Balancing shaft support testing fixture and testing method

Abstract

The application provides a balanced shaft support testing tool and a testing method. The balanced shaft support testing tool comprises a first base, a through hole testing assembly, a threaded hole testing assembly and a dial indicator seat. The first base is provided with a first bearing table, a second bearing table and a positioning table. The first bearing table is used for bearing the balanced shaft support. The second bearing table is arranged on one side of the first bearing table. The positioning table is arranged on both sides of the second bearing table. The through hole testing assembly is arranged on one side of the first bearing table on the same side of the second testing hole of the balanced shaft support. The threaded hole testing assembly is arranged on one side of the first bearing table on the same side of the first threaded hole of the balanced shaft support. The threaded hole testing assembly is used for cooperating with the first base to detect the position degree, the symmetry degree and the perpendicularity to the reference hole of the first threaded hole. The balanced shaft support testing tool improves the detection efficiency of the balanced shaft support in batch production and reduces the detection cost.

Description

Technical Field

[0001] This invention relates to the field of comprehensive inspection fixtures for suspension components, specifically to a balance shaft bracket inspection fixture and inspection method. Background Technology

[0002] The balance shaft bracket is a key component of the balance suspension system in commercial vehicle chassis. This balance shaft bracket is for export, and its requirements are stringent, with high dimensional accuracy and a quality target of 30ppm and a defect rate of "zero". The user only conducts random inspections of the parts. If any defect is found, the entire batch of parts is returned, and a 100% inventory check is required to eliminate the defect. If such a situation occurs, the impact on the company's image and economic benefits will be enormous.

[0003] The inspection of balance shaft brackets mainly includes requirements for position, perpendicularity, and symmetry. Common methods for inspecting position, perpendicularity, and symmetry include coordinate measuring machine (CMM), universal inspection, and integrated inspection fixtures. However, CMM and universal inspection are inefficient and costly, suitable for sample debugging and spot checks, but not for the overall inspection of mass-produced parts.

[0004] Therefore, in order to solve the technical problem that it is difficult to perform overall inspection of balance shaft brackets produced in batches, this invention provides a new comprehensive inspection tool and corresponding inspection method for balance shaft brackets. Summary of the Invention

[0005] Based on the above description, the present invention provides a balance shaft bracket inspection fixture and inspection method to solve the problems of low inspection efficiency and high inspection cost for mass-produced balance shaft brackets.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0007] In a first aspect, a balance shaft bracket inspection fixture includes: a first base, a through-hole inspection assembly, a threaded hole inspection assembly, and a dial indicator base;

[0008] The first base is provided with a first support platform, a second support platform, and a positioning platform. The first support platform is used to support the balance shaft bracket. The positioning platform is disposed on both sides of the second support platform. The positioning platform cooperates with the dial indicator base to detect the perpendicularity of the F-plane of the balance shaft bracket to the reference hole.

[0009] The through-hole detection component is arranged on the same side as the second detection hole of the balance shaft bracket on one side of the first support platform. The through-hole detection component is used to cooperate with the first base to detect the position accuracy of the second detection hole.

[0010] The threaded hole detection component is arranged on one side of the first bearing platform, on the same side as the first threaded hole of the balance shaft bracket. The threaded hole detection component is used to cooperate with the first base to detect the position, symmetry and perpendicularity of the first threaded hole to the reference hole.

[0011] Based on the above technical solution, the present invention can be further improved as follows.

[0012] Furthermore, the first support platform includes: a positioning post and a support base;

[0013] The positioning post is vertically mounted on the bearing seat, and the size of the positioning post is adapted to the size of the reference hole;

[0014] The support seat is disposed on the first support platform, and the upper surface of the support seat is connected to the positioning column. The area of ​​the upper surface is larger than the cross-sectional area of ​​the positioning column, and the upper surface is used to abut against the balance shaft bracket.

[0015] Furthermore, the second support platform includes: a positioning hole and a positioning hole seat;

[0016] The positioning hole is perpendicularly inserted into the second support platform, and the positioning hole seat is provided with a through hole, which corresponds to the positioning hole.

[0017] Furthermore, the positioning stage includes: a first detection pin, a first through hole, and a reference pin;

[0018] The first through hole is vertically disposed on the side of the positioning platform near the first bearing platform, and the first detection pin is used to cooperate with the first through hole to detect the position accuracy of the second threaded hole;

[0019] The reference pin is vertically disposed on the side of the positioning platform near the second bearing platform. The reference pin is used to cooperate with the dial indicator base to detect the perpendicularity of the balance shaft bracket F surface to the reference hole.

[0020] Furthermore, the balance shaft bracket inspection fixture also includes: a sliding measuring base; the sliding measuring base is disposed on the second support platform, and the sliding measuring base is used to cooperate with the first base to position the balance shaft bracket and measure the position of the first detection hole.

