CN210773778U

CN210773778U - Multifunctional checking fixture for timing angle and key groove angle on crankshaft

Info

Publication number: CN210773778U
Application number: CN201922228657.4U
Authority: CN
Inventors: 李红兵
Original assignee: TAIZHOU HONGXIN CRANKSHAFT CO Ltd
Current assignee: TAIZHOU HONGXIN CRANKSHAFT CO Ltd
Priority date: 2019-12-12
Filing date: 2019-12-12
Publication date: 2020-06-16
Anticipated expiration: 2029-12-12

Abstract

The utility model provides a multi-functional utensil of examining that is used for angle in right time and keyway angle on bent axle belongs to and examines a technical field. It includes the percentage table, the bottom plate and all be fixed in the left branch seat on the bottom plate, the right branch seat, the plug gage in the keyway on the location support and can insert the right crank, be fixed with on the left branch seat and decide top, it is provided with the live center to slide on the right branch seat, it is provided with the bolt to slide along the horizontal direction on the location support, the slip direction of bolt is mutually perpendicular with the axis of deciding top, link firmly equal altitude piece on the bottom plate, detachable connection has the reference column on the left branch seat, the reference column is located the both sides and the reference column of deciding top and decides top parallel arrangement with the bolt. The multifunctional electric heating furnace has the advantages of being rich in functions, wide in applicability, capable of reducing production cost of enterprises, convenient to operate and the like.

Description

Multifunctional checking fixture for timing angle and key groove angle on crankshaft

Technical Field

The utility model belongs to the technical field of examine the utensil, relate to and examine the utensil, especially relate to a multi-functional utensil of examining that is used for angle in right time and keyway angle on the bent axle.

Background

The bent axle is the key part with cylinder piston linear motion conversion circular motion, and it generally includes left crank, right crank and is fixed in the crank pin between left crank and the right crank, can cup joint the connecting rod on the crank pin when using, and piston motion transmits power to the crank pin through the connecting rod and then drives the bent axle and rotate. Some bent axles adopt the pressure equipment mode to accomplish when the equipment, like insert the crank pin hole on the left crank with crank pin one end earlier, then insert the crank pin other end on the crank pin hole on the right crank. Before a left crank and a right crank are assembled into a crankshaft, a timing gear is pressed on the left crank, and a timing angle needs to be determined between the timing gear and a central line of a crank pin hole; similarly, a semicircular key groove is formed in the right crank, and a key groove angle is required to be formed between the key groove and the crank pin hole. No matter the angle of timing or the angle of the key slot, the angle plays an important role when the crankshaft works, so whether the angle of timing and the angle of the key slot meet the design requirements or not is very important, and special detection is needed before the left crank and the right crank are assembled into a complete crankshaft.

Aiming at the detection of the timing angle on a left crank, the Chinese patent discloses a crankshaft external spline timing angle detection tool with application number 200820217156.5, which comprises a bottom plate, a left support, a positioning support, a right support, a taper core rod and a dial indicator, wherein coaxial holes are arranged on the left support and the right support which are spaced, a hole plug on the left support is provided with a fixed tip, a bush is arranged in an inner hole of the right support, a movable tip consisting of a handle, a spring, a pin, a gland and an adjusting nut can be axially adjusted in the bush, the movable tip is opposite to the tip of the fixed tip, a tooth-shaped positioning strip locked by a screw is arranged in a square through hole at the upper end of the positioning support, the center of the tooth-shaped positioning strip of a slender rod is equal in height and horizontally vertical to the connecting line of the fixed tip and the movable tip, and a single concave tooth-. During detection, the taper core rod is inserted into a crank hole in the large end face of the left crank, then the handle is pulled to enable the live center to contract inwards, the fixed center is matched with a center hole in the large end face of the left crank, and then the handle is loosened to enable the live center to be propped against the center hole in the right end of the left crank, so that the axial positioning of the left crank is realized; the tooth-shaped positioning strip with equal height is inserted from the radial direction and is matched with the external spline of the crankshaft by a single concave tooth shape at the end part; and finally, moving a dial indicator to measure the height difference of the taper core rod and the rod diameter of the same section of the left crank, and then converting the angle difference to judge whether the right-time angle is qualified.

