Alignment measuring device suitable for axle hole of differential shell

Abstract

The invention relates to the technical field of laser measurement, and discloses a differential shell shaft hole alignment measurement device, which comprises a detection table and an adjusting arm movably arranged on the detection table, and a laser detection head is arranged at the end part of the adjusting arm; the workpiece positioner is arranged on the table top of the detection table, an installation arm is rotationally arranged on the workpiece positioner, a limiting piece and a bearing round rod are installed on the middle section and the end of the installation arm respectively, and the limiting piece is used for wrapping type limiting of the tail of a differential shell workpiece; and the rotating wheel is rotationally mounted at the end of the mounting arm, an elastic adhesion piece is arranged on the outer side of a middle shaft in the middle of the rotating wheel, and the rotating wheel and the elastic adhesion piece achieve rotation regulation and control of the differential mechanism shell around the central axis of the differential mechanism shell. According to the shaft hole alignment measuring device suitable for the differential shell, adjustment and control of assembly of the differential shell are facilitated, subsequent laser measurement of shaft hole alignment is facilitated, and the measurement efficiency and accuracy are improved during laser measurement of shaft hole alignment.

Description

Technical Field

[0001] The present invention relates to the technical field of laser measurement of differential cases, in particular to a device suitable for measuring the alignment of shaft holes of differential cases. Background Art

[0002] After the differential housing is cast and milled to remove burrs and other impurities or by-products on the workpiece, drilling and milling are required on the differential housing workpiece to provide a positioning position for the assembly of the differential drive shaft. During the drilling process of the differential housing, due to the influence of external environmental factors such as the operating process, there will be differences in the alignment of the shaft holes of the differential housing, so that the two shaft holes cannot be kept on the same axis, affecting the subsequent installation and use of differential accessories. Therefore, after the differential housing is processed and formed, it is necessary to conduct batch laser measurement and random inspection of the shaft hole alignment to reduce the shaft hole alignment errors of the single-batch mechanically formed differential housing.

[0003] In the existing differential housing, when realizing the alignment measurement of the shaft hole, the differential housing needs to be clamped and positioned before measurement. However, during the clamping and positioning process, it is easy to be affected by waste chips at the measurement position and the uneven surface of the differential housing itself, making it impossible for the differential housing to be quickly and effectively maintained in a good horizontal positioning state. After positioning, there is a high probability of an alignment angle difference between the differential housing and the laser measuring instrument used for measurement, affecting the accuracy of the laser alignment measurement. At the same time, after the differential housing is positioned, the shaft hole alignment measurement is only performed by moving the laser measuring instrument, which has many measurement points and low measurement efficiency.

[0004] In view of the above problems, it is urgent to carry out innovative design based on the original differential case shaft hole alignment measurement device. Summary of the Invention

[0005] The purpose of the present invention is to provide a device for measuring the alignment of axle holes in a differential case, so as to solve the problem that the existing device for measuring the alignment of axle holes in a differential case proposed in the above background technology uses a laser measuring instrument to measure the alignment of axle holes, has low operating efficiency, and is easily affected by the positioning of the differential case and its measurement accuracy.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a device for measuring the alignment of a differential case shaft hole, comprising a detection platform and an adjustment arm movably arranged thereon, wherein a laser detection head is provided at the end of the adjustment arm; The apparatus further comprises: a workpiece locator, which is arranged on the table of the inspection table, and a mounting arm is rotatably provided on the workpiece locator, and a limit member and a bearing round rod are respectively installed on the middle section and the end of the mounting arm. The limit member is used for wrapping the tail of the differential housing workpiece. The limit member and the bearing round rod jointly realize the lever-type positioning and horizontal control of the differential housing workpiece; The rotating wheel is rotatably mounted at the end of the mounting arm. An elastic adhesive part is provided on the outer side of the central axis of the rotating wheel. The rotating wheel and the elastic adhesive part realize the rotation control of the differential housing around its own central axis.

