CN219178463U - Double-arm conical shaft type automobile leaf spring leaf center hole symmetry degree detection device - Google Patents
Double-arm conical shaft type automobile leaf spring leaf center hole symmetry degree detection device Download PDFInfo
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- CN219178463U CN219178463U CN202223467738.8U CN202223467738U CN219178463U CN 219178463 U CN219178463 U CN 219178463U CN 202223467738 U CN202223467738 U CN 202223467738U CN 219178463 U CN219178463 U CN 219178463U
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Abstract
A double-arm conical shaft type automobile leaf spring leaf center hole symmetry detection device relates to a device for detecting the symmetry of an automobile leaf spring leaf center hole. The measuring device is mainly designed for solving the problem that the accuracy of measuring the symmetry degree of the reed center hole by using a vernier caliper is low. The device comprises a lower arm and an upper arm, wherein the upper surface of the lower arm is provided with a first groove, a central cylinder inner hole in the middle of the first groove is a central hole, positioning holes are formed in the ends of the lower arm and the upper arm, an observation hole is formed beside the positioning holes, magnetic steel is arranged in a magnetic steel mounting groove on the lower surface of the upper arm and the lower arm, the upper arm is sleeved on the central cylinder of the lower arm, and a tension spring is connected between the upper arm and the lower arm. The stepped measuring column is installed in the positioning hole, and the conical shaft is inserted into the central hole of the lower arm. The advantage is that measurement accuracy is high.
Description
Technical field:
the utility model relates to a device for detecting the symmetry of a central hole of a leaf spring of an automobile.
The background technology is as follows:
the symmetry degree of the leaf spring center hole of the automobile leaf spring means that the distances between the center of the leaf spring center hole and the side surfaces of the leaf springs on the two sides are equal, and the difference value is within the required error range.
At present, the symmetry degree of a reed center hole is generally measured by adopting a vernier caliper, the requirement of measuring the symmetry degree by adopting the vernier caliper is measured on only 1 cross section, and when the actual side quantity is measured, the cross section is formed by measuring operations at different positions sequentially, so that the conditions of improper cross section positioning, skew caliper, unparallel clamping jaws, small hole measurement by using wide clamping jaws and the like are easily caused by personal factors such as vision, hand feeling, body posture stability of an operator, accurate use method mastery degree of a person during caliper hole measurement and objective factors such as a clearance between a movable rule and a rule body of a caliper structure, and the like, so that the measurement precision is influenced; and the common vernier caliper is relatively difficult to read, and a certain experience skill is needed, so that the measurement accuracy is affected. The measuring efficiency is relatively low, and the method is not suitable for multi-piece detection, large-scale sampling and batch detection, and can not realize quick qualitative detection of mass products.
The utility model comprises the following steps:
the utility model aims to solve the technical problem of providing the double-arm taper shaft type automobile leaf spring central hole symmetry detection device which is high in measurement precision, high in efficiency and convenient to use.
The above object is achieved in that: the device comprises a lower arm and an upper arm, wherein a first concave groove is formed in the middle of the upper surface of the lower arm, a central cylinder extending upwards is arranged in the middle of the first concave groove, an inner hole of the central cylinder is a central hole, the lower arms on two sides of the first concave groove are respectively a lower arm section A and a lower arm section B, first positioning holes are formed in the end parts of the lower arm section A and the lower arm section B respectively, and the distances between the centers of the two first positioning holes and the center of the central hole are equal; the lower surface plane of the lower arm is a self reference plane, and the axes of the central hole and the two positioning holes are perpendicular to the reference plane; the lower arm section A and the lower arm section B beside each first positioning hole are respectively provided with a first observation hole, and the first observation holes are intersected with the circular arcs of the first positioning holes. The lower surfaces of the lower arm section A and the lower arm section B are respectively provided with a magnetic steel installation groove, each magnetic steel installation groove is internally provided with a first magnetic steel, and the lower surfaces of the first magnetic steels and the lower arm are in the same plane.
The upper arm on both sides of the second groove is respectively an upper arm A section and an upper arm B section, the end parts of the upper arm A section and the upper arm B section are respectively provided with a second positioning hole, and the circle centers of the two second positioning holes are equal to the circle center distance of the hole in the center of the groove; the lower surface of the upper arm is a self reference plane, and the axes of the hole in the center of the second groove and the two second positioning holes are perpendicular to the reference plane; and the upper arm section A and the upper arm section B beside each second positioning hole are respectively provided with a second observation hole, and the second observation holes are intersected with the arcs of the second positioning holes. The lower surfaces of the upper arm A section and the upper arm B section are respectively provided with a magnetic steel installation groove, each magnetic steel installation groove is internally provided with a second magnetic steel, and the lower surfaces of the second magnetic steels and the lower surfaces of the upper arms are in the same plane.