However, the crankshaft external spline timing angle checking fixture can only realize the detection of the timing angle, has a single function, cannot realize the detection of the key slot angle on the right crank, and also needs to insert a taper core rod when detecting the timing angle, so that the operation is very troublesome and is not practical. For the detection of the key groove angle on the right crank, a conventional mode is to additionally design a set of detection tool specially used for detecting the key groove angle, such as a detection tool for detecting the crankshaft semicircular key groove disclosed by the patent application No. 201720799923.7, a detection tool for detecting the position of the crankshaft key groove disclosed by the patent application No. 201410618473.8, a detection tool for detecting the crankshaft semicircular key groove combination disclosed by the patent application No. 201621327929.6, and the like.

Disclosure of Invention

The utility model aims at the above-mentioned problem that prior art exists, provide a multi-functional utensil of examining that is used for angle in right time and keyway angle on the bent axle, solved ordinary problem of examining a function singleness, the suitability is poor and inconvenient operation.

The purpose of the utility model can be realized by the following technical proposal:

a multifunctional checking fixture for timing angles and key groove angles on a crankshaft comprises a dial indicator, a bottom plate, a left support, a right support and a positioning support, wherein the left support, the right support and the positioning support are all fixed on the bottom plate, a fixed center is fixed on the left support, a live center which is coaxial with the fixed center is arranged on the right support in a sliding mode, the left support and the right support are located on the same side of the positioning support, the multifunctional checking fixture is characterized in that a bolt is arranged on the positioning support in a sliding mode along the horizontal direction, the sliding direction of the bolt is perpendicular to the axis of the fixed center, the end portion of the bolt can be inserted into a corresponding tooth groove of a timing gear on a left crank, an equal-height block which corresponds to the highest position of a crank pin fixed on the left crank is fixedly connected onto the bottom plate, a positioning column which can be inserted into a crank pin hole, the multifunctional checking fixture further comprises a plug gauge which can be inserted into the key groove on the right crank.

The crankshaft comprises a left crank, a right crank and a crank pin connected between the left crank and the right crank, wherein a timing gear is fixed on the left crank, a key groove is formed in the right crank, and a timing angle is formed between the timing gear and the crank pin; the right crank can be provided with a key groove according to actual needs, and a key groove angle is formed between the key groove and the crank pin.

When detecting the timing angle on the left crank, dismantle the reference column from the left support and avoid interfering, then will be fixed with the left crank one end centre bore of crank pin and timing gear and decide top and cooperate to control live center top in this left crank's the other end centre bore. After the left crank is clamped, the end part of the bolt is controlled to be inserted into a tooth groove corresponding to the outer side of the timing gear on the left crank, then the dial indicator is moved to measure the height difference between the upper end face of the equal-height block and the highest position of the crank pin fixed on the left crank, and then the angle difference is converted, so that whether the timing angle of the detected timing gear is qualified or not is judged.

When detecting the keyway angle on the right crank, connect the reference column on left support, then utilize fixed top and movable top to push up the both ends on the right crank equally, it is downthehole to ensure that the reference column inserts the crank pin on the right crank simultaneously. Then, insert plug gage one end in the keyway on the right crank, move the percentage table again at last and measure the difference in height from the plug gage inserts the one end in the keyway to the other end, then convert the angular difference to judge whether qualified by the keyway angle that is detected.

Whether this multi-functional utensil of examining can be qualified to the timing angle of timing gear on the left crank detects and can detect whether qualified keyway angle on the right crank has richened the function of examining the utensil well, has improved the suitability, has reduced manufacturing cost. In addition, the positioning column is detachably connected with the left support, so that the interference caused by the detection of the correct timing angle can be avoided through the detachment of the positioning column, and the accuracy of the detection is ensured. In addition, when the timing angle is detected, the highest position on a crank pin of the crankshaft is directly compared with the upper end face of the equal-height block, so that the use of a taper core rod is omitted, and the operation when the timing angle is detected is more convenient.

In foretell a multi-functional utensil of examining that is used for angle in right time and keyway angle on bent axle, the left support on be equipped with the locating hole, the reference column including wear to establish the cylinder in the locating hole, link firmly in the column cap of cylinder right-hand member and link firmly in the threaded rod of cylinder left end, the column cap external diameter is greater than the cylinder external diameter, threaded connection has the nut on the threaded rod.

When detecting the keyway angle on the crank of the right side, pass the locating hole with the cylinder of reference column from the right side left side, then threaded connection nut on the threaded rod that links firmly in the cylinder left end, it is downthehole both to have made the column cap insert right articulate crank pin to slide the reference column like this, can utilize the nut to prevent that the reference column from deviating from left support again, has guaranteed the stability that detects when the reference column can be dismantled with left support and be connected.