[0021] Furthermore, the sliding measurement component includes: a second base, a positioning detection plate, and a slide rail;

[0022] The positioning detection plate is vertically disposed at one end of the second base near the first support platform; the slide rail is fixedly disposed on the second support platform in the direction toward the first support platform, and the second base is connected to the slide rail;

[0023] The positioning detection plate is used to detect the position of the first detection hole.

[0024] Furthermore, the through-hole detection assembly includes: a third base and a third detection pin;

[0025] The third base is provided with side plates and a bottom plate; the two side plates are respectively vertically arranged at both ends of the bottom plate, and the bottom of the balance shaft bracket is located between the two side plates;

[0026] The side plate is provided with a third through hole; the size of the third through hole is adapted to the size of the third detection pin, and the third through hole and the third detection pin are used to detect the position of the second detection hole.

[0027] Furthermore, the threaded hole detection assembly includes: a fourth base, a lever dial indicator, a fourth detection pin, and a symmetry measuring pin;

[0028] The fourth base is vertically disposed on the first base, and the symmetry measuring pin is vertically disposed at the end of the fourth base away from the first base;

[0029] The fourth detection pin can be inserted into the first threaded hole, and the fourth detection pin is used to detect the position of the first threaded hole.

[0030] The lever dial indicator is connected to the symmetry measuring pin. The lever dial indicator is used to cooperate with the symmetry measuring pin and the fourth detection pin to detect the symmetry and perpendicularity of the first threaded hole.

[0031] Furthermore, the dial indicator base includes: a dial indicator, a first indicator rod, a second indicator rod, a base, and an adjusting screw;

[0032] The first gauge rod is vertically disposed on one side of the gauge base, the second gauge rod is vertically disposed on the first gauge rod, the adjusting screw is disposed on the end of the second gauge rod close to the first gauge rod, and the dial indicator is vertically disposed on the end of the second gauge rod away from the first gauge rod.

[0033] Secondly, the present invention also provides a method for inspecting a balance shaft bracket using a balance shaft bracket inspection fixture as described in any one of the first aspects, comprising:

[0034] The balance shaft bracket is placed on the first base, which is in conjunction with the dial indicator base to detect the perpendicularity of the F-plane of the balance shaft bracket to the reference hole.

[0035] The through-hole detection component is fitted with the first base to detect the position accuracy of the second detection hole of the balance shaft bracket;

[0036] The symmetry measuring pin of the threaded hole detection assembly is pushed forward, and the fourth detection pin of the threaded hole detection assembly engages with the symmetry measuring pin. The probe of the lever dial indicator contacts the surface of the fourth detection pin. The symmetry measuring pin is rotated, and the symmetry measuring pin drives the fourth detection pin to rotate, thereby detecting the symmetry and perpendicularity of the first threaded hole relative to the reference hole.

[0037] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0038] This invention provides a balance shaft bracket inspection fixture and testing method. A first base with a first support platform, a second support platform, and a positioning platform is designed to support and inspect the balance shaft bracket. The first support platform primarily supports the balance shaft bracket. The second support platform, located on one side of the first support platform, supports a sliding measuring component. The positioning platforms are located on both sides of the second support platform and can cooperate with a dial indicator base to detect the perpendicularity of the F-plane of the balance shaft bracket to the reference hole. A threaded hole inspection component cooperates with the first base to detect the positional accuracy, symmetry, and perpendicularity of the first threaded hole to the reference hole. Compared to existing technologies, this balance shaft bracket inspection fixture and testing method 1 enables rapid and efficient inspection of balance shaft brackets produced in batches, while reducing inspection costs. Attached Figure Description

[0039] Figure 1 This is one of the structural schematic diagrams of the balance shaft support fixture provided in an embodiment of the present invention;

[0040] Figure 2 This is a second schematic diagram of the structure of the balance shaft support fixture provided in an embodiment of the present invention;

[0041] Figure 3 This is the third structural schematic diagram of the balance shaft support fixture provided in the embodiments of the present invention;

[0042] Figure 4 This is a schematic diagram of the dial indicator base in an embodiment of the present invention;

[0043] Figure 5 This is a schematic diagram of the structure of the balance shaft bracket in an embodiment of the present invention;

[0044] The attached diagram lists the components represented by each number as follows:

[0045] 1. First base;

[0046] 11. First bearing platform; 111. Positioning column; 112. Bearing seat;

[0047] 12. Second support platform;

[0048] 13. Positioning stage; 131. First detection pin; 132. First through hole; 133. Reference pin; 134. Limit pin hole; 135. Limit pin;

[0049] 2. Threaded hole detection assembly;