[0007] Preferably, the smooth outer wall of the bearing round rod is arranged tangent to the bottom of the outer wall of the differential housing workpiece; and the limit member is used to wrap and clamp the tail of the differential housing workpiece, as well as to control the upward and downward push of the tail of the differential housing workpiece, so that the differential housing workpiece uses the position of the bearing round rod as the rotation node to achieve lever-type cantilever positioning control.

[0008] Preferably, the limiter is composed of a telescopic rod, a receiving plate and a tension belt, wherein elastic members are provided at the connection points between the telescopic rod and the mounting arm and the receiving plate, and tension belts are fixed between adjacent receiving plates; The tension belt and the receiving plate are both embedded with movable parts, and the movable parts are rollingly connected to the outer wall of the differential housing workpiece.

[0009] Preferably, the elastic member is used for fixed connection between the telescopic rod and the mounting arm and the receiving plate, and for realizing rotation control of the connection between the end of the telescopic rod and the mounting arm and the receiving plate.

[0010] Preferably, the rotating wheel corresponds to the mounting arm one-to-one, and both are symmetrically arranged on the workpiece locator, wherein a gap is reserved between the outer wall of the rotating wheel and the differential housing workpiece.

[0011] Preferably, the elastic adhesive member is provided in a cylindrical structure, wherein the inner wall thereof is fixed to the outer wall of the middle shaft of the rotating wheel, and the elastic adhesive member is adhesively provided to the differential housing workpiece.

[0012] Preferably, a movable plate is fixed to the end of the elastic adhesive member, and the movable plate is slidably connected to the outer wall of the central axis of the rotating wheel, and the connection end of the elastic adhesive member and the movable plate is convex; At the same time, an electromagnetic component is embedded on the outer wall of the rotating wheel, and the electromagnetic component and the permanent magnet embedded on the back of the movable plate magnetically repel each other.

[0013] Preferably, an adhesive channel is reserved on the outer wall of the elastic adhesive member, wherein the adhesive channel improves the elasticity of the elastic adhesive member and improves the adhesive properties between the elastic adhesive member and the differential housing workpiece.

[0014] Preferably, a space is reserved between the electromagnetic component and the differential housing workpiece, and the electromagnetic components on the left and right sides of the rotating wheel are coaxially arranged, and their coaxial axes are perpendicular to the differential housing workpiece. The electromagnetic component utilizes the Ampere force of electromagnetic drive to assist the rotation of the differential housing workpiece.

[0015] Preferably, the laser detection head is horizontally moved and the rotation angle is controlled on the adjustment arm by electromagnetic action, wherein a calibration piece is coaxially fixed on the back of the laser detection head; At the same time, a support is fixed to the lower end of the adjustment arm on the side of the laser detection head. The support is used to support the front end of the differential housing workpiece. At the same time, a detection part is fixed on the workpiece locator outside the shaft hole on the back of the differential housing workpiece. The detection part and the laser detection head are used for shaft hole alignment measurement of the differential housing workpiece.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the device for measuring the alignment of the shaft hole of the differential case facilitates the adjustment and control of the differential case assembly and the subsequent laser measurement of the shaft hole alignment. It can also assist the rotation of the differential case and improve the measurement efficiency and accuracy during the laser measurement of the shaft hole alignment. The specific contents are as follows: By simply pushing up and pulling down the limiter on the mounting arm and slidingly supporting the differential housing workpiece with the bearing rod, the differential housing workpiece can be positioned on the workpiece locator in a lever-like cantilevered manner, making it easy to adjust the orientation angle of the differential housing and calibrate the coaxial position with the laser detection head, thereby facilitating the alignment measurement of the differential housing shaft hole. Furthermore, a rotating wheel and an elastic adhesive member thereon are provided on the mounting arm, which can provide a preliminary limit for the cantilevered positioning of the differential case workpiece, preventing it from falling. At the same time, the elastic adhesive member is provided to elastically support the differential case workpiece. The elastic adhesive member can also utilize the repeated action of adhesive adhesion during rotation to realize the rotation of the differential case workpiece, complete the alignment measurement control of the differential case shaft hole, and improve the comprehensiveness and accuracy of the measurement. Furthermore, an electromagnetic component and a rotating wheel are provided. Under the action of electromagnetic repulsion, the elastic adhesive member deforms and fits the differential housing, driving it to rotate more stably. Electromagnetic drive can also be used to assist in the smoothness of its rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the front structure of the present invention; Figure 2 This is a schematic diagram of the back structure of the present invention; Figure 3 This is a schematic diagram of the front structure of the laser detection head, calibration component and support component installation distribution of the present invention; Figure 4 This is a schematic diagram of the side structure of the installation distribution of the laser detection head, calibration component and support component of the present invention; Figure 5 This is a schematic diagram of the use of the mounting arm of the present invention; Figure 6 This is a schematic diagram of the installation of the limiting member of the present invention; Figure 7Schematic diagram of the structure of the limiting member of the present invention; Figure 8 This is a schematic diagram of the distribution of the rotating wheel and the electromagnetic component of the present invention; Figure 9 Schematic diagram of the structure of the elastic adhesive member of the present invention.

