CN109540358B - Interference heat-assembly double-stage cone pulley torque detection device and detection method thereof - Google Patents
Interference heat-assembly double-stage cone pulley torque detection device and detection method thereof Download PDFInfo
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- CN109540358B CN109540358B CN201811417893.4A CN201811417893A CN109540358B CN 109540358 B CN109540358 B CN 109540358B CN 201811417893 A CN201811417893 A CN 201811417893A CN 109540358 B CN109540358 B CN 109540358B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention relates to the technical field of manufacturing of double-stage cone pulleys and discloses an interference heat-assembled double-stage cone pulley torque detection device and a detection method thereof. The interference heat-assembled double-stage cone pulley torque detection device is provided with a base component, a double-stage cone pulley positioning component, a phase detection component and a torsion component, and the base component, the double-stage cone pulley positioning component, the phase detection component and the torsion component are matched with each other to ensure the detection of the initial phase of the double-stage cone pulley, the torque loading and the phase detection after the torque loading, and the change value of the phase of the two gears after the torque loading is detected, so that whether the double-stage cone pulley can meet the design requirement or not is judged, and the whole device and the detection method thereof have lower cost and higher detection efficiency.
Description
Technical Field
The invention relates to the technical field of manufacturing of double-stage cone pulleys, in particular to an interference heat-assembled double-stage cone pulley torque detection device and a detection method thereof.
Background
The overhead of engine camshaft can shorten the distance between camshaft and the valve, and it has omitted tappet and tappet of valve to simplified the drive mechanism between camshaft to the valve, made the compact structure of engine, can reduce the quality of whole system reciprocating motion, improved transmission efficiency, reduced the transmission noise under the high-speed operation. Therefore, the use of overhead camshafts is becoming increasingly widespread.
The overhead camshaft shortens the distance to the valve, but increases the distance between the camshaft and the crankshaft. Therefore, in order to shorten the transmission chain and reduce the moment of inertia, the application of the double-stage cone pulley in the gear train of the engine becomes a good choice, and the application of the double-stage cone pulley is also becoming wider and wider.
The two-stage cone pulley generally adopts a structure of large interference connection of a large gear and a small gear, so that certain torque can be born, and certain preset torque can be born by interference fit. Because the factors influencing the magnitude of the interference torque are more, how to quickly and conveniently detect the actual torque value which can be born by the two-stage cone pulley after the hot-set is completed on a processing site is a difficult problem that whether the actual torque value reaches the preset torque or not is qualified.
Disclosure of Invention
The invention aims to provide a low-cost and high-efficiency interference heat-mounted double-stage cone pulley torque detection device.
In order to achieve the above purpose, the interference heat-assembled two-stage cone pulley torque detection device comprises a base component, a two-stage cone pulley positioning component, a phase detection component and a torsion component, wherein the two-stage cone pulley positioning component, the phase detection component and the torsion component are fixed on the base component, the phase detection component is arranged on one side of the two-stage cone pulley positioning component and used for detecting the phase of a two-stage cone pulley fixed on the two-stage cone pulley positioning component, and the torsion component is used for fixing the two-stage cone pulley after the phase detection component detects the phase and applying preset torque.
As a preferable scheme, the two-stage cone pulley positioning assembly comprises a second supporting ring for supporting the lower end face of the two-stage cone pulley, a second mandrel axially penetrating through the central hole of the two-stage cone pulley and a gasket for pressing the upper end face of the two-stage cone pulley, wherein the second supporting ring is fixed on the foundation assembly, and the second supporting ring, the second mandrel and the gasket are coaxially arranged.
As the preferred scheme, doublestage cone pulley positioning assembly still includes cotter seat, first locating pin, locating pin bush, first spring and handle, the cotter seat is fixed on the basis subassembly and be located one side of second dabber, first locating pin movably sets up in the locating pinhole of cotter seat, the axis of first locating pin just is just fixed the epaxial doublestage cone pulley gear of second dabber is perpendicular and pass through the axis of second dabber, the locating pin bush is fixed the outside of cotter seat will overlap and establish first spring on the cotter seat is in first locating pin with between the locating pin bush and place in the locating pinhole of cotter seat, the handle is fixed the end of first locating pin.