In the multifunctional checking fixture for the timing angle and the key groove angle on the crankshaft, the cylinder is sleeved with the spring, and two ends of the spring are respectively propped against the right end face of the left support and the left end face of the column head.

The spring both ends push up respectively on the right-hand member face of left support and the left end face of column cap, and the spring can provide the tension for the reference column, ensures the firm in connection nature between reference column and the left support and can remain throughout inserting the downthehole state of crank pin on the right crank when examining.

In the multifunctional gauge for timing angles and key groove angles on the crankshaft, the multifunctional gauge further comprises a height gauge, and the dial indicator is fixed on the height gauge.

The dial indicator is fixed on the height gauge, the height gauge can be used for enabling the detection head of the dial indicator to be always in a vertical state during detection, and the height gauge can accurately control the height of the dial indicator, so that the detection accuracy is further ensured.

In the multifunctional checking fixture for the timing angle and the key groove angle on the crankshaft, the right end of the right support is fixedly connected with the support, the support is fixedly provided with the air cylinder, and the piston rod of the air cylinder is connected with the live center.

In the multifunctional checking fixture for the timing angle and the key groove angle on the crankshaft, a through hole is formed in the positioning support in a penetrating mode, the bolt is arranged in the through hole in a sliding mode, the bolt extends out of one port of the through hole, a supporting block is fixed to the surface of the other port of the through hole, an operating rod penetrates through the supporting block and is connected with the bolt, the operating rod is in threaded connection with the supporting block, and a hand wheel is fixed to the end portion of the operating rod.

The operating rod is in threaded connection with the supporting block, the bolt can be pushed outwards or pulled back into the through hole along the threads by rotating the operating rod, and the operation is simple. And the operating lever and supporting shoe threaded connection, when the hand loosens the back, the bolt receives the restriction of screw thread and can not the drunkenness, has guaranteed the accuracy that detects.

In the multifunctional checking fixture for the timing angle and the key groove angle on the crankshaft, the right side of the positioning support is in threaded connection with the limiting screw, the side part of the bolt is provided with the limiting groove, and the end part of the limiting screw is positioned in the limiting groove. The cooperation of stop screw and spacing groove can prevent that the bolt from deviating from in the through-hole.

Compared with the prior art, this a multi-functional utensil of examining for angle and keyway angle in right time on bent axle can be qualified whether to detect the angle in right time and can detect the keyway angle is qualified whether, has richened the function of examining the utensil well, has improved the suitability, has reduced manufacturing cost. In addition, the positioning column is detachably connected with the left support, so that the interference caused by the detection of the correct timing angle can be avoided through the detachment of the positioning column, and the accuracy of the detection is ensured. In addition, when the timing angle is detected, the highest position on a crank pin of the crankshaft is directly compared with the upper end face of the equal-height block, so that the use of a taper core rod is omitted, and the operation when the timing angle is detected is more convenient.

Drawings

FIG. 1 is a schematic diagram of the multifunctional checking fixture for detecting the timing angle on the crankshaft and the key slot angle.

FIG. 2 is a top cross sectional view of the multifunctional gauge for detecting timing angles and key groove angles on a crankshaft.

FIG. 3 is a top cross sectional view of the multifunctional checking fixture for timing angles and key groove angles on a crankshaft for detecting key groove angles.

FIG. 4 is a schematic representation of the height of a plug gauge as measured by a dial gauge.

In the figure, 1, a bottom plate; 2. a left support; 2a, positioning holes; 3. a right support; 4. positioning a support; 5. fixing a center; 6. a live center; 7. a bolt; 8. equal-height blocks; 9. a positioning column; 9a, a column body; 9b, column cap; 9c, a threaded rod; 10. a plug gauge; 11. a nut; 12. a spring; 13. a height gauge; 14. a dial indicator; 15. a support; 16. a cylinder; 17. a support block; 18. an operating lever; 19. a hand wheel; 20. a limit screw; 21. a left crank; 22. a crank pin; 23. a timing gear; 24. a right crank; 24a, a crank pin hole; 24b, key way.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1-4, the multifunctional checking fixture for the timing angle and the key groove angle on the crankshaft comprises a height gauge 13, a dial indicator 14 fixed on the height gauge 13, a bottom plate 1, a left support 2 and a right support 3 both fixed on the bottom plate 1, a fixed center 5 fixed on the left support 2, and a live center 6 arranged coaxially with the fixed center 5 and slidably arranged on the right support 3. The right end of the right support 3 is fixedly connected with a support 15, an air cylinder 16 is fixed on the support 15, a piston rod of the air cylinder 16 is fixed with the live center 6, and the piston rod of the air cylinder 16 can stretch and retract to drive the live center 6 to be pushed out or pulled back.