[0018] In the figure: 1. Testing platform; 2. Adjusting arm; 3. Laser detection head; 301. Calibration part; 302. Support part; 303. Detection part; 4. Workpiece locator; 5. Mounting arm; 6. Limiting part; 601. Telescopic rod; 602. Receiving plate; 603. Tension belt; 604. Movable part; 7. Load-bearing round rod; 8. Rotating wheel; 9. Elastic adhesive part; 901. Movable plate; 902. Adhesive channel; 10. Electromagnetic component. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Example 1: Please refer to Figures 1-9 The present invention provides a technical solution: a device suitable for measuring the alignment of the shaft hole of a differential case, comprising a detection platform 1 and an adjustment arm 2 movably arranged thereon, with a laser detection head 3 provided at the end of the adjustment arm 2; in this technical solution, the adjustment arm 2 is hydraulically controlled, and the adjustment arm 2 can be vertically extended and moved horizontally, so that the laser detection head 3 can be moved on the X-axis and the Z-axis, wherein the movement of the Y-axis is realized by the workpiece locator 4, and the differential case workpiece mounted thereon is driven to move by the workpiece locator 4 to perform laser measurement of the alignment of the shaft hole of the differential case workpiece.

[0021] Use Figure 5-Figure 7The technical solution shown is as follows: a workpiece locator 4 is arranged on the table top of the inspection table 1, and a mounting arm 5 is rotatably provided on the workpiece locator 4, and a limiter 6 and a bearing round rod 7 are respectively installed in the middle section and the end of the mounting arm 5. The limiter 6 is used for the wrapped limiting of the tail of the differential housing workpiece, and the limiter 6 and the bearing round rod 7 jointly realize the lever-type positioning and horizontal control of the differential housing workpiece; the smooth outer wall of the bearing round rod 7 is tangent to the bottom of the outer wall of the differential housing workpiece; and the limiter 6 is used for the wrapped clamping of the tail of the differential housing workpiece, as well as the push-up and pull-down control of the tail of the differential housing workpiece, so that the differential housing workpiece uses the position of the bearing round rod 7 as the rotation node to achieve lever-type cantilever positioning control; when the differential housing workpiece is in During assembly on the workpiece locator 4, the bottom of the differential housing workpiece is placed tangentially on the supporting rod 7, and the differential housing workpiece is supported by the supporting rod 7. At the same time, the limiter 6 is used to clamp and wrap the tail of the differential housing workpiece. At the same time, the limiter 6 acts to push up or pull down the tail of the differential housing workpiece, so that the differential housing workpiece rotates cantilevered with the contact point with the supporting rod 7 as the axis of rotation, thereby controlling the orientation of the differential housing workpiece so that it can remain coaxial with the laser detection head 3 for subsequent laser measurement. When adjusting the orientation of the differential housing workpiece, the motor can also be used to drive the mounting arm to rotate, so that the mounting arm and the entire differential housing workpiece on it can be adjusted in angle.

