 91 by hand, the upper and lower measuring frames 92 are pressed by hand at the same time, the distance between the two measuring frames is smaller than the distance between the two waist-shaped holes, the two measuring frames are extended into the space between the two fork parts at the right end of the shifting fork, then the two measuring frames are loosened slightly, the two measuring heads are tightly attached to the upper and lower fork parts, if the position degrees of the two waist-shaped holes of the processed automobile shifting fork part are the same as the standard sample of the automobile shifting fork part, the upper measuring frame is still, and the third percentile is zero 95;

if the position degrees of two waist-shaped holes of the processed automobile shifting fork part 6 are different from the standard sample of the automobile shifting fork part, the upper measuring frame slightly moves up and down, and the movement of the upper measuring frame drives the ejector rod 96 to move, so that the pointer of the third dial indicator 95 rotates, if the third dial indicator 95 is in a tolerance range, the automobile shifting fork part is qualified, and if the third dial indicator 95 is out of the tolerance range, the automobile shifting fork part is unqualified;

and step three, after detecting one machined automobile shifting fork part 6, detaching the detected machined automobile shifting fork part 6, repeating the step two, detecting the rest machined automobile shifting fork parts to be detected, and after detecting a certain amount of shifting fork parts, performing the step one to calibrate again and then detecting.

The embodiments of the invention disclosed above are intended only to aid in the description of the invention. The examples are not intended to be exhaustive or to limit the invention to the precise embodiments described. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand the invention for and with the various embodiments.

Claims

1. The utility model provides an utensil is examined to car shift fork position degree which characterized in that: comprises a shifting fork head positioning mechanism (1), a rapid pressing mechanism (4), a fork waist-shaped hole position degree detection mechanism (7) and a fork position degree detection mechanism (9), all mechanisms are arranged on a bottom plate (2), the shifting fork head positioning mechanism (1) and the fork position degree detection mechanism (9) are respectively arranged at the left side and the right side of the bottom plate (2), the rapid pressing mechanism (4) and the fork waist-shaped hole position degree detection mechanism (7) are arranged between the shifting fork head positioning mechanism (1) and the fork position degree detection mechanism (9), the shifting fork head positioning mechanism (1) positions the head of a shifting fork part (6), the rapid pressing mechanism (4) presses the handle part of the shifting fork part (6), the fork waist-shaped hole position degree detection mechanism (7) detects the length direction position degree and the width direction position degree of the waist-shaped hole of the shifting fork part (6), the fork part position degree detection mechanism (9) detects the position degree of the distance between the two waist-shaped holes of the fork part of the shifting fork part (6).

2. The automobile shifting fork position degree checking fixture according to claim 1, characterized in that: the shifting fork head positioning mechanism (1) comprises a square head arc bolt (11), a positioning table (12), a lower cover plate (13), tensioning steel balls (14) and an upper cover plate (15), wherein the upper cover plate (15) and the lower cover plate (13) are sequentially arranged above the positioning table (12), a plurality of tensioning steel balls (14) are arranged between the upper cover plate (15) and the lower cover plate (13), the contact surfaces of the upper cover plate (15) and the lower cover plate (13) with the tensioning steel balls (14) are conical surfaces, all the tensioning steel balls (14) are connected in series through elastic rubber bands (141), through holes are respectively arranged at the centers of the positioning table (12), the upper cover plate (15) and the lower cover plate (13), a threaded hole is formed at the tail part of the square head arc bolt (11), the square head arc bolt (11) sequentially penetrates through a bottom plate (2), the positioning table (12) and the upper cover plate (15) to be in threaded connection with a screw (16) penetrating through the lower cover plate (13) through the threaded hole, the positioning table (12) is provided with a datum A1(121) and a datum A2(122), during detection, the head of the shifting fork part (6) is sleeved on the peripheries of the upper cover plate (15) and the lower cover plate (13), the bottom surface of the head of the shifting fork part (6) is arranged on the two datums, the lower cover plate (13) is pressed through the tightening screw (16), and the lower cover plate (13) extrudes the tensioning steel ball (14) to enable the tensioning steel ball (14) to move outwards to be in contact with the inner surface of the central large hole in the head of the shifting fork part (6) to position the head of the shifting fork.

