CN106595447A - Coaxiality detection tool for automobile production - Google Patents

Abstract

The invention discloses a coaxiality detection tool for automobile production, which includes a measuring cylinder and a necking mechanism installed in the measuring cylinder for reducing the inner diameter of the screwing cylinder; the necking mechanism includes a plurality of necking components, each set of The neck assemblies all include a first hinged rod, a second hinged rod and a drive rod. The front end of the first hinged rod is hinged to the side wall of the bar-shaped groove, and the two ends of the hinge shaft of the second hinged rod and the drive rod are embedded in the bar-shaped groove. The guide groove on the side wall of the groove is slidably matched with the screw-in cylinder with a single degree of freedom in the axial direction; when in use, the measuring cylinder fits over the end of the shaft or the end of a large-radius cylinder, and the coaxiality accuracy is detected through the deformation of each cylindrical spring , and the device is especially suitable for the case where the parts are not easy to remove and the small-diameter cylindrical section is located inside the large-diameter cylindrical end. It can penetrate the small-diameter cylindrical section from the large-diameter cylindrical section to improve the detection efficiency.

Description

Coaxiality testing tool for automobile production

technical field

The invention relates to a detection tool for auto parts, in particular to a coaxiality detection tool for automobile production.

Background technique

In the field of automobile manufacturing, in order to ensure the safe use of automobiles after leaving the factory, it is necessary to strictly control the assembly accuracy of the produced automobile parts to ensure the stroke installation of the automobile and reduce the accident rate of the vehicle; and the coaxiality installation of automobile parts Accuracy plays an important role in the driving safety of the vehicle. The two ends of the various transmission shafts of the car are generally installed by setting the journal and the bushing. During the processing, due to the large machining force on the journal, for The journal of machining error is easy to appear because the coaxiality of the shaft itself is not high, which leads to safety problems in later use.

Therefore, in order to solve the above problems, there is a need for a coaxiality detection tool for automobile production, which can quickly detect the coaxiality of the journal and the shaft, and can also detect the coaxiality in a narrow space, and has a simple structure and is easy to use.

Contents of the invention

In view of this, the purpose of the present invention is to overcome the defects in the prior art and provide a coaxiality detection tool for automobile production, which can quickly detect the coaxiality of the journal and the shaft, and can also detect the coaxiality of the narrow space , and the structure is simple and easy to use.

The coaxiality detection tool for automobile production of the present invention includes a measuring cylinder and a necking mechanism installed in the measuring cylinder for reducing the inner diameter of the screw-in cylinder; the inner wall of the measuring cylinder is axially provided with a plurality of circumferentially distributed The bar-shaped groove for installing the necking mechanism, the necking mechanism includes a plurality of necking assemblies with the same structure and the multiple necking assemblies are distributed along the circumferential direction and installed in the corresponding bar-shaped groove, each set of necking assemblies It includes a first hinged rod, a second hinged rod whose front end is hinged to the rear end of the first hinged rod, and a drive rod whose front end is hinged to the rear end of the second hinged rod, and the front end of the first hinged rod is connected to the side wall of the bar-shaped groove Hinged, the two ends of the hinged shaft of the second hinged rod and the driving rod are embedded in the guide groove provided on the side wall of the bar-shaped groove and slide with the screw-in cylinder in a single degree of freedom in the axial direction; the tail end of the bar-shaped groove There are bar-shaped radial through holes distributed in the axial direction, and the rear end of the drive rod is bent radially outward to form a handle that cooperates with the bar-shaped groove with a single degree of freedom. The handle is provided with a handle for pushing the handle forward The front end of the cylindrical spring is fixed on the handle, and the rear end is fixed on the mounting seat at the rear end of the measuring cylinder. The outer circle of the measuring cylinder is provided with a circular scale line, and the cylindrical spring is fixed with an indicator that matches the circular scale line. .

Further, there are five necking assemblies arranged in the circumferential direction.

Further, there are multiple annular scale lines, and the multiple annular scale lines are distributed in parallel along the axial direction.

Further, the indicator is a pointer or a marking point.

The beneficial effects of the present invention are: the coaxiality detection tool for automobile production disclosed by the present invention, when in use, the measuring cylinder fits over the end of the shaft or the end of the large-radius cylinder, and the measuring cylinder is moved axially. During the process of rotation and axial movement, observe the relative position of the indicator on the cylindrical spring and the ring scale line along the axial direction to judge whether the cylindrical spring is deformed, and detect the coaxiality accuracy through the deformation of each cylindrical spring, and this device is especially suitable for parts If it is difficult to remove and the small-diameter cylindrical section is located inside the large-diameter cylindrical end, the small-diameter cylindrical section can be penetrated from the large-diameter cylindrical section to improve the detection efficiency.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment:

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a cross-sectional view of the measuring cylinder of the present invention.

