Rear axle assembly double-reference system testing fixture

Abstract

The utility model relates to the technical field of automobile part detection, and specifically relates to a rear axle assembly double-reference system detection tool. The testing fixture comprises a testing fixture body, the testing fixture body is provided with at least two reference seats, the top of each reference seat is detachably connected with a first reference pin, the testing fixture body is provided with at least two lifting mechanisms, and the top of each lifting mechanism is provided with a second reference pin. When detection is carried out under the ABC reference system, the two second reference pins are matched with the B reference hole and the C reference hole respectively, and positioning under the ABC reference system is completed. When the AMN reference system is switched for detection, the second reference pin is moved downwards to the position below the top face of the corresponding reference base through the lifting mechanism, the rear axle assembly is translated, the M reference hole and the N reference hole are positioned through the two first reference pins respectively, and positioning under the AMN reference system is completed. The detection tool can adapt to positioning of the rear axle assembly with two reference systems, so that the detection efficiency is improved, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts detection, in particular to a double-reference system inspection tool for a rear axle assembly. Background Art

[0002] The CPA rear axle assembly is an important component of the automobile. In order to ensure the accurate installation between the parts, the parts need to be positioned on the inspection fixture during the production process, and the position and size of the assembly holes on the CPA rear axle assembly need to be inspected to ensure that the inspected items meet the design requirements of the drawings. The CPA rear axle assembly is equipped with B, C, M, and N reference holes. In the process of detecting the size of the rear axle assembly, the ABC reference system and the AMN reference system, two different reference systems, are needed. The ABC reference system locates the position of the CPA rear axle assembly in the Z-axis direction through the A reference plane, and locates the position of the CPA rear axle assembly in the X and Y-axis directions through the B and C references. The AMN reference system locates the position of the parts in the Z-axis direction through the A reference plane, and locates the position of the CPA rear axle assembly in the X and Y-axis directions through the M and N references.

[0003] Conventional inspection fixtures only have one reference system. A set of conventional inspection fixtures cannot detect the position of assembly holes of parts under two reference systems, unless more than two sets of inspection fixtures are made. This is a waste of cost and cannot achieve rapid detection. Utility Model Content

[0004] The utility model provides a dual-reference system inspection tool for a rear axle assembly, aiming to solve the problem that the existing inspection tool cannot adapt to position detection of the rear axle assembly under the dual-reference system.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] A rear axle assembly double reference system gauge includes a gauge body, at least two reference seats are provided on the gauge body, the top of the reference seat is detachably connected with a first reference pin, at least two lifting mechanisms are provided on the gauge body, and a second reference pin is provided on the top of the lifting mechanism.

[0007] By adopting the above scheme, when the rear axle assembly needs to be inspected under the ABC reference system, the rear axle assembly is positioned in the Z-axis direction by two reference seats, the B reference hole of the rear axle assembly is positioned by a second reference pin, and the C reference hole of the rear axle assembly is positioned by another second reference pin, thereby positioning the rear axle assembly in the X and Y axis directions. When it is necessary to switch to the AMN reference system to inspect the rear axle assembly, the second reference pin is moved downward to the bottom of the plane where the top surface of the reference seat is located by the lifting mechanism, thereby releasing the positioning effect of the second reference pin on the rear axle assembly. The rear axle assembly is translated, and the reference seat still positions the rear axle assembly in the Z-axis direction. The first first reference pin is inserted into the M reference hole and the corresponding first positioning hole, and then the second first reference pin is inserted into the N reference hole on the rear axle assembly and the corresponding first positioning hole, thereby positioning the rear axle assembly in the X and Y axis directions. A set of inspection fixtures can adapt to the positioning with two sets of reference systems, thereby improving inspection efficiency and reducing costs.

[0008] The utility model is further configured such that the lifting mechanism comprises a fixed seat, a slide rail and a slider, the slide rail is fixedly connected to the side of the fixed seat, the slider is slidably connected to the slide rail, and the second reference pin is fixedly connected to the corresponding slider. The vertical height of the second reference pin can be adjusted by the cooperation between the slider and the slide rail, so as to facilitate the lifting of the second reference pin and make the lifting process of the second reference pin stable.