As a preferable scheme, the phase detection assembly comprises a movable gauge stand, a dial indicator, a flat key, a replaceable measuring head, a swinging rod, a fourth locating pin, a cover plate, a stop screw, a limiting block and a second spring; the bottom surface of the movable gauge stand is provided with a key slot sleeved on a flat key fixed on the bottom plate, the flat key is arranged in the key slot arranged according to the relative angle between the tooth slots of the big gear and the small gear of the two-stage cone pulley, the movable gauge stand is provided with a swing rod slot for placing the swing rod, and the upper end and the lower end of the fourth locating pin are respectively inserted into the holes of the movable gauge stand and the swing rod so that the swing rod can rotate around the fourth locating pin; the second spring and the stop screw are respectively arranged at two sides of a swing rod groove of the movable gauge stand so that the swing rod and the flat key have the same direction through adjusting the stop screw; the front end of the swing rod is tightly pressed against the replaceable measuring head through an eighth screw, and the replaceable measuring head stretches into a corresponding tooth slot on a pinion of the double-stage cone pulley; the dial indicator is arranged on the side surface of the movable gauge stand and is abutted against the side surface of the swinging rod so as to measure the swinging offset of the swinging rod around the fourth locating pin; the cover plate is fixed above the movable gauge stand.
As the preferred scheme, torsion subassembly includes first support ring, ring gear, first dabber, lid, cylindric lock, ring gear and applys the torque wrench of predetermineeing moment of torsion, first support ring is fixed support the lower terminal surface of doublestage cone pulley on the basis subassembly, first dabber passes the centre bore of doublestage cone pulley, the ring gear is fixed on the first support ring and internal tooth and the big gear engagement of doublestage cone pulley, the ring gear with the lid is fixed, the internal tooth and the pinion engagement of doublestage cone pulley of ring gear, the lid is arranged in the pinion up end, torque wrench is connected to the lid.
Preferably, the foundation assembly comprises a bracket fixed on the ground through anchor screws and a bottom plate fixed on the bracket through fasteners.
The invention aims to provide a detection method which is low in cost and high in efficiency and adopts an interference hot-mounted double-stage cone pulley torque detection device.
In order to achieve the above purpose, the detection method adopting the interference heat-assembled two-stage cone pulley torque detection device designed by the invention comprises the following steps:
a) Positioning the detected double-stage cone pulley on the double-stage cone pulley positioning assembly, and detecting the phase offset of the detected double-stage cone pulley by using the phase detection assembly;
b) Marking radial marks penetrating through the whole radius on the detected double-stage cone pulley, and inserting tooth socket marks of the large gear tooth sockets of the detected double-stage cone pulley into the double-stage cone pulley positioning assembly;
c) Removing the detected two-stage cone pulley from the two-stage cone pulley positioning assembly;
d) Mounting a detected double-stage cone pulley on the torsion assembly for positioning;
e) Applying a preset torque to the torsion assembly;
f) After the double-stage cone pulley with the torque applied is detached from the torsion assembly, judging whether the radial mark is misplaced, if so, judging that the detected double-stage cone pulley is unqualified, and if not, turning to the step g);
g) Repositioning the double-stage cone pulley subjected to torque on the double-stage cone pulley positioning assembly, inserting the double-stage cone pulley positioning assembly into a tooth slot marked by the tooth slot mark, and detecting the phase offset of the double-stage cone pulley subjected to torque by using the phase detection assembly;
h) Judging whether the change of the phase offset obtained in the step a) exceeds the requirement according to the phase offset obtained in the step g).
In the step a) and the step g), the detected double-stage cone pulley is placed on the double-stage cone pulley positioning assembly in a way that a large gear faces upwards, the lower end face of the detected double-stage cone pulley is supported on a second supporting ring of the double-stage cone pulley, a central hole of the detected double-stage cone pulley axially penetrates through a second mandrel of the double-stage cone pulley, the upper end face of the detected double-stage cone pulley is pressed by a gasket of the double-stage cone pulley positioning assembly, and a tooth socket of the large gear of the detected double-stage cone pulley is inserted into a first positioning pin of the double-stage cone pulley positioning assembly; and moving a movable gauge stand of the phase detection assembly to enable the replaceable measuring head to be inserted into a pinion tooth socket of the detected two-stage cone pulley, and detecting the phase angle by using a dial indicator.