The outer wall of the central cylinder is provided with an annular circlip mounting groove, a hole in the center of the second groove of the upper arm is sleeved on the central cylinder of the lower arm, the two are in rotatable minimum clearance fit, the upper surface of the upper arm is positioned below the circlip mounting groove, and the circlip is mounted in the circlip mounting groove; the second groove bottom of the upper arm is provided with a gap with the first groove bottom of the lower arm after the upper arm is connected with the lower arm, and the gap is used for avoiding the requirement that the lower surfaces of the upper arm and the lower arm are on the same horizontal plane, so that oversubscribing interference is formed. The upper arm and the lower arm are connected to approximate an X shape.
A tension spring is connected between the upper arm section A and the lower arm section A, and a tension spring is connected between the upper arm section B and the lower arm section B.
The device also comprises four step measuring columns (namely a step shaft of two steps) and a conical shaft; the four step measuring columns are respectively arranged in the second positioning hole of the upper arm and the first positioning hole of the lower arm in an interference fit manner (the step section with large diameter is arranged below and the step section with small diameter is arranged above), the step section with small diameter of each step measuring column is provided with an annular check ring groove, each annular check ring groove is internally provided with an elastic check ring, and the outer diameter of the elastic check ring is larger than the aperture of the positioning hole, so that the step measuring column can be ensured not to fall off.
The tapered shaft is inserted into the central bore of the lower arm. The conical shaft is respectively provided with a handle section, a cylindrical reference section and a conical section from top to bottom. The cylindrical reference section is coaxial with the axis of the cone section, and the diameter of the large end of the cone section is smaller than that of the cylindrical reference section. The cylindrical reference section is located in the central bore of the lower arm. The large end size of the cone section is larger than the basic size of the measured workpiece hole, and the small end size is smaller than the basic size of the measured workpiece hole.
The utility model has the advantages that: the three-hole axis coplanar symmetrical structure of the upper arm and the lower arm is a basis for realizing a measurement principle and measurement precision, is easy to manufacture with high precision and has good manufacturability; the central grooves of the upper arm and the lower arm enable the upper arm and the lower arm to be mutually embedded, so that the lower surfaces of the upper arm and the lower arm can be simultaneously contacted with a measured workpiece, a reliable measuring and positioning reference plane with a large area is provided, and meanwhile, the size and the weight of the gauge are reduced, and the gauge is more convenient to operate and carry; the magnetic steel is used, so that the detection tool and the detected element are reliably positioned during measurement, are not interfered by force measurement, are not interfered by external force such as inclination, external vibration and the like, and further ensure measurement accuracy; the design of observation hole is used for conveniently observing the contact state of 4 ladder measuring columns and two sides of reed width, and greatly facilitates the observation operation when using the clearance gauge. The tension springs provide a substantially balanced holding force, avoiding instability of hand force, and the series of cone shafts share a measuring main body framework. The upper arm and the lower arm which rotate relatively drive the four ladder measuring columns to form different inscribed widths, thereby being suitable for different measured widths. The number of manufacturing sets of the gauge is greatly reduced, and the cost of the gauge is reduced.
The detection tool can improve the detection efficiency, improve the detection precision, reduce misjudgment, reduce the operation difficulty and reduce the manual labor intensity, is not only suitable for the leaf spring of an automobile, but also can be completely used for the symmetry degree detection of a central hole with a similar structure, and has the property of a general detection tool.
Description of the drawings:
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of another angular configuration of the present utility model;
FIG. 3 is a schematic view of the lower arm structure of the present utility model;
FIG. 4 is a schematic view of the structure of the upper arm of the present utility model;
fig. 5 is a schematic view of the structure of the tapered shaft in the present utility model.
The specific embodiment is as follows:
the utility model is further described below with reference to fig. 1-5;
the device comprises a lower arm 2 and an upper arm 1, wherein a first concave groove 2-1 which is concave downwards is arranged in the middle of the upper surface of the lower arm, a central cylinder 2-2 which extends upwards is arranged in the middle of the first concave groove, an inner hole of the central cylinder is a central hole 2-3, the lower arms on two sides of the first concave groove are respectively a lower arm section A and a lower arm section B, first positioning holes 2-4 are respectively formed in the end parts of the lower arm section A and the lower arm section B, and the distances between the circle centers of the two first positioning holes and the circle center of the central hole are equal; the lower surface plane of the lower arm is a self reference plane, and the axes of the central hole and the two positioning holes are perpendicular to the reference plane; the lower arm section A and the lower arm section B beside each first positioning hole are respectively provided with a first observation hole 2-5, and the first observation holes are intersected with the circular arcs of the first positioning holes. The lower surfaces of the lower arm section A and the lower arm section B are respectively provided with a magnetic steel installation groove, each magnetic steel installation groove is internally provided with a first magnetic steel 2-6, and the lower surfaces of the first magnetic steel and the lower arm are in the same plane.