[0022] In the above technical solution, the limiting member 6 is composed of a telescopic rod 601, a receiving plate 602 and a tension band 603. Elastic members are provided at the connection between the telescopic rod 601 and the mounting arm 5 and the receiving plate 602 at both ends. At the same time, a tension band 603 is fixed between adjacent receiving plates 602. A movable member 604 is embedded and movably installed on the tension band 603 and the receiving plate 602. The movable member 604 is in rolling connection with the outer wall of the differential housing workpiece. The elastic member is used for the fixed connection between the telescopic rod 601 and the mounting arm 5 and the receiving plate 602, and for realizing the telescopic rod 601. The rotation control of the connection between the end and the mounting arm 5 and the receiving plate 602; the telescopic rod 601 is electromagnetically controlled and can accurately control the extension and retraction, and the receiving plate 602 and the tension belt 603 are used to control the push-up or pull-down of the tail of the differential case workpiece, wherein the receiving plate 602 gives the tail of the differential case workpiece an external force to push up, and the tension belt 603 is arranged on the upper side of the tail of the differential case workpiece, as well as its external force to pull down. At the same time, the rolling installation arrangement of the movable part 604 enables the differential case workpiece to reduce the contact friction with the limit part 6 after positioning, so as to facilitate the subsequent use of the rotation around its central axis.

[0023] In this technical solution, the rotating wheel 8 is rotatably mounted at the end position of the mounting arm 5, and an elastic adhesive part 9 is provided on the outer side of the central axis of the rotating wheel 8. The rotating wheel 8 and the elastic adhesive part 9 realize the rotation control of the differential housing around its own central axis; the laser detection head 3 performs horizontal movement and rotation angle control on the adjustment arm 2 through electromagnetic action, wherein a calibration part 301 is coaxially fixed on the back of the laser detection head 3; at the same time, a support part 302 is also fixed at the lower end of the adjustment arm 2 on the side of the laser detection head 3, and the support part 302 is used to support the front end of the differential housing workpiece. At the same time, a detection part 303 is also fixed on the workpiece locator 4 on the outer side of the shaft hole on the back of the differential housing workpiece, and the detection part 303 and the laser detection head 3 are used for the shaft hole alignment measurement of the differential housing workpiece; In the above scheme, the support member 302 supports the bottom of the front end of the differential housing workpiece to prevent it from falling off during detection. At the same time, the support member 302 is provided with an electric telescopic device and a ball structure at the end of the device to improve the load stability of the end of the differential housing workpiece and reduce the damping effect of friction on it; the use of the laser detection head 3 and the calibration member 301 can realize the detection of the laser detection head 3 before the shaft hole is aligned. When it is used, the laser detection head 3 and the detection member 303 are first aligned for detection. Through laser detection, it is determined whether the detection member 303 at this time maintains a vertical alignment state with the laser detection head 3. After vertical alignment, through the use of the calibration member 301, the calibration member 301 adopts a contact rod and a ruby at the end. Under the control of the CNC integrated circuit, the calibration member 301 is in circular contact with the inner wall of the shaft hole at the front end of the differential housing workpiece on the mounting arm 5, thereby obtaining a differential housing. The center node of the axial hole at the front end of the workpiece is obtained by adjusting the position of the calibration piece 301 and the laser detection head 3, so that the laser detection head 3 and the differential housing workpiece that have been preliminarily aligned are coaxially aligned. After the preliminarily coaxial alignment, the laser detection head 3 is moved horizontally relative to the adjustment arm 2 by electromagnetic control. The horizontal movement trajectory of the laser detection head 3 is the diameter of the axial hole at the front end of the differential housing workpiece, so that the laser detection head 3 passes through the axial hole at the front end of the differential housing workpiece and passes through the axial hole at the rear end of the differential housing workpiece, and interacts with the detection piece 303 on the workpiece locator 4 to determine whether the axial hole at the front end and the axial hole at the rear end of the differential housing workpiece on this motion trajectory are aligned. In order to improve the axial hole measurement effect of its laser alignment, by rotating the differential housing workpiece on the workpiece locator 4, the laser detection head 3 can be fully and efficiently measured during horizontal movement to determine whether the axial hole at the front end and the axial hole at the rear end of the differential housing workpiece in the entire range are aligned.