Preferably, in the step d), the detected double-stage cone pulley is positioned with the outer circle of the first mandrel of the torsion assembly and the upper end face of the first support ring in a manner that a pinion is upward, the inner teeth of the toothed ring fixed on the first support ring are meshed with the large gear of the detected double-stage cone pulley, the inner teeth of the small gear ring fixed with the cover arranged on the upper end face of the pinion are meshed with the pinion of the detected double-stage cone pulley, and a torque wrench connected to the cover applies preset torque to the cover.
Preferably, in the step h), if the difference between the phase offset obtained in the step g) and the phase offset obtained in the step a) exceeds a required range, the detected two-stage step pulley is determined to be failed; otherwise, the detected double-stage cone pulley is judged to be qualified.
The beneficial effects of the invention are as follows: the interference heat-assembly double-stage cone pulley torque detection device is provided with a base component, a double-stage cone pulley positioning component, a phase detection component and a torsion component, and the base component, the double-stage cone pulley positioning component, the double-stage cone pulley phase detection component and the torsion component are matched with each other to ensure the positioning, the initial position determination, the initial phase detection, the torque loading and the phase detection after the torque loading of the double-stage cone pulley.
Drawings
Fig. 1 is a partial cross-sectional view of an interference heat-pack dual-stage cone pulley torque detection device in accordance with a preferred embodiment of the present invention.
Fig. 2 is a top view of the interference heat-pack dual-stage cone pulley torque detection device of fig. 1.
FIG. 3 is an enlarged view of the tooth slot positioning portion of the dual stage cone pulley positioning assembly of FIG. 1.
FIG. 4 is an enlarged view of the tooth slot positioning portion of the dual stage cone pulley positioning assembly of FIG. 2.
Fig. 5 is an enlarged view of the second detent pin of fig. 3.
Fig. 6 is an enlarged view of the phase detection assembly of fig. 2.
Fig. 7 is a top view of a dual-stage cone pulley when the interference heat-pack dual-stage cone pulley torque detection device of fig. 1 is used for detection.
FIG. 8 is a front view of the dual stage cone pulley of FIG. 7.
The reference numerals of the components in the drawings are as follows: the anchor screw 1, the nut 2, the first screw 3, the first support ring 4, the toothed ring 5, the second screw 6, the third screw 7, the first mandrel 8, the cover 9, the cylindrical pin 10, the small toothed ring 11, the bottom plate 12, the second support ring 13, the second mandrel 14, the fourth screw 15, the fifth screw 16, the washer 17, the pin socket 19, the first spring 20, the locating pin bushing 21, the cylindrical pin 22, the first locating pin 23 (wherein the pin head section 231, the spring section 232, the cylindrical pin hole 233, the pin tail section 234), the handle 24, the mobile gauge stand 25, the eye screw 26, the sixth screw 27, the second locating pin 28, the seventh screw 29, the flat key 30, the exchangeable head 31, the slotted countersunk screw 32, the eighth screw 33, the swing link 34, the cover plate 35, the second slotted countersunk screw 36, the third locating pin 37, the fourth locating pin 38, the dial 39, the plug 40, the flat brake screw 41, the second spring 42, the stop screw 43, the ninth screw 44, the fifth locating pin 45, and the bracket 46; base assembly 50, dual stage cone pulley assembly 60, phase detection assembly 70, and torsion assembly 80.
Detailed Description
The invention will now be described in further detail with reference to the drawings and to specific examples.
Referring to fig. 1 and 2, which are schematic structural diagrams of an interference heat-assembled two-stage cone pulley torque detecting device according to a preferred embodiment of the present invention, the interference heat-assembled two-stage cone pulley torque detecting device includes a base assembly 50, a two-stage cone pulley positioning assembly 60, a phase detecting assembly 70 and a torsion assembly 80, wherein the two-stage cone pulley positioning assembly 60, the phase detecting assembly 70 and the torsion assembly 80 are fixed on the base assembly 50, the phase detecting assembly 70 is disposed on one side of the two-stage cone pulley positioning assembly 60 to detect the phase of a two-stage cone pulley fixed on the two-stage cone pulley positioning assembly 60, and the torsion assembly 80 is used for fixing the two-stage cone pulley and applying torsion according to a preset torque.