As shown in fig. 1 and 2, a positioning support 4 is further fixed on the bottom plate 1, and the left support 2 and the right support 3 are located on the same side of the positioning support 4. The positioning support 4 is provided with a bolt 7 in a sliding mode along the horizontal direction, the sliding direction of the bolt 7 is perpendicular to the axis of the fixed center 5, and the end portion of the bolt 7 can be inserted into a corresponding tooth groove of a timing gear 23 on the left crank 21. The bottom plate 1 is fixedly connected with an equal-height block 8 corresponding to the highest position of a crank pin 22 fixed on a left crank 21.

As shown in fig. 2, specifically, a through hole is formed through the positioning support 4, the plug pin 7 is slidably disposed in the through hole, the plug pin 7 extends out of one port of the through hole, a support block 17 is fixed on a surface where the other port of the through hole is located, an operating rod 18 passes through the support block 17 and is connected with the plug pin 7, the operating rod 18 is in threaded connection with the support block 17, and a hand wheel 19 is fixed at an end of the operating rod 18. The right side of the positioning support 4 is in threaded connection with a limiting screw 20, the side part of the bolt 7 is provided with a limiting groove, and the end part of the limiting screw 20 is positioned in the limiting groove.

As shown in fig. 3, the left support 2 is detachably connected with a positioning column 9 capable of being inserted into a crank pin hole 24a of the right crank 24, the positioning column 9 and the plug pin 7 are located at two sides of the positioning point 5, and the positioning column 9 and the positioning point 5 are arranged in parallel. Wherein, be equipped with locating hole 2a on the left support 2, reference column 9 is including wearing to establish cylinder 9a in locating hole 2a, the column cap 9b of linking firmly in cylinder 9a right-hand member and link firmly in the threaded rod 9c of cylinder 9a left end, and column cap 9b external diameter is greater than cylinder 9a external diameter, and threaded connection has nut 11 on the threaded rod 9 c. The end of the stud 9b is tapered to provide a guide for the stud 9b to be inserted smoothly into the crank pin hole 24a of the right crank 24. The column 9a is sleeved with a spring 12, and two ends of the spring 12 respectively prop against the right end face of the left support 2 and the left end face of the column head 9 b. The multifunctional checking fixture further comprises a plug gauge 10 which can be inserted into a key groove 24b on the right crank 24, wherein the plug gauge 10 is specifically in a long flat plate shape.

The crankshafts basically comprise a left crank 21, a right crank 24 and a crank pin 22 connected between the left crank 21 and the right crank 24, wherein the left crank 21 is fixed with a timing gear 23 according to actual needs, and a timing angle is formed between the timing gear 23 and the crank pin 22; the right crank 24 is provided with a key slot 24b according to actual needs, and the key slot 24b and the crank pin 22 have a key slot angle therebetween. No matter the angle of timing or the angle of key groove, all play very important effect when the bent axle is worked, therefore angle of timing and key groove angle accord with the design requirement crucial, all need carry out special measuring earlier before accomplishing the equipment and become the bent axle.

As shown in fig. 1 and 2, when detecting the timing angle on the left crank 21, the positioning column 9 is detached from the left support 2 to avoid interference, and then the central hole of one end of the left crank 21, to which the crank pin 22 and the timing gear 23 are fixed, is matched with the positioning tip 5, and the live center 6 is controlled to be pressed against the central hole of the other end of the left crank 21. After the left crank 21 is clamped, the end part of the control bolt 7 is inserted into a corresponding tooth groove on the outer side of the timing gear 23 on the left crank 21, then the dial indicator 14 is moved to measure the height difference between the upper end surface of the equal-height block 8 and the highest position of the crank pin 22 fixed on the left crank 21, and then the angle difference is converted, so that whether the timing angle of the detected timing gear 23 is qualified or not is judged.