[0050] 21. Fourth base; 22. Lever dial indicator; 23. Pin; 24. Fourth detection pin; 25. Symmetry measuring pin;

[0051] 3. Sliding measurement component;

[0052] 31. Second base; 311. Locating pin hole; 312. Locating pin; 313. First base plate;

[0053] 32. Positioning detection plate; 321. Feeler gauge; 322. Second through hole; 323. Second detection pin; 324. Vertical plate;

[0054] 33. Slide rail;

[0055] 34. Limit block;

[0056] 4. Through-hole detection assembly;

[0057] 41. Third base; 411. Side plate; 412. Third through hole; 413. Second bottom plate;

[0058] 42. Third inspection pin;

[0059] 5. Dial indicator base; 51. Dial indicator; 52. First indicator lever; 53. Second indicator lever; 54. Base; 55. Adjusting screw;

[0060] 6. Balance shaft bracket; 61. F surface; 62. Reference hole; 63. First inspection hole; 64. Second inspection hole; 65. First threaded hole; 66. Second threaded hole; 67. M surface. Detailed Implementation

[0061] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0062] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0063] It should be noted that the terms "upper", "lower", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0064] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or order. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0065] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.

[0066] Example 1

[0067] Combination Figure 1 and Figure 5 As shown, the balance shaft bracket inspection fixture provided in this embodiment of the invention includes: a first base 1, a threaded hole inspection component 2, and a dial indicator base 5.

[0068] The first base 1 is provided with a first bearing platform 11, a second bearing platform 12 and a positioning platform 13. The first bearing platform 11 abuts against the balance shaft bracket 6 to support the balance shaft bracket 6. The second bearing platform 12 is located on one side of the first bearing platform 11, and the positioning platform 13 is located on both sides of the second bearing platform 12. The first bearing platform 11 and the positioning platform 13 are located on different sides of the second bearing platform 12. The positioning platform 13 cooperates with the dial indicator base 5 to detect the perpendicularity of the F surface 61 of the balance shaft bracket 6 to the reference hole 62.

[0069] The threaded hole detection component 2 is arranged on one side of the first bearing platform 11 on the same side as the first threaded hole 65. The threaded hole detection component 2 is used to cooperate with the first base 1 to detect the position, symmetry and perpendicularity of the first threaded hole 65 to the reference hole 62.

[0070] It should be noted that in this embodiment, the reference hole 62 is the reference E hole of the balance shaft bracket, the first threaded hole 65 is the M24 threaded hole of the balance shaft bracket, the second threaded hole 66 is the M22 threaded hole of the balance shaft bracket, the first detection hole 63 is the Φ21.5 hole of the balance shaft bracket, and the second detection hole 64 is the Φ18.5 hole of the balance shaft bracket.

[0071] Based on the above embodiments, further, combined with Figure 2 and Figure 5 As shown, the first support platform 11 includes a positioning post 111 and a support seat 112. The positioning post 111 is vertically disposed on the support seat 112. The size of the positioning post 111 is adapted to the size of the reference hole 62. The positioning post 111 is preferably a cylinder so that the balance shaft bracket inspection fixture will not damage the balance shaft bracket 6 when inspecting it. The support seat 112 is disposed on the first support platform 11. The support seat 112 can be a cylinder or a cuboid. The upper surface of the support seat 112 is connected to the positioning post 111. The area of ​​the upper surface is larger than the cross-sectional area of ​​the positioning post 111. The upper surface is used to abut against the plane of the reference hole 62 end of the balance shaft bracket 6, so that the balance shaft bracket 6 can be stably placed on the inspection fixture.

[0072] Based on the above embodiments, the second support platform 12 further includes: a positioning hole and a positioning hole seat. The positioning hole is vertically inserted into the second support platform 12, and the positioning hole seat is provided with a through hole that is adapted to the positioning hole, so that the sliding measuring component 3 can be fixed after the balance shaft bracket 6 to be tested is assembled in a specific position, thereby enabling the next step of testing.

[0073] Based on the above embodiments, further, combined with Figure 1 and Figure 5 As shown, the positioning stage 13 includes: a first detection pin 131, a first through hole 132, and a reference pin 133. The first through hole 132 is vertically disposed on the side of the positioning stage 13 near the first support platform 11. The number of first through holes 132 is consistent with the number of second threaded holes 66 of the balance shaft bracket 6 to be tested. The first detection pin 131 is used to cooperate with the first through hole 132 to detect the position of the second threaded hole 66. The reference pin 133 is vertically disposed on the side of the positioning stage 13 near the second support platform 12. The reference pin 133 is used to provide a positioning reference for the dial indicator base 5 to detect the perpendicularity of the F surface 61 of the balance shaft bracket 6 to the reference hole 62.