[0009] The utility model is further configured that the sliding block is fixedly connected with a connecting arm, and the second reference pin is fixedly connected to the corresponding free end of the connecting arm.

[0010] The utility model is further configured such that a first mounting hole is provided on the connecting arm, a first latch is inserted into the first mounting hole, and a first slot for inserting the first latch is provided on the side of the fixing seat. The second reference pin can be fixed at a preset height by inserting the first latch into the first slot, thereby preventing the second reference pin from moving upward or downward.

[0011] The utility model is further configured such that any one of the reference seats is slidably mounted on the gauge body along the horizontal direction. Since the spacing between the M and N reference holes varies in different rear axle assemblies when the rear axle is positioned using the M and N references, when designing the gauge, one of the reference seats is slidably mounted on the gauge body so that one of the reference seats can be translated along the Y direction of the gauge to solve the problem of being unable to position due to the different spacing between the M and N reference holes.

[0012] The utility model is further configured such that a positioning block is fixedly connected to the side of the reference seat slidably mounted on the gauge body, a second mounting hole is provided on the positioning block, a second latch is inserted into the second mounting hole, and a second slot for the second latch to be inserted is provided on the gauge body. By inserting the second latch into the second slot, the sliding of the movable reference seat on the gauge body is restricted, thereby preventing the reference seat from sliding when it is not needed.

[0013] The utility model is further configured that the gauge body is provided with positioning units, the number of the positioning units corresponds to the reference seat, the positioning units correspond to the reference seat one by one, and the positioning units are used to press down the workpiece to be measured. Pressing down the workpiece to be measured by the positioning unit is equivalent to the positioning unit and the reference seat working together to clamp the workpiece to be measured from the upper and lower sides, thereby fixing the workpiece to be measured and preventing the workpiece to be measured from shifting during detection.

[0014] The utility model is further configured that the inspection tool body is provided with a first inspection unit and a second inspection unit, the first inspection unit is used to inspect a first portion of holes to be inspected on the workpiece to be inspected, and the second inspection unit is used to inspect a second portion of holes to be inspected on the workpiece to be inspected. The first inspection unit and the second inspection unit facilitate the position detection of the assembly holes of the parts to be inspected.

[0015] The utility model is further configured such that a positioning seat is provided on the inspection tool body, and a second positioning hole is provided on the positioning seat for the first reference pin to be embedded. Since the first reference pin is not needed in the rear axle assembly under the ABC reference system, the first reference pin needs to be pulled out from the corresponding first positioning hole. The first reference pin can be placed in the second positioning hole when not needed, so as to facilitate the storage of the first reference pin.

[0016] The utility model is further configured that the bottom of the inspection tool body is provided with universal wheels, through which the inspection tool can be conveniently moved to a suitable position for easy movement.

[0017] In summary, the dual-reference system inspection fixture for the rear axle assembly provided by the utility model has at least the following features:

[0018] Beneficial effects:

[0019] 1. One set of inspection fixtures can be used to position the rear axle assembly with two sets of reference systems, thereby improving inspection efficiency and reducing costs.

[0020] 2. Able to adapt to the changes in the relative distances between the M and N reference holes on different rear axle assemblies. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any novel labor.

[0022] Figure 1 is a schematic diagram of the three-dimensional structure of the embodiment at a first viewing angle;

[0023] Figure 2 is a schematic diagram of the three-dimensional structure of the rear axle assembly installed on the embodiment at a second viewing angle (wherein the positioning unit, the first detection unit and the second detection unit are hidden);

[0024] Figure 3 is an assembly schematic diagram of the rear axle assembly installed on the embodiment at a second viewing angle (wherein the positioning unit, the first detection unit and the second detection unit are hidden);

[0025] Figure 4 is a schematic diagram of the three-dimensional structure of the embodiment at a third viewing angle (in which the positioning unit, the first detection unit and the second detection unit are hidden);

[0026] Figure 5 yes Figure 4 Magnified view at A in the middle;

[0027] Figure 6 It is a schematic diagram of the three-dimensional structure of the rear axle assembly in the background technology from a bottom perspective.