As shown in fig. 3 and 4, when detecting the key groove angle of the right crank 24, the positioning post 9 is connected to the left support 2, and then the positioning post 9 is inserted into the crank pin hole 24a of the right crank 24 while being pressed against both ends of the right crank 24 by the positioning center 5 and the live center 6. Then, one end of the plug gauge 10 is inserted into the key groove 24b of the right crank 24, and finally the dial indicator 14 is moved to measure the height difference from the end of the plug gauge 10 inserted into the key groove 24b to the other end, and then the angle difference is converted, thereby judging whether the detected key groove angle is qualified.

Whether this multi-functional utensil can be qualified to the timing angle of timing gear 23 on left crank 21 detects and can detect the keyway angle on right crank 24 is qualified, has richened the function of examining the utensil well, has improved the suitability, has reduced manufacturing cost. In addition, the positioning column 9 is detachably connected with the left support 2, so that the detection of the correct timing angle can be prevented from interfering through the detachment of the positioning column 9, and the detection accuracy is guaranteed.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A multifunctional checking fixture for timing angles and key groove angles on a crankshaft comprises a dial indicator (14), a bottom plate (1), a left support (2), a right support (3) and a positioning support (4) which are all fixed on the bottom plate (1), wherein a fixed center (5) is fixed on the left support (2), a live center (6) which is coaxial with the fixed center (5) is slidably arranged on the right support (3), the left support (2) and the right support (3) are positioned on the same side of the positioning support (4), and the multifunctional checking fixture is characterized in that a bolt (7) is slidably arranged on the positioning support (4) along the horizontal direction, the sliding direction of the bolt (7) is vertical to the axis of the fixed center (5), the end part of the bolt (7) can be inserted into a corresponding tooth groove of a timing gear (23) on a left crank (21), and an equal-height block (8) which corresponds to the highest position of a crank pin (22) fixed on the left crank (21) is fixedly connected on the bottom plate (1, can dismantle on left support (2) and be connected with reference column (9) that can insert in crank pinhole (24a) on right crank (24), reference column (9) and bolt (7) are located the both sides of centering point (5) and reference column (9) and centering point (5) parallel arrangement, and this multi-functional utensil of examining still includes plug gauge (10) that can insert in keyway (24b) on right crank (24).

2. The multifunctional checking fixture for the timing angle and the key groove angle on the crankshaft as claimed in claim 1, wherein the left support (2) is provided with a positioning hole (2a), the positioning column (9) comprises a column body (9a) penetrating through the positioning hole (2a), a column head (9b) fixedly connected to the right end of the column body (9a) and a threaded rod (9c) fixedly connected to the left end of the column body (9a), the outer diameter of the column head (9b) is larger than that of the column body (9a), and a nut (11) is in threaded connection with the threaded rod (9 c).

3. The multifunctional checking fixture for the timing angle and the key slot angle on the crankshaft as claimed in claim 2, characterized in that the cylinder (9a) is sleeved with a spring (12), and two ends of the spring (12) respectively abut against the right end face of the left support (2) and the left end face of the stud (9 b).

4. The multifunctional checking fixture for the timing angle and the key groove angle on the crankshaft as claimed in claim 1, 2 or 3, is characterized by further comprising a height gauge (13), wherein the dial indicator (14) is fixed on the height gauge (13).

5. The multifunctional checking fixture for the timing angle and the key groove angle on the crankshaft as claimed in claim 1, 2 or 3, wherein the right end of the right support (3) is fixedly connected with a support (15), an air cylinder (16) is fixed on the support (15), and a piston rod of the air cylinder (16) is connected with the live center (6).

6. The multifunctional checking fixture for the timing angle and the key slot angle on the crankshaft as claimed in claim 1, 2 or 3, wherein a through hole is formed in the positioning support (4) in a penetrating manner, the bolt (7) is slidably arranged in the through hole, one end port of the bolt (7) extends out of the through hole, a support block (17) is fixed on the surface where the other end port of the through hole is located, an operating rod (18) penetrates through the support block (17) and is connected with the bolt (7), the operating rod (18) is in threaded connection with the support block (17), and a hand wheel (19) is fixed at the end of the operating rod (18).

7. The multifunctional checking fixture for the timing angle and the key slot angle on the crankshaft as claimed in claim 6, characterized in that a limiting screw (20) is in threaded connection with the right side of the positioning support (4), a limiting groove is formed in the side of the plug pin (7), and the end of the limiting screw (20) is located in the limiting groove.