[0024] In this technical solution, the rotating wheel 8 is rotatably installed at the end position of the mounting arm 5, and an elastic adhesive part 9 is provided on the outer side of the central axis of the rotating wheel 8. The rotating wheel 8 and the elastic adhesive part 9 realize the rotation control of the differential housing around its own central axis; the rotating wheel 8 corresponds to the mounting arm 5 one by one, and both are symmetrically arranged on the workpiece locator 4, wherein a gap is reserved between the outer wall of the rotating wheel 8 and the differential housing workpiece; in this technical solution, the function of the rotating wheel 8 is to temporarily limit the differential housing when the differential housing is installed on the workpiece locator 4, and due to the reserved gap setting, the angle orientation adjustment control of the differential housing will not be affected.

[0025] At the same time, in the present technical solution, the elastic adhesive part 9 is arranged in a cylindrical structure, the inner wall of which is fixed on the outer wall of the middle shaft of the rotating wheel 8, and the elastic adhesive part 9 is adhesively arranged with the differential housing workpiece; the elastic adhesive part 9 can be made of an elastic polyurethane glue stick, etc., which provides elastic bearing at the placement when the differential housing workpiece is placed and the angle is adjusted. At the same time, when the elastic adhesive part 9 is driven to rotate by the motor assembly, the contact adhesion of the elastic adhesive part 9 to the differential housing can be utilized. During the continuous rotation process, the adhesive action pulls the aluminum alloy differential housing, giving pulling force and separating the adhesiveness. The repeated action drives the differential housing to rotate around its own central axis to detect the shaft hole alignment.

[0026] Furthermore, a movable plate 901 is fixed to the end of the elastic adhesive part 9, and the movable plate 901 is slidably connected to the outer wall of the middle axis of the rotating wheel 8, and the connection end of the elastic adhesive part 9 and the movable plate 901 is convex; at the same time, an electromagnetic component 10 is embedded on the outer wall of the rotating wheel 8, and the electromagnetic component 10 and the permanent magnet embedded on the back of the movable plate 901 repel each other magnetically; an adhesive channel 902 is also reserved on the outer wall of the elastic adhesive part 9, wherein the adhesive channel 902 improves the elasticity of the elastic adhesive part 9 and improves the adhesive properties between the elastic adhesive part 9 and the differential case workpiece; a spacing is reserved between the electromagnetic component 10 and the differential case workpiece, and the electromagnetic components 10 on the left and right sides of the rotating wheel 8 are coaxially arranged, and their coaxial axes are aligned with the differential case. The electromagnetic component 10 is vertically arranged between the differential case workpieces, and the electromagnetic component 10 uses the Ampere force driven by electromagnetic driving to assist the rotation of the differential case workpiece; under the combined action of the electromagnetic component 10 and the rotating wheel 8, when the electromagnetic component 10 is started, the electromagnetic component 10 gives a thrust to the movable plate 901 at the end of the elastic adhesive component 9 through magnetic repulsion, so that the end of the elastic adhesive component 9 is deformed to increase the contact surface and viscosity with the differential case workpiece, so that it can drive the differential case workpiece to rotate well when the rotating wheel 8 rotates, and realize the shaft hole alignment measurement. At the same time, the use of the electromagnetic component 10 and the rotating wheel 8 can also be driven by the electromagnetic effect during rotation, so that the differential case workpiece rotating around its own central axis moves more smoothly, which plays an auxiliary role in promoting rotation.

[0027] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for measuring the alignment of a differential housing shaft hole, comprising a detection platform (1) and an adjustment arm (2) movably arranged thereon, wherein a laser detection head (3) is provided at the end of the adjustment arm (2); It is characterized in that Also includes: A workpiece locator (4) is arranged on the table of the detection table (1), and a mounting arm (5) is rotatably provided on the workpiece locator (4), and a limiting member (6) and a bearing rod (7) are respectively installed on the middle section and the end of the mounting arm (5), and the limiting member (6) is used for wrapping the tail of the differential housing workpiece. The limiting member (6) and the bearing rod (7) jointly realize the lever-type positioning and horizontal control of the differential housing workpiece; A rotating wheel (8) is rotatably mounted at the end of the mounting arm (5); an elastic adhesive member (9) is provided on the outer side of the central axis of the rotating wheel (8); the rotating wheel (8) and the elastic adhesive member (9) realize the rotation control of the differential housing around its own central axis.