3. The automobile shifting fork position degree checking fixture according to claim 2, characterized in that: the fork part waist-shaped hole position degree detection mechanism (7) comprises a U-shaped support (71), a measuring seat (74), a first dial indicator (75), a movable conical shaft (77), a second dial indicator (78), a base (81) and a positioning guide cone (80), wherein the U-shaped support (71) is installed at the rear part of a large boss (8), the measuring seat (74) is arranged on the upper surface of the large boss (8), a hexagonal bolt (73) penetrates through the U-shaped hole of the U-shaped support (71) to be in threaded connection with the rear end of the measuring seat (74), two sides of the U-shaped support (71) on the hexagonal bolt (73) are respectively matched with a hexagonal nut (72), the waist-shaped hole is formed in the measuring seat (74), a polish rod (76) penetrates through the waist-shaped hole of the measuring seat (74) to be fixed on the large boss (8), and the front end of the measuring seat (74) extends out of the edge of the front end of the large boss (8), the measuring seat (74) is driven to move back and forth by rotating the hexagon bolt (73);

a guide cylinder is fixedly arranged at the front part of the measuring seat (74), the movable conical shaft (77) penetrates through the guide cylinder and the measuring seat (74) to be arranged, a gauge seat of the first dial indicator (75) is fixed on the left side surface of the large boss (8), a gauge seat of the second dial indicator (78) is fixed on the right side surface of the large boss (8), measuring heads of the first dial indicator (75) and the second dial indicator (78) penetrate through the guide cylinder to be in surface contact with the movable conical shaft (77), two small hexagonal bolts (741) are symmetrically arranged on the left side surface and the right side surface of the front part of the measuring seat (74), a spring is sleeved on each small hexagonal bolt (741), one end of each spring is fixed on each small hexagonal bolt (741), and the free end of each spring abuts against the movable conical shaft (77) penetrating through the guide cylinder;

base (81) set up on bottom plate (2), are equipped with location direction circular cone (80) in the center department of base (81), are equipped with benchmark A3(79) on base (81), during the detection, the shift fork of shift fork part (6) is arranged in on benchmark A3(79), and location direction circular cone (80) pass the waist type hole of fork portion below of shift fork part (6), and activity awl axle (77) and the waist type hole cooperation of the fork portion top of shift fork part (6).

4. The automobile shifting fork position degree checking fixture according to claim 1, characterized in that: the fork part position degree detection mechanism (9) comprises a guide rail (91), a lower measuring frame (92), an upper measuring frame, a shell (93), an L-shaped sliding block (94), a dial indicator (95) and a top rod (96), wherein the guide rail (91) is arranged on the bottom plate (2), the L-shaped sliding block (94) is arranged on the guide rail (91) in a sliding manner, the top rod (96) penetrates through the vertical part of the L-shaped sliding block (94) to be arranged, the top rod (96) is fixedly connected with the upper measuring frame, the upper measuring frame and the lower measuring frame (92) are symmetrically arranged, a spring is arranged between the upper measuring frame and the lower measuring frame (92), measuring frame measuring heads are respectively arranged at the upper end of the upper measuring frame and the lower end of the lower measuring frame (92), the dial indicator (95) is arranged at the top end of the L-shaped sliding block (94), and the measuring head of the dial indicator (95) penetrates through the L-shaped sliding block (94) to abut against the surface of the top rod (96), during detection, the L-shaped sliding block (94) slides on the guide rail (91) to enable the measuring heads of the two measuring frames to abut against the fork part position of the shifting fork part (6).