The base assembly 50 includes the bracket 46, the base plate 12, the anchor screws 1, and other fasteners (nuts 2, first screws 3) as a fixed foundation for the entire inspection device. The bracket 46 is fixed on the ground by the anchor screw 1, and the bottom plate 12 is fixed on the bracket 46 by the nut 2 and the first screw 3, and is used as the installation plane of the two-stage cone pulley positioning assembly 60, the phase detection assembly 70 and the torsion assembly 80. Eye screws 26 are mounted on both sides of the base plate 12.
The two-stage cone pulley positioning assembly 60 comprises a second supporting ring 13, a second mandrel 14 and a gasket 17 which are coaxially arranged, wherein the second supporting ring 13 and the second mandrel 14 are fixed on the bottom plate 12 through fourth screws 15, and the two-stage cone pulley is centered. The two-stage cone pulley is sleeved on the second mandrel 14 in an axial direction in a downward pinion mode and is arranged on the second supporting ring 13, the gasket 17 is arranged on the upper end face of the two-stage cone pulley, and the gasket 17 is pressed by the fifth screw 16, so that the height and centering of the two-stage cone pulley and the reference are determined.
Referring to fig. 3 and 4 in combination, the dual-stage cone pulley positioning assembly 60 further includes a pin seat 19, a first positioning pin 23, a positioning pin bushing 21, a cylindrical pin 22, a first spring 20 and a handle 24 for positioning the tooth slot of the dual-stage cone pulley. A pin boss 19 is fixed to the base plate 12 and is located on one side of the second spindle 14. The first positioning pin 23 is movably arranged in a positioning pin hole of the pin seat 19, and is vertical to the double-stage cone pulley and passes through the axis of the second mandrel 14. The cylindrical pin 22 is inserted into a hole in the first positioning pin 23. The positioning pin bushing 21 is fixed on the outer side of the pin seat 19 by a seventh screw 29, seals the first spring 20 sleeved on the first positioning pin 23 between the first positioning pin 23 and the positioning pin bushing 21, and is placed in the positioning pin hole of the pin seat 19. The first positioning pin 23 is inserted into the tooth slot of the double-stage cone pulley large gear under the action of the spring force of the first spring 20, and the phase of the gear is determined. At this time, the cylindrical pin 22 falls into the limit groove of the positioning pin bushing 21. When the dual stage cone pulley needs to be removed, the first positioning pin 23 is pulled outwards by the handle 24, and the first positioning pin 23 is separated from the tooth slot of the gear. At this time, the cylindrical pin 22 falls into the outer end face of the dowel bush 21. The first spring 20 is a cylindrical compression spring.
Referring to fig. 5, the first positioning pin 23 includes a pin head section 231, a spring section 232, and a pin tail section 234 in sequence along the axial direction. The front end of the pin head section 231 is in a truncated cone shape, the central angle of a cone where the truncated cone is located is matched with the tooth groove angle of the large gear, and the rear end of the pin head section 231 is a cylinder with the diameter larger than the outer diameter of the first spring 20. The spring section 232 is a cylinder with a diameter smaller than that of the first spring 20, the first spring 20 is sleeved on the spring section 232, one end of the first spring is stopped by the rear end face of the pin head section 231, and the other end of the first spring is stopped by the front end face of the positioning pin bushing 21. The rear section of the spring section 232 is provided with a cylindrical pin hole 233 perpendicular to the axial direction, and the cylindrical pin 22 vertically passes through and is fixed in the cylindrical pin hole 233. The two ends of the cylindrical pin 22 exceed the first positioning pin 23 and can be positioned in a linear limiting groove which is formed forward from the rear end surface with the positioning pin bushing 21. The pin tail section 234 is a threaded rod section for threaded connection with the handle 24.