2. The differential case shaft hole alignment measurement device according to claim 1, characterized in that: The smooth outer wall of the bearing round rod (7) is arranged tangentially to the bottom of the outer wall of the differential housing workpiece; The limiting member (6) is used for wrapping and clamping the tail of the differential housing workpiece, and for controlling the upward push and downward pull of the tail of the differential housing workpiece, so that the differential housing workpiece uses the position of the bearing rod (7) as a rotation node, thereby achieving lever-type cantilever positioning control.

3. The differential case shaft hole alignment measurement device according to claim 2, characterized in that: The limiting member (6) is composed of a telescopic rod (601), a receiving plate (602) and a tension band (603), wherein elastic members are provided at the connection points between the telescopic rod (601) and the mounting arm (5) and the receiving plate (602), and tension bands (603) are fixed between adjacent receiving plates (602); A movable part (604) is embedded and movably mounted on both the tension belt (603) and the receiving plate (602), and the movable part (604) is rollingly connected to the outer wall of the differential housing workpiece.

4. The differential case shaft hole alignment measurement device according to claim 3, characterized in that: The elastic member is used for fixed connection between the telescopic rod (601) and the mounting arm (5) and the receiving plate (602), and for realizing rotation control of the connection between the end of the telescopic rod (601) and the mounting arm (5) and the receiving plate (602).

5. The differential case shaft hole alignment measurement device according to claim 1, characterized in that: The rotating wheel (8) corresponds to the mounting arm (5) one by one, and both are symmetrically arranged on the workpiece locator (4), wherein a spacing is reserved between the outer wall of the rotating wheel (8) and the differential housing workpiece.

6. The device for measuring the alignment of a differential case shaft hole according to claim 5, characterized in that: The elastic adhesive member (9) is provided in a cylindrical structure, wherein the inner wall thereof is fixed to the outer wall of the middle shaft of the rotating wheel (8), and the elastic adhesive member (9) is adhesively provided to the differential housing workpiece.

7. The differential case shaft hole alignment measurement device according to claim 6, characterized in that: A movable plate (901) is fixed to the end of the elastic adhesive member (9), and the movable plate (901) is slidably connected to the outer wall of the central axis of the rotating wheel (8), and the connection end between the elastic adhesive member (9) and the movable plate (901) is convex; At the same time, an electromagnetic component (10) is embedded on the outer wall of the rotating wheel (8), and the electromagnetic component (10) and the permanent magnet embedded on the back of the movable plate (901) are magnetically repelled from each other.

8. A differential case shaft hole alignment measurement device according to any one of claims 1 or 5-7, characterized in that: An adhesive channel (902) is also reserved on the outer wall of the elastic adhesive part (9), wherein the adhesive channel (902) improves the elasticity of the elastic adhesive part (9) and improves the adhesive properties between the elastic adhesive part (9) and the differential housing workpiece.

9. The differential case shaft hole alignment measurement device according to claim 8, characterized in that: A spacing is reserved between the electromagnetic component (10) and the differential housing workpiece, and the electromagnetic components (10) on the left and right sides of the rotating wheel (8) are coaxially arranged, and their coaxial axes are perpendicularly arranged to the differential housing workpiece. The electromagnetic component (10) utilizes the Ampere force of electromagnetic drive to assist the rotation of the differential housing workpiece.

10. The device for measuring the alignment of a differential case shaft hole according to claim 1, characterized in that: The laser detection head (3) performs horizontal movement and rotation angle control on the adjustment arm (2) through electromagnetic action, wherein a calibration piece (301) is coaxially fixed on the back of the laser detection head (3); At the same time, a support member (302) is fixed to the lower end of the adjustment arm (2) on the side of the laser detection head (3), and the support member (302) is used to support the front end of the differential housing workpiece. At the same time, a detection member (303) is fixed to the workpiece locator (4) on the outside of the shaft hole on the back side of the differential housing workpiece, and the detection member (303) and the laser detection head (3) are used for the shaft hole alignment measurement of the differential housing workpiece.

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