The lower surface of the upper arm 1 is provided with a second groove 1-1, the center of the second groove is provided with a hole 1-2 which is matched with the cylinder in the center of the lower arm, the upper arms on two sides of the second groove are an upper arm A section and an upper arm B section respectively, the end parts of the upper arm A section and the upper arm B section are respectively provided with a second positioning hole 1-3, and the circle centers of the two second positioning holes are equal to the circle center distance of the hole in the center of the groove; the lower surface of the upper arm is a self reference plane, and the axes of the hole in the center of the second groove and the two second positioning holes are perpendicular to the reference plane; and the upper arm section A and the upper arm section B beside each second positioning hole are respectively provided with a second observation hole 1-4, and the second observation holes are intersected with the circular arcs of the second positioning holes. The lower surfaces of the upper arm section A and the upper arm section B are respectively provided with a magnetic steel installation groove, each magnetic steel installation groove is internally provided with a second magnetic steel 1-5, and the lower surfaces of the second magnetic steels and the lower surfaces of the upper arms are in the same plane.
The outer wall of the central cylinder is provided with an annular circlip mounting groove 2-2-1, a hole in the center of a second groove of the upper arm is sleeved on the central cylinder of the lower arm, the two are in rotatable minimum clearance fit, the upper surface of the upper arm is positioned below the circlip mounting groove, and the circlip 3 is mounted in the circlip mounting groove; the second groove bottom of the upper arm is provided with a gap with the first groove bottom of the lower arm after the upper arm is connected with the lower arm, and the gap is used for avoiding the requirement that the lower surfaces of the upper arm and the lower arm are on the same horizontal plane, so that oversubscribing interference is formed. The upper arm and the lower arm are connected to approximate an X shape.
A tension spring 4 is connected between the upper arm section A and the lower arm section A, and a tension spring is connected between the upper arm section B and the lower arm section B.
The device also comprises four step measuring columns 5 (namely a step shaft of two steps) and a conical shaft 6; the four step measuring columns are respectively arranged in the second positioning hole of the upper arm and the first positioning hole of the lower arm in an interference fit manner (the step section with large diameter is arranged below and the step section with small diameter is arranged above), the step section with small diameter of each step measuring column is provided with an annular check ring groove, each annular check ring groove is internally provided with an elastic check ring, and the outer diameter of the elastic check ring is larger than the aperture of the positioning hole, so that the step measuring column can be ensured not to fall off.
The tapered shaft is inserted into the central bore of the lower arm. The conical shaft is respectively provided with a handle section 6-1, a cylindrical reference section 6-2 and a cone section 6-3 from top to bottom. The cylindrical reference section is coaxial with the axis of the cone section, and the diameter of the large end of the cone section is smaller than that of the cylindrical reference section. The cylindrical reference section is located in the central bore of the lower arm. The large end size of the cone section is larger than the basic size of the measured workpiece hole, and the small end size is smaller than the basic size of the measured workpiece hole.
Because the specifications of the central holes of the tested reeds are different, a plurality of conical shafts are required to be designed, the structure of each shaft is the same, the sizes of the conical sections are different, and the rest parts are completely the same.
The using method comprises the following steps: when in measurement, the upper arm and the lower arm are pulled by hands, so that the central axis of the device is basically aligned with the measured central hole, and the gauge straddles the position of the measured central hole. Under the action of the magnet, the lower surfaces of the upper arm and the lower arm are reliably adsorbed on the surface of the tested workpiece and can be pushed and slid lightly. The taper shaft with corresponding size passes through the central hole of the lower arm, after the small end of the taper section enters the measured central hole, the taper shaft is pushed by proper hand force along the axial direction until the taper surface of the taper section is completely overlapped with the end edge line of the measured hole, at the moment, the taper shaft is already pushed, and the hole-shaft positioning without gaps is realized.
The proper pushing force of the hand to the cone shaft is kept downwards, meanwhile, the hand force for breaking the upper arm and the lower arm is released, the upper arm and the lower arm are folded around the central axis under the pulling force of the two tension springs (or the force of the hand is assisted), and the stepped measuring column is driven to approach to the two side surfaces of the measured width until the stepped measuring column contacts the side surfaces to stop. At this time, the hand is released, and the gauge and the workpiece to be measured keep a stable position state under the action of the tension spring and the magnet.