The phase detection assembly 70 includes a movable gauge stand 25, a dial indicator 39, a flat key 30, a replaceable gauge head 31, a swing link 34, a cover 35, a stop screw 43, a stopper, and a second spring 42. The phase detection assembly has two functions: firstly, detecting the offset (phase offset) between one side of one tooth of the double-stage cone pulley pinion and the first positioning pin 23 for positioning the tooth socket of the double-stage cone pulley in an initial state (before torsion); next, after the large gear and the small gear of the two-stage cone pulley are twisted by the rated torque, the offset (phase offset) between one side of the same tooth of the small gear and the first positioning pin 23 is detected, and whether the difference between the two offsets is within the required range is determined. The bottom plate 12 is provided with a key slot and a pin hole according to the relative angle between the tooth slots of the large gear and the small gear of the double-stage cone pulley. The flat key 30 is mounted to the base plate 12 at a keyway by a second slotted countersunk head screw 36. The upper and lower ends of the third positioning pin 37 are respectively inserted into the bottom plate 12 and the movable gauge stand 25, and the movable gauge stand 25 is fixed on the bottom plate 12. The bottom surface of the movable gauge stand 25 is also provided with a key slot, and the key slot of the movable gauge stand 25 is sleeved on the flat key 30. A swing rod groove and a positioning pin hole for placing the swing rod 34 are formed above the movable gauge stand 25, and the swing rod 34 is arranged in the swing rod groove. The upper and lower ends of the fourth positioning pin 38 are respectively inserted into holes of the movable gauge stand 25 and the swing link 34, so that the swing link 34 can rotate (swing) around the fourth positioning pin 38. The two sides of the swing rod groove of the movable gauge stand 25 are respectively provided with a mounting hole of a second spring 42 and a mounting of a stop screw 43, and the outer side of the second spring 42 is mounted and positioned by a screw plug 40. The swing link 34 can be maintained in the same direction as the flat key 30 by adjusting the movement of the set screw 43. The front end of the swing rod 34 is provided with a pin hole, the replaceable measuring head 31 is arranged in the pin hole along the axial direction of the swing rod 34, and the replaceable measuring head 31 extends into a corresponding tooth socket on the pinion of the double-stage cone pulley. A threaded hole is formed in one side surface of the front end of the swing rod 34, an eighth screw 33 is screwed into the threaded hole, and the eighth screw 33 is screwed to compress the replaceable measuring head 31. The dial indicator 39 is mounted on the right side surface of the movable gauge stand 25, the dial indicator 39 is fixed by moving the upper flat tail brake screw 41, the measuring head of the dial indicator 39 is abutted against the side surface of one end of the swinging rod 34, and the offset of the swinging rod 34 swinging around the axis of the fourth locating pin 38 is measured. A cover plate 35 is provided over the mobile gauge stand 25 and is secured by a first slotted countersunk head screw 32.
The torsion assembly 80 includes the first support ring 4, the toothed ring 5, the first mandrel 8, the cover 9, the cylindrical pin 10, the small ring gear 11, and the fastener (ninth screw 44). The first support ring 4 is fixed to the base plate 12 with a ninth screw 44, and the toothed ring 5 is positioned on the upper end surface of the first support ring 4 with a fifth positioning pin 45. The first mandrel 8 is fixed on the bottom plate 12 by the second screw 6, and before torsion, the two-stage cone pulley is sleeved on the first mandrel 8 in a way that the large gear faces downwards, so that the lower end face of the large gear is arranged on the first support ring 4, and the toothed ring 5 is meshed with the large gear. The combination of pinion 11 and cover 9 is fitted over the pinion so that the pinion meshes with the ring 9. The cover 9 is left with a square hole for connection with a torque wrench. After the installation, the torque required by the design of the double-stage cone pulley is applied through a torque wrench, the torque is transmitted to the pinion through the cover 9 and the small gear ring 11, and the large gear is fixed by the lower gear ring 5, so that the torque loading of the double-stage cone pulley is realized.
The detection method and principle of the interference heat-pack double-stage cone pulley torque detection device are as follows:
a) The detected dual stage cone pulley is positioned on the dual stage cone pulley positioning assembly 60 and the phase offset is detected by the phase detection assembly 70.
The detected double-stage cone pulley is placed on the outer circle of the second mandrel 14 and the upper end face of the second supporting ring 13 in a way that the large gear faces upwards, a gasket 17 is inserted, a fifth screw 16 is screwed down, and a first positioning pin 23 is inserted into one tooth slot P of the double-stage cone pulley large gear.