[0028] The reference numerals in the figure include: 1, the inspection fixture body, 2, the reference seat, 3, the first positioning hole, 4, the first reference pin, 5, the second reference pin, 6, the lifting mechanism, 601, the fixed seat, 602, the slide rail, 603, the slider, 7, the connecting arm, 8, the first latch, 9, the positioning block, 10, the second latch, 11, the positioning unit, 111, the pressure arm, 112, the handle, 113, the base, 12, the first detection unit, 13, the second detection unit, 14, the positioning seat, 15, the second positioning hole, 16, the universal wheel, 17, the rear axle assembly, 18, the B reference hole, 19, the C reference hole, 20, the M reference hole, 21, the N reference hole, 22, the auxiliary reference hole. DETAILED DESCRIPTION

[0029] In order to make those skilled in the art better understand the technical solution of the utility model, the following Figure 1-6 The utility model is further described in detail with specific implementation methods.

[0030] See also Figure 1-6, the present embodiment provides a dual-reference system gauge for a rear axle assembly, comprising a gauge body 1, on which at least two reference seats 2 are provided. In the present embodiment, four reference seats 2 are preferably provided on the gauge body 1, corresponding to the four corners of the rear axle assembly 17 respectively. Two of the corners of the rear axle assembly 17 have an M reference hole 20 and an N reference hole 21, respectively, and the other two corners have auxiliary reference holes 22. Two of the reference seats 2 correspond one-to-one to the M reference hole 20 and the N reference hole 21 on the rear axle assembly 17, and the other two reference seats 2 correspond one-to-one to the two auxiliary reference holes 22 on the rear axle assembly 17. The top of the reference seat 2 is detachably connected to a first reference pin 4. Specifically, a first positioning hole 3 is provided on the top surface of the reference seat 2, and a first reference pin 4 is inserted into the first positioning hole 3. The diameter of the middle section of the first reference pin 4 is larger than the diameter of the upper section and the lower section of the first reference pin 4, the diameter of the lower section of the first reference pin 4 matches the inner diameter of the first positioning hole 3, and the lower section of the first reference pin 4 is inserted into the first positioning hole 3. After the lower section of the first reference pin 4 is inserted into the first positioning hole 3, due to the larger diameter of the middle section of the first reference pin 4, the middle section of the first reference pin 4 is supported on the corresponding reference seat 2. At least two lifting mechanisms 6 are provided on the gauge body 1, and the top of the lifting mechanism 6 is provided with a second reference pin 5, and the second reference pin 5 as a whole can be moved to the bottom of the plane where the top surface of the reference seat 2 is located. In this embodiment, two lifting mechanisms 6 are preferably provided, and the two second reference pins 5 corresponding to the two lifting mechanisms 6 correspond to the B reference hole 18 and the C reference hole 19 on the rear axle assembly 17. In some embodiments, the lifting mechanism 6 includes a fixed seat 601, a slide rail 602 and a slider 603. The fixed seat 601 is fixedly connected to the inspection fixture body 1, the slide rail 602 is fixedly connected to the side of the fixed seat 601, the slide rail 602 is vertically arranged, and the slider 603 is slidably connected to the slide rail 602. The slider 603 is fixedly connected to the connecting arm 7, and the second reference pin 5 is fixedly connected to the free end of the corresponding connecting arm 7. The connecting arm 7 is provided with a first mounting hole, and the first latch 8 is inserted into the first mounting hole. The side of the fixed seat 601 is provided with a first slot for inserting the first latch 8. The height of the connecting arm 7 in the Z-axis direction can be positioned by inserting the first latch 8 into the first mounting hole and the corresponding first slot, thereby positioning the height of the second reference pin 5 in the Z-axis direction.