5. The automobile shifting fork position degree checking fixture according to claim 4, characterized in that: a limiting block (97) for limiting the movement displacement of the L-shaped sliding block (94) is arranged at the right end of the guide rail (91), and a shell (93) for protecting the upper measuring frame and the lower measuring frame (92) is fixedly arranged on the L-shaped sliding block (94).

6. The automobile shifting fork position degree checking fixture according to claim 3, characterized in that: the datum A1(121), the datum A2(122) and the datum A3(79) are all in a small cylindrical structure, and the datum A1(121) and the datum A2(122) are arranged at an interval of 180 degrees, and the three datums are determined according to the requirements of the drawing.

7. The automobile shifting fork position degree checking fixture according to claim 2, characterized in that: the rapid pressing mechanism (4) is installed on the small boss (5), and the small boss (5) and the large boss (8) are fixed on the base plate (2).

8. The automobile shifting fork position degree checking fixture according to claim 1, characterized in that: the rapid pressing mechanism (4) is a vertical manual clamp.

9. The automobile shifting fork position degree checking fixture according to claim 1, characterized in that: four supporting legs (3) are uniformly arranged at the bottom of the bottom plate (2).

10. The detection method of the automobile shifting fork position degree detection tool according to any one of claims 1 to 9, wherein the detection method comprises the following steps: the method specifically comprises the following steps:

step one, setting a zero position of a position degree gauge:

the left end head of the standard sample of the automobile shifting fork part is placed on a reference A1(121) and a reference A2(122) of a positioning table (12), a waist-shaped hole below the right end fork part is placed on a reference A3(79) on a base (81) in a fork-part waist-shaped hole position detection mechanism (7), meanwhile, the lower waist-shaped hole penetrates through a positioning guide cone (80) to be automatically centered, then, a rapid pressing mechanism (4) is manually operated, a handle is pulled to press a shifting fork handle part, a screw (16) is screwed, under the action of the screw (16), a gap between an upper cover plate (15) and a lower cover plate (13) is smaller and smaller, all tensioning steel balls (14) are extruded to move outwards along the contact conical surfaces of the upper cover plate (13) and the lower cover plate (13) and the steel balls and move outwards along with the tensioning steel balls (14) until all inner holes of the shifting fork tensioning steel balls (14) are in contact with the large central hole surface of the left end head of the standard sample of the automobile shifting fork part, centering by self until tensioning, and finishing positioning the left end head part of the automobile shifting fork part standard sample;

operating a fork part waist-shaped hole position degree detection mechanism (7), moving a measuring seat (74) back and forth to enable a movable conical shaft (77) to be located right above a waist-shaped hole in the fork part at the right end of a shifting fork, fixing the measuring seat (74), moving the movable conical shaft (77) downwards to enable the head of the movable conical shaft to fall into the waist-shaped hole in the fork part at the right end of the shifting fork, fixing the movable conical shaft (77) through a left hexagonal bolt (73) and a right hexagonal bolt (73) on the measuring seat (74), enabling the position of the measuring seat (74) to be a zero position, adjusting a first dial indicator (75) and a second dial indicator (78) to return to zero at the same time, and completing the setting of the zero positions of a position degree requirement 1 and a position degree requirement 2;

operating the fork part position degree detection mechanism (9), manually moving the sliding block (94) to move leftwards along the guide rail (91), simultaneously manually pressing the upper and lower measuring frames (92) to enable the distance between the two measuring frames to be smaller than the distance between the two waist-shaped holes, extending the measuring frames into the space between the two fork parts at the right end of the shifting fork, then slightly loosening the two measuring frames to enable the two measuring heads to be tightly attached to the upper and lower fork parts, wherein the position of the measuring frame is a zero position, and simultaneously adjusting the third dial indicator (95) to return to zero to complete the setting of the zero position required by the position degree of 3;

after the three position degrees are adjusted to zero, loosening the screw (16), loosening the quick pressing mechanism (4), withdrawing the fork part waist-shaped hole position degree detection mechanism (7) and the fork part position degree detection mechanism (9), and taking out the automobile shifting fork part standard sample;