The movable gauge stand 25 is moved to insert the exchangeable probe 31 into the pinion slot of the detected double-stage cone pulley, and the phase offset is detected by the dial indicator 39.
b) The radial mark R penetrating through the whole radius on the detected double-stage cone pulley and the first positioning pin 23 of the double-stage cone pulley positioning assembly 60 are inserted into the tooth socket mark P of the double-stage cone pulley large gear.
As shown in fig. 7 and 8, a radial mark R penetrating through the whole radius is made on the upper end face of the detected double-stage cone pulley by a marker pen along the radial direction from the center of the circle, and the radial mark R passes through the upper end faces of the large gear and the small gear.
c) The inspected dual stage cone pulley is removed from the dual stage cone pulley positioning assembly 60.
The mobile gauge stand 25 is removed, the first locating pin 23 is released, and the inspected dual-stage cone pulley is removed from the dual-stage cone pulley locating assembly 60.
d) The inspected dual stage cone pulley is mounted to the torsion assembly 80 for positioning.
The detected double-stage cone pulley is positioned with the outer circle of the first mandrel 8 and the upper end surface of the first support ring 4 in a way that the pinion is upward, and the double-stage cone pulley is positioned by putting the third screw 7, the cover 9, the cylindrical pin 10 and the small gear ring 11.
e) A preset torque is applied to the torsion assembly 80.
And after the torque wrench is adjusted to a preset torque value, placing the torque wrench into a square hole connected with the torque wrench on the cover 9, and screwing the cover 9 with the preset torque.
f) The dual stage cone pulley after torque application is removed from the torsion assembly 80 and a determination is made as to whether the radial mark R is misaligned.
If the original radial mark R penetrating through the whole end surface is misplaced on the end surfaces of the double-stage cone pulley large gear and the pinion after torque is applied, the detected double-stage cone pulley is unqualified, and the detection is finished.
If the radial mark R passing through the whole end face is not misplaced, the next step is carried out.
g) The torqued dual stage cone is repositioned on the dual stage cone positioning assembly 60 and the phase offset of the torqued dual stage cone is detected by the phase detection assembly 70.
The double-stage cone pulley after torque is applied is placed on the outer circle of the second mandrel 14 and the upper end face of the second supporting ring 13 again, a washer 17 is inserted, a fifth screw 16 is screwed, and a first positioning pin 23 is inserted into a tooth groove mark P of the double-stage cone pulley large gear (note that the tooth groove contacted with the first positioning pin 23 is necessarily the tooth groove mark P).
The movable gauge stand 25 is adjusted so that the exchangeable probe 31 is inserted into the pinion slot of the double stage cone pulley to be inspected, and the indication value (phase shift amount) of the dial indicator 39 is observed.
h) Judging whether the change of the offset obtained in the step a) exceeds the requirement according to the offset obtained in the step g).
If the change (difference in phase offset) between the indication value of the dial indicator 39 obtained in step g) and the indication value of the dial indicator obtained in step a) exceeds the required range, namely, the detected two-stage cone pulley is judged to be unqualified; otherwise, the detected double-stage cone pulley is judged to be qualified.
The interference heat-assembled double-stage cone pulley torque detection device is provided with a base component, a double-stage cone pulley positioning component, a phase detection component and a torsion component, the key devices are mutually matched to ensure the positioning of the double-stage cone pulley, the initial position determination, the initial phase detection, the torque loading and the phase detection after the torque loading, the phase detection between two gears of the double-stage cone pulley is firstly carried out, then the torque required by the design of the double-stage cone pulley is loaded, and finally the change value of the phase of the two gears after the torque loading is detected, so that whether the double-stage cone pulley can meet the design requirement is judged.