[0031] Since the spacing between the M reference hole 20 and the N reference hole 21 varies in different rear axle assemblies 17 when the rear axle is positioned using the AMN reference system, one of the reference seats 2 is slidably mounted on the gauge body 1 when designing the gauge, so that one of the reference seats 2 can be translated along the Y direction of the gauge, which satisfies the problem of being unable to be positioned due to the different spacing between the M reference hole 20 and the N reference hole 21. Furthermore, the reference seat 2 corresponding to the N reference hole 21 is horizontally slidably mounted on the gauge body 1 along the direction corresponding to the Y axis. A positioning block 9 is fixedly connected to the side of the reference seat 2 slidably mounted on the gauge body 1, and a second mounting hole is provided on the positioning block 9, and a second latch 10 is inserted into the second mounting hole, and a second slot for inserting the second latch 10 is provided on the gauge body 1. The second latch 10 is inserted into the second mounting hole and the second slot, thereby locking the reference seat 2 to prevent the reference seat 2 from sliding on the gauge body 1.

[0032] The gauge body 1 is provided with a positioning unit 11, the number of the positioning units 11 corresponds to the reference seat 2, and the positioning units 11 correspond one-to-one with the reference seat 2. The positioning unit 11 is used to press down the workpiece to be measured. The positioning unit 11 is a prior art, and the positioning unit 11 includes a handle 112, a pressure arm 111 and a base 113. The base 113 is fixed on the gauge body 1, and the pressure arm 111 is hinged to the base 113. The pressure arm 111 can be driven by the handle 112 to rotate around the hinge point with the base 113. The pressure arm 111 can be driven by the handle 112 to press down the rear axle assembly 17 to limit the position, and the free end of the pressure arm 111 can be driven by the handle 112 to move upward to release the limiting effect on the rear axle assembly 17.

[0033] Since the rear axle assembly 17 needs to be inspected under the ABC reference system and the AMN reference system, the rear axle assembly 17 has a first part of holes to be inspected under the ABC reference system and a second part of holes to be inspected under the AMN reference system. The gauge body 1 is provided with a first inspection unit 12 and a second inspection unit 13. The first inspection unit 12 is used to inspect the first part of holes to be inspected on the workpiece to be inspected, and the second inspection unit 13 is used to inspect the second part of holes to be inspected on the workpiece to be inspected. The first inspection unit 12 and the second inspection unit 13 are both structures commonly used for hole position detection on existing gauges, and the number and distribution position on the gauge body 1 are set according to the needs of the workpiece to be inspected. The gauge body 1 is provided with a positioning seat 14, and the positioning seat 14 is provided with a second positioning hole 15 for the first reference pin 4 to be embedded. A universal wheel 16 is provided at the bottom of the gauge body 1 to facilitate the movement of the gauge, and the universal wheel 16 is fixedly installed at the bottom of the gauge body 1. The universal wheel 16 can specifically adopt the universal wheel 16 with a locking function in the prior art for easy use.

[0034] Working principle: By adopting the above scheme, in the initial state, the first reference pin 4 in the first positioning hole 3 is pulled out, and the first reference pin 4 is placed in the corresponding second positioning hole 15. When the rear axle assembly 17 needs to be positioned in the ABC reference system, the rear axle assembly 17 is placed on four reference seats 2, and the top surfaces of the four reference seats 2 together constitute the A reference plane, thereby positioning the Z-axis coordinate of the rear axle assembly 17; after the rear axle assembly 17 is initially positioned on the A reference plane, the two second reference pins 5 set on the A reference plane are respectively inserted into the B reference hole 18 and the C reference hole 19 for plane positioning, thereby positioning the position of the rear axle assembly 17 in the X-axis and Y-axis directions. The four pressure arms 111 cooperate with the four reference seats 2 to clamp the rear axle assembly 17 together, thereby fixing the rear axle assembly 17 on the ABC reference system. The first detection unit 12 can detect the position of the first part of the hole to be measured on the rear axle assembly 17 under the ABC reference system.