step two, detecting the position degree of the shifting fork part (6):

the left end head part of the processed automobile shifting fork part is placed on a reference A1(121) and a reference A2(122) of a positioning table (12), a waist-shaped hole below the right end fork part is placed on a reference A3(79) on a base (81) in a fork part waist-shaped hole position detection mechanism (7), meanwhile, the lower waist-shaped hole penetrates through a positioning guide cone (80) to be automatically centered, then, a rapid pressing mechanism (4) is manually operated, a handle is pulled to press a shifting fork handle part, a screw (16) is screwed, a gap between an upper cover plate (15) and a lower cover plate (13) is smaller and smaller under the action of the screw (16), all tensioning steel balls (14) can be extruded to move outwards along the upper cover plate (13) and the steel ball contact conical surfaces, and move outwards along with the tensioning steel balls (14) until all the tensioning steel balls (14) are in contact with the inner hole of a large hole in the center of the left end head part of the processed automobile shifting fork part (6), centering by self until tensioning, and completely positioning the left end head part of the machined automobile shifting fork part according to the drawing requirements;

the fork part waist-shaped hole position degree detection mechanism (7) is operated again, the movable conical shaft (77) is manually operated to be arranged right above the upper waist-shaped hole of the fork part at the right end of the shifting fork, the movable conical shaft (77) is moved downwards, the head of the movable conical shaft falls into the upper waist-shaped hole of the fork part at the right end of the shifting fork, if the standard sample of the processed automobile shifting fork part (6) is the same as that of the automobile shifting fork part (6), the measuring seat (74) is static, and the first dial indicator (75) and the second dial indicator (78) are both zero;

if the position degree of the processed automobile shifting fork part is different from the standard sample of the automobile shifting fork part (6), the measuring seat (74) slightly moves in the front and back direction by rotating the hexagon bolt (73) to drive the movable conical shaft (77) to move in the front and back direction, and simultaneously, the movable conical shaft (77) slightly moves in the left and right direction by hand, so that the head of the movable conical shaft (77) falls into the upper waist-shaped hole of the fork part at the right end of the shifting fork, the pointer of the first dial indicator (75) is driven to rotate and the pointer of the second dial indicator (78) is driven to rotate by the movement of the movable conical shaft (77), if the two dial indicators are within the tolerance range, the two dial indicators are qualified, and if the two dial indicators exceed the tolerance range, the two dial indicators are unqualified;

the fork part position degree detection mechanism (9) is operated again, the slide block (94) is moved leftwards along the guide rail (91) by manual movement, the upper and lower measuring frames (92) are pressed by manual operation at the same time, the distance between the two measuring frames is smaller than the distance between the two waist-shaped holes, the two measuring frames extend into the space between the two fork parts at the right end of the shifting fork, then the two measuring frames are loosened slightly, the two measuring heads are tightly attached to the upper and lower fork parts, if the position degrees of the two waist-shaped holes of the processed automobile shifting fork part are the same as the standard sample of the automobile shifting fork part, the upper measuring frame is still, and the third percentile (95) is zero;

if the position degrees of two waist-shaped holes of the processed automobile shifting fork part (6) are different from the standard sample of the automobile shifting fork part, the upper measuring frame slightly moves up and down, and the movement of the upper measuring frame drives the ejector rod (96) to move, so that the pointer of the third dial indicator (95) rotates, if the third dial indicator (95) is within the tolerance range, the third dial indicator is qualified, and if the third dial indicator (95) is beyond the tolerance range, the third dial indicator is unqualified;

and step three, after detecting one machined automobile shifting fork part (6), unloading the detected machined automobile shifting fork part (6), repeating the step two, detecting the rest machined automobile shifting fork parts to be detected, and after detecting a certain amount of shifting fork parts, performing the step one to calibrate again and then detecting.