The interference heat-assembly double-stage cone pulley torque detection device and the detection method thereof can be installed and applied to a heat assembly line of a double-stage gear formed by heat assembly, when the interference heat assembly of the double-stage cone pulley is completed, the gear is placed on the detection device, the gear is twisted through rated torque, and if the gear can resist required torque, the double-stage cone pulley is qualified.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (6)
1. An interference heat dress doublestage cone pulley moment of torsion detection device, its characterized in that: the device comprises a base assembly (50), a two-stage cone pulley positioning assembly (60), a phase detection assembly (70) and a torsion assembly (80), wherein the two-stage cone pulley positioning assembly (60) is fixed on the base assembly (50), the phase detection assembly (70) is arranged on one side of the two-stage cone pulley positioning assembly (60) and used for detecting the phase of a two-stage cone pulley fixed on the two-stage cone pulley positioning assembly (60), and the torsion assembly (80) is fixed on the two-stage cone pulley after the phase detection assembly (70) detects the phase and applies preset torque;
the two-stage cone pulley positioning assembly (60) comprises a second supporting ring (13) for supporting the lower end surface of the two-stage cone pulley, a second mandrel (14) axially penetrating through the central hole of the two-stage cone pulley and a gasket (17) for pressing the upper end surface of the two-stage cone pulley, the second supporting ring (13) is fixed on the base assembly (50), and the second supporting ring (13), the second mandrel (14) and the gasket (17) are coaxially arranged;
the two-stage cone pulley positioning assembly (60) further comprises a pin seat (19), a first positioning pin (23), a positioning pin bushing (21), a first spring (20) and a handle (24), wherein the pin seat (19) is fixed on the base assembly (50) and is positioned on one side of the second mandrel (14), the first positioning pin (23) is movably arranged in a positioning pin hole of the pin seat (19), the axis of the first positioning pin (23) is opposite to the axis of a two-stage cone pulley gear fixed on the second mandrel (14) and is perpendicular to and passes through the axis of the second mandrel (14), the positioning pin bushing (21) is fixed on the outer side of the pin seat (19), the first spring (20) sleeved on the first positioning pin (23) is sealed between the first positioning pin (23) and the positioning pin bushing (21) and is arranged in the positioning pin hole of the pin seat (19), and the handle (24) is fixed at the tail end of the first positioning pin (23);
the phase detection assembly (70) comprises a movable gauge stand (25), a dial indicator (39), a flat key (30), a replaceable measuring head (31), a swinging rod (34), a fourth locating pin (38), a cover plate (35), a stop screw (43), a limiting block and a second spring (42); the bottom surface of the movable gauge stand (25) is provided with a key slot sleeved on a flat key (30) fixed on the bottom plate (12), the flat key (30) is arranged in the key slot arranged according to the relative angle between the tooth slots of a large gear and a small gear of the double-stage cone pulley, the movable gauge stand (25) is provided with a swing rod slot for placing the swing rod (34), and the upper end and the lower end of a fourth locating pin (38) are respectively inserted into holes of the movable gauge stand (25) and the swing rod (34) so that the swing rod (34) can rotate around the fourth locating pin (38); the second spring (42) and the stop screw (43) are respectively arranged at two sides of a swing rod groove of the movable gauge stand (25) so that the swing rod (34) and the flat key (30) are in the same direction by adjusting the stop screw (43); the front end of the swing rod (34) is tightly pressed against the replaceable measuring head (31) through an eighth screw (33), and the replaceable measuring head (31) stretches into a corresponding tooth slot on a pinion of the double-stage cone pulley; the dial indicator (39) is arranged on the side surface of the movable gauge stand (25) and is abutted against the side surface of the swinging rod (34) so as to measure the swinging offset of the swinging rod (34) around the fourth locating pin (38); the cover plate (35) is fixed above the movable gauge stand (25);
the torsion assembly (80) comprises a first supporting ring (4), a toothed ring (5), a first mandrel (8), a cover (9), a cylindrical pin (10), a small gear ring (11) and a torque wrench applying preset torque, wherein the first supporting ring (4) is fixed on the base assembly (50) to support the lower end face of the two-stage cone pulley, the first mandrel (8) penetrates through a central hole of the two-stage cone pulley, the toothed ring (5) is fixed on the first supporting ring (4) and is meshed with a large gear of the two-stage cone pulley through inner teeth, the small gear ring (11) is fixed with the cover (9), inner teeth of the small gear ring (11) are meshed with a small gear of the two-stage cone pulley, the cover (9) is arranged on the upper end face of the small gear, and the torque wrench is connected to the cover (9).
2. The interference heat-pack dual-stage cone pulley torque detection device according to claim 1, wherein: the foundation assembly (50) comprises a bracket (46) fixed on the ground through a foundation screw (1) and a bottom plate (12) fixed on the bracket (46) through a fastener.