detailed description

Fig. 1 is a schematic structural view of the present invention, and Fig. 2 is a cross-sectional view of a measuring cylinder of the present invention, as shown in the figure, the coaxiality detection tool for automobile production in the present embodiment; comprising measuring cylinder 1 and being installed on measuring cylinder 1 The necking mechanism used to reduce the inner diameter of the screw-in cylinder; the inner wall of the measuring cylinder 1 is provided with a plurality of bar-shaped grooves 2 distributed along the circumferential direction for installing the necking mechanism along the axial direction, and the necking mechanism includes multiple A necking assembly with the same structure and a plurality of necking assemblies distributed along the circumference and installed in the corresponding strip groove 2, each set of necking assemblies includes a first hinged rod 3, the front end is hinged to the rear end of the first hinged rod 3 The second articulated rod 4 and the drive rod 5 hinged with the rear end of the second articulated rod 4 at the front end, the front end of the first articulated rod 3 is hinged with the sidewall of the strip groove 2, the second articulated rod 4 and The two ends of the hinge shaft 6 of the drive rod 5 are embedded in the guide groove 7 on the side wall of the bar-shaped groove 2 and are slidably matched with the screw-in cylinder along the axial single degree of freedom; the tail end of the bar-shaped groove 2 is provided with a shaft The strip-shaped radial through-hole 8 distributed in the direction, the rear end of the drive rod 5 is bent radially outward to form a handle 9 that cooperates with the bar-shaped groove 2 with a single degree of freedom, and the handle 9 is provided with a handle for pushing forward The cylindrical spring 12 of the handle 9, the front end of the cylindrical spring 12 is fixed on the handle 9, and the rear end is fixed on the mounting seat 10 provided with the rear end of the measuring cylinder 1. The outer circle of the measuring cylinder 1 rear end is provided with an annular scale line 11, and the cylindrical spring 12 The top is fixedly provided with an indicator 13 that cooperates with the ring scale line 11; the hand-held end of the measuring cylinder 1 is the rear end, and the front end is the end that penetrates into the measured piece; the inner diameter of the measuring cylinder 1 is equal to the outer diameter of the shaft or the large-radius cylindrical end , the end face of the strip groove 2 is rectangular. When in use, the measuring cylinder 1 fits over the end of the shaft or the end of a large-radius cylinder, and moves the measuring cylinder 1 in the axial direction so that the first hinged rod 3 and the second hinged rod The hinge shaft 6 of 4 is axially located at the journal or small-radius cylindrical section and moves and rotates axially. Since the handle 9 is provided with a forward thrust, the vertex after the rotation of the first hinge rod 3 and the second hinge rod 4 is Press against the journal or the outer circle of the small-radius cylindrical section. During the process of rotation and axial movement, observe the relative position of the indicator 13 on the cylindrical spring 12 and the ring scale line 11 in the axial direction to judge whether the cylindrical spring 12 is deformed. , through the deformation of each cylindrical spring 12 to detect the coaxiality accuracy, of course, the physical parameters of each cylindrical spring 12 are consistent, including stiffness coefficient, length, etc. In the case of the inner side of the cylindrical end, the large-diameter cylindrical section can be penetrated into the small-diameter cylindrical section to improve the detection efficiency.

In this embodiment, five necking assemblies are arranged in the circumferential direction; to ensure the accuracy of detection and facilitate observation at the same time.

In this embodiment, the annular scale lines 11 are a plurality of annular scale lines 11 distributed parallel to the axial direction; each annular scale line 11 corresponds to a diameter of a journal or a small-radius cylindrical section, improving the scope of application of the tooling .

In this embodiment, the indicator 13 is a pointer or a marking point; preferably a mechanical pointer, which is convenient for observation and accurate for reading.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements without departing from the spirit and scope of the technical solution of the present invention shall be covered by the claims of the present invention.

Claims (4)

1. A coaxiality detection tool for automobile production, characterized in that: comprising a measuring cylinder and a necking mechanism installed in the measuring cylinder for reducing the inner diameter of the screw-in cylinder; the inner wall of the measuring cylinder is axially provided with a plurality of The bar-shaped grooves distributed along the circumference for installing the necking mechanism, the necking mechanism includes a plurality of necking assemblies with the same structure and the multiple necking assemblies are distributed in the circumferential direction and installed in the corresponding bar-shaped grooves, each The necking assembly of the group includes a first hinged rod, a second hinged rod whose front end is hinged to the rear end of the first hinged rod, and a driving rod whose front end is hinged to the rear end of the second hinged rod, and the front end of the first hinged rod is connected to the bar The side wall of the bar-shaped groove is hinged, and the two ends of the hinge shaft of the second hinge rod and the drive rod are embedded in the guide groove provided on the side wall of the bar-shaped groove and slide with the screw-in cylinder in a single degree of freedom in the axial direction; the bar The tail end of the shaped groove is provided with strip-shaped radial through holes distributed along the axial direction, and the rear end of the drive rod is bent radially outward to form a handle that cooperates with the single degree of freedom of the strip-shaped groove. The cylindrical spring that pushes the handle forward, the front end of the cylindrical spring is fixed on the handle, and the rear end is fixed on the mounting seat at the rear end of the measuring cylinder. The outer circle of the measuring cylinder is provided with a ring scale line, and the cylindrical spring is fixed with a ring Tick mark fits indicator piece. 2. The coaxiality detection tool for automobile production according to claim 1, characterized in that: five necking assemblies are arranged along the circumferential direction. 3. The coaxiality detection tool for automobile production according to claim 2, characterized in that: there are multiple annular scale lines and the multiple annular scale lines are distributed in parallel along the axial direction. 4. The coaxiality detection tool for automobile production according to claim 3, characterized in that: the indicator is a pointer or a marking point.