[0035] When it is necessary to switch to the second reference system, release the pressure arm 111 and loosen the rear axle assembly 17. Lower the two second reference pins 5 to disengage from the corresponding B reference hole 18 and C reference hole 19, thereby releasing the limit of the rear axle assembly 17 in the X-axis and Y-axis directions. Translate the rear axle assembly 17 on the A reference plane, insert a first reference pin 4 into the M reference hole 20, and insert it into the first positioning hole 3 corresponding to the M reference hole 20; insert another first reference pin 4 into the N reference hole 21, and insert it into the corresponding first positioning hole 3; insert the other two first reference pins 4 into the corresponding auxiliary reference holes 22 and the first positioning hole 3 respectively, so as to locate the position of the rear axle assembly 17 in the X-axis and Y-axis directions, thereby switching the rear axle assembly 17 to the AMN reference system. Clamp the rear axle assembly 17 through the pressure arm 111 and the four supporting surfaces, so as to switch the rear axle assembly 17 to the AMN reference system. After switching to the AMN reference system, check the position of the second part of the holes to be measured. The second detection unit 13 can detect the position of the hole to be measured in the second part of the rear axle assembly 17 under the AMN reference system.

[0036] It should be noted that the words indicating direction in this article, such as up and down, are all based on Figure 1 The setting of the direction is only for the convenience of description and has no other specific meaning.

[0037] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or device. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the article or device including the above elements.

[0038] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A rear axle assembly dual reference system inspection fixture, comprising an inspection fixture body (1), characterized in that: The gauge body (1) is provided with at least two reference seats (2), the top of each reference seat (2) is detachably connected to a first reference pin (4), and the gauge body (1) is provided with at least two lifting mechanisms (6), the top of each lifting mechanism (6) is provided with a second reference pin (5).

2. A dual reference system inspection fixture for a rear axle assembly as claimed in claim 1, characterized in that: The lifting mechanism (6) comprises a fixed seat (601), a slide rail (602) and a slider (603); the slide rail (602) is fixedly connected to the side of the fixed seat (601); the slider (603) is slidably connected to the slide rail (602); and the second reference pin (5) is fixedly connected to the corresponding slider (603).

3. A rear axle assembly dual reference system inspection fixture as claimed in claim 2, characterized in that: The sliding block (603) is fixedly connected to a connecting arm (7), and the second reference pin (5) is fixedly connected to the corresponding free end of the connecting arm (7).

4. A rear axle assembly dual reference system inspection fixture as claimed in claim 3, characterized in that: The connecting arm (7) is provided with a first mounting hole, a first latch (8) is inserted into the first mounting hole, and a first slot for inserting the first latch (8) is provided on a side surface of the fixing seat (601).

5. A rear axle assembly dual reference system inspection fixture as claimed in claim 1, characterized in that: Any one of the reference seats (2) is slidably mounted on the gauge body (1) along a horizontal direction.

6. A rear axle assembly dual reference system inspection fixture as claimed in claim 5, characterized in that: A positioning block (9) is fixedly connected to the side of the reference seat (2) slidably mounted on the gauge body (1); a second mounting hole is provided on the positioning block (9); a second latch (10) is inserted into the second mounting hole; and a second slot for inserting the second latch (10) is provided on the gauge body (1).

7. A dual-reference system inspection fixture for a rear axle assembly as claimed in any one of claims 1 to 6, characterized in that: The gauge body (1) is provided with positioning units (11), the number of the positioning units (11) corresponds to the reference seat (2), the positioning units (11) correspond one-to-one with the reference seat (2), and the positioning units (11) are used to press down the workpiece to be measured.

8. A rear axle assembly dual reference system inspection fixture as claimed in claim 1, characterized in that: The gauge body (1) is provided with a first detection unit (12) and a second detection unit (13); the first detection unit (12) is used to detect a first portion of holes to be measured on a workpiece to be measured, and the second detection unit (13) is used to detect a second portion of holes to be measured on the workpiece to be measured.

9. A rear axle assembly dual reference system inspection fixture as claimed in claim 1, characterized in that: The gauge body (1) is provided with a positioning seat (14), and the positioning seat (14) is provided with a second positioning hole (15) for the first reference pin (4) to be embedded.

10. A dual reference system inspection fixture for a rear axle assembly as claimed in claim 1, characterized in that: The bottom of the inspection tool body (1) is provided with a universal wheel (16).

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