3. A detection method adopting the interference heat-pack two-stage cone pulley torque detection device according to any one of claims 1 to 2, comprising the steps of:
a) Positioning the detected double-stage cone pulley on the double-stage cone pulley positioning assembly (60), and detecting the phase offset of the detected double-stage cone pulley by using the phase detection assembly (70);
b) Marking radial marks (R) penetrating through the whole radius on the detected double-stage cone pulley, and inserting tooth socket marks (P) of the large gear tooth sockets of the detected double-stage cone pulley into the double-stage cone pulley positioning assembly (60);
c) Removing the detected dual-stage cone pulley from the dual-stage cone pulley positioning assembly (60);
d) Mounting a detected dual stage cone pulley to the torsion assembly (80) in position;
e) -applying a preset torque on the torsion assembly (80);
f) After the double-stage cone pulley with torque applied is detached from the torsion assembly (80), judging whether the radial mark (R) is misplaced, if so, judging that the detected double-stage cone pulley is unqualified, and if not, turning to the step g);
g) Repositioning the torqued double-stage cone pulley to a tooth socket marked by the tooth socket mark (P) on the double-stage cone pulley positioning assembly (60) for positioning, and detecting the phase offset of the torqued double-stage cone pulley by the phase detection assembly (70);
h) Judging whether the change of the phase offset obtained in the step a) exceeds the requirement according to the phase offset obtained in the step g).
4. The detection method of the interference heat-assembled two-stage cone pulley torque detection device according to claim 3, wherein the detection method comprises the following steps of: in the step a) and the step g), a detected double-stage cone pulley is placed on the double-stage cone pulley positioning assembly (60) in a way that a large gear is upwards, the lower end face of the detected double-stage cone pulley is supported on a second supporting ring (13) of the double-stage cone pulley (60), a central hole of the detected double-stage cone pulley axially penetrates through a second mandrel (14) of the double-stage cone pulley (60), the upper end face of the detected double-stage cone pulley is pressed by a gasket (17) of the double-stage cone pulley positioning assembly (60), and a tooth socket of the large gear of the detected double-stage cone pulley is inserted into a first positioning pin (23) of the double-stage cone pulley positioning assembly (60); and moving a movable gauge stand (25) of the phase detection assembly (70) to enable the replaceable gauge head (31) to be inserted into a pinion tooth socket of the detected double-stage cone pulley, and detecting the phase angle by using a dial indicator (39).
5. The detection method of the interference heat-assembled two-stage cone pulley torque detection device according to claim 3, wherein the detection method comprises the following steps of: in the step d), the detected double-stage cone pulley is positioned with the outer circle of a first mandrel (8) of the torsion assembly (80) and the upper end face of a first support ring (4) in a way that a pinion is upwards, the inner teeth of a toothed ring (5) fixed on the first support ring (4) are meshed with the large gear of the detected double-stage cone pulley, the inner teeth of a small gear ring (11) fixed with a cover (9) arranged on the upper end face of the pinion are meshed with the pinion of the detected double-stage cone pulley, and a torque wrench connected to the cover (9) applies preset torque to the cover (9).
6. The detection method of the interference heat-assembled two-stage cone pulley torque detection device according to claim 3, wherein the detection method comprises the following steps of: in the step h), if the difference between the phase offset obtained in the step g) and the phase offset obtained in the step a) exceeds a required range, the detected two-stage cone pulley is judged to be unqualified; otherwise, the detected double-stage cone pulley is judged to be qualified.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1120568A (en) * | 1978-08-29 | 1982-03-23 | Gerhard Stark | Turret machine tool |
| CN209280179U (en) * | 2018-11-26 | 2019-08-20 | 东风汽车有限公司 | Interference hot-charging two-stage cone pulley torque detection device |
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| US7614970B2 (en) * | 2005-07-29 | 2009-11-10 | Deere & Company | Torque sensing assembly having dual stage spring compression for an agricultural machine |
| CN102749161B (en) * | 2011-04-20 | 2014-04-23 | 鸿富锦精密工业（深圳）有限公司 | Torsion testing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1120568A (en) * | 1978-08-29 | 1982-03-23 | Gerhard Stark | Turret machine tool |
| CN209280179U (en) * | 2018-11-26 | 2019-08-20 | 东风汽车有限公司 | Interference hot-charging two-stage cone pulley torque detection device |
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