When the four step measuring columns are completely contacted with the two sides of the reed, the symmetry degree can be judged to be zero. When the step measuring column and the side surface of the reed to be measured are provided with gaps, the size of the gaps is the numerical value of the symmetry degree of the center hole to be measured, and the size of the gaps can be measured by using a feeler gauge.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.
Claims (1)
1. Double-arm conical shaft type automobile leaf spring leaf center hole symmetry detection device comprises a lower arm (2) and an upper arm (1), and is characterized in that: the middle part of the upper surface of the lower arm is provided with a first concave groove (2-1), the middle part of the first concave groove is provided with a central cylinder (2-2) extending upwards, an inner hole of the central cylinder is a central hole (2-3), the lower arms on two sides of the first concave groove are respectively a lower arm section A and a lower arm section B, the end parts of the lower arm section A and the lower arm section B are respectively provided with a first positioning hole (2-4), and the distances between the centers of the two first positioning holes and the center of the central hole are equal; the lower surface plane of the lower arm is a self reference plane, and the axes of the central hole and the two positioning holes are perpendicular to the reference plane; a first observation hole (2-5) is arranged on the lower arm section A and the lower arm section B beside each first positioning hole, and the first observation hole is intersected with the first positioning Kong Yuanhu; the lower surfaces of the lower arm section A and the lower arm section B are respectively provided with a magnetic steel installation groove, each magnetic steel installation groove is internally provided with a first magnetic steel (2-6), and the lower surfaces of the first magnetic steel and the lower arm are on the same plane;
the lower surface of the upper arm (1) is provided with a second groove (1-1), the center of the second groove is provided with a hole (1-2) which is matched with the cylinder in the center of the lower arm, the upper arms on two sides of the second groove are respectively an upper arm A section and an upper arm B section, the end parts of the upper arm A section and the upper arm B section are respectively provided with a second positioning hole (1-3), and the circle center distances of the two second positioning holes are equal to the circle center distance of the hole in the center of the groove; the lower surface of the upper arm is a self reference plane, and the axes of the hole in the center of the second groove and the two second positioning holes are perpendicular to the reference plane; the upper arm section A and the upper arm section B beside each second positioning hole are provided with second observation holes (1-4), and the second observation holes are intersected with the second positioning hole in a circular arc manner; the lower surfaces of the upper arm section A and the upper arm section B are respectively provided with a magnetic steel installation groove, each magnetic steel installation groove is internally provided with a second magnetic steel (1-5), and the lower surfaces of the second magnetic steels and the lower surface of the upper arm are on the same plane;
the outer wall of the central cylinder is provided with an annular elastic retainer ring mounting groove (2-2-1), a hole in the center of the second groove of the upper arm is sleeved on the central cylinder of the lower arm, the two are in rotatable minimum clearance fit, the upper surface of the upper arm is positioned below the elastic retainer ring mounting groove, and the elastic retainer ring (3) is mounted in the elastic retainer ring mounting groove; the bottom of the second groove of the upper arm is provided with a gap with the bottom of the first groove of the lower arm after the upper arm is connected with the lower arm, and the upper arm and the lower arm are connected and approximate to an X shape;
a tension spring (4) is connected between the upper arm section A and the lower arm section A, and a tension spring is connected between the upper arm section B and the lower arm section B;
the device also comprises four step measuring columns (5) and a conical shaft (6); the four step measuring columns are respectively arranged in the second positioning hole of the upper arm and the first positioning hole of the lower arm in an interference fit manner, the step section with small diameter of each step measuring column is provided with an annular check ring groove, and each annular check ring groove is internally provided with an elastic check ring;
the conical shaft is inserted into a central hole of the lower arm, and the conical shaft is respectively provided with a handle section (6-1), a cylindrical reference section (6-2) and a conical section (6-3) from top to bottom; the cylindrical reference section is coaxial with the axis of the cone section, and the diameter of the large end of the cone section is smaller than that of the cylindrical reference section; the cylindrical reference section is located in the central bore of the lower arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223467738.8U CN219178463U (en) | 2022-12-26 | 2022-12-26 | Double-arm conical shaft type automobile leaf spring leaf center hole symmetry degree detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223467738.8U CN219178463U (en) | 2022-12-26 | 2022-12-26 | Double-arm conical shaft type automobile leaf spring leaf center hole symmetry degree detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219178463U true CN219178463U (en) | 2023-06-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223467738.8U Active CN219178463U (en) | 2022-12-26 | 2022-12-26 | Double-arm conical shaft type automobile leaf spring leaf center hole symmetry degree detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219178463U (en) |
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2022
- 2022-12-26 CN CN202223467738.8U patent/CN219178463U/en active Active
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