[0074] The positioning table 13 also includes a limiting pin hole 134 and a limiting pin 135. The limiting pin hole 134 is vertically inserted into the positioning table 13, and the limiting pin 135 can be inserted into the limiting pin hole 134, so that when the balance shaft bracket 6 is placed on the fixture, the limiting pin 135 can abut against the M surface 67 to limit the balance shaft bracket 6.

[0075] Based on the above embodiments, further, combined with Figure 2 and Figure 5 As shown, the balance shaft bracket inspection fixture also includes a sliding measuring component 3, which is disposed on the second support platform 12. The sliding measuring component 3 is used to cooperate with the first base 1 to position the balance shaft bracket 6 and measure the position of the first detection hole 63.

[0076] Based on the above embodiments, further, combined with Figure 2 and Figure 5 As shown, the sliding measuring assembly 3 includes: a second base 31, a positioning detection plate 32, a slide rail 33, and a limiting block 34. The slide rail 33 is fixedly mounted on the second support platform 12 in the direction toward the first receiving platform. The second base 31 is connected to the slide rail 33, so that the second base 31 can slide along the slide rail 33 on the second support platform 12 to achieve unobstructed placement of the balance shaft bracket 6 in the inspection fixture for inspection. The positioning detection plate 32 is vertically mounted on the end of the second base 31 near the first support platform 11. The positioning detection plate 32 is used to detect the position of the first detection hole 63. The limiting block 34 is mounted on the end of the second support platform 12 away from the first support platform 11, so that the second base 31 will not detach from the sliding measuring assembly 3 along the slide rail 33.

[0077] Based on the above embodiments, further, combined with Figure 1 and Figure 5 As shown, the positioning detection plate 32 includes: a feeler gauge 321, a vertical plate 324, a second through hole 322, and a second detection pin 323. The second through hole 322 is vertically inserted into the vertical plate 324. The number of second through holes 322 is the same as the number of first detection holes 63 of the balance shaft bracket 6 to be tested. The second detection pin 323 is used to cooperate with the second through hole 322 to detect the position of the first detection hole 63. The feeler gauge 321 is inserted into the gap between the vertical plate 324 and the balance shaft bracket 6 and is used to detect the perpendicularity of the plane where the first detection hole 63 is located to the F surface 61 at 4-5 points along the periphery of the sliding measuring base.

[0078] Based on the above embodiments, further, combined with Figure 1 As shown, the second base 31 includes: a first base plate 313, a positioning pin hole 311 and a positioning pin 312. The positioning pin hole 311 is vertically inserted into the first base plate 313. The size of the positioning pin hole 311 matches the size of the positioning hole. When the second base 31 moves to the position where the positioning pin hole 311 corresponds to the positioning hole, the positioning pin 312 is inserted into the positioning pin hole 311, so that the sliding measuring component 3 is in the detection position for the next step of detecting the balance shaft bracket 6.

[0079] Based on the above embodiments, further, combined with Figure 3 and Figure 5 As shown, the balance shaft bracket inspection fixture also includes: a through hole inspection component 4; the through hole inspection component 4 and the second inspection hole 64 of the balance shaft bracket 6 are arranged on the same side of the first support platform 11, and the through hole inspection component 4 is used to cooperate with the first base 1 to detect the position of the second inspection hole 64.

[0080] Based on the above embodiments, further, combined with Figure 3 and Figure 5 As shown, the through-hole detection assembly 4 includes a third base 41 and a third detection pin 42. The third base 41 is provided with a side plate 411 and a second bottom plate 413. The two side plates 411 are respectively vertically arranged at both ends of the second bottom plate 413. The side plates 411 are provided with third through holes 412. The number of third through holes 412 is consistent with the number of second detection holes 64 of the balance shaft bracket 6 to be detected. The size of the third through hole 412 is adapted to the size of the third detection pin 42. The third through hole 412 and the third detection pin 42 cooperate to detect the position of the second detection hole 64. When the balance shaft bracket 6 is in the detection position, its bottom can be placed between the two side plates 411, so that when the balance shaft bracket 6 is in the detection position, the through-hole detection assembly 4 can correspond to the second detection hole 64.

[0081] Based on the above embodiments, further, combined with Figure 3 and Figure 5 As shown, the threaded hole detection assembly 2 includes: a fourth base 21, a lever dial indicator 22, a fourth detection pin 24, and a symmetry measuring pin 25. The fourth base 21 is vertically disposed on the first base 1, and the symmetry measuring pin 25 is vertically disposed at the end of the fourth base 21 away from the first base 1. The fourth detection pin 24 can be inserted into the first threaded hole 65 and is used to detect the position of the first threaded hole 65.

[0082] The aforementioned symmetry measuring pin 25 includes: a pin 23, a groove, and a fourth through hole. The groove is located at the end of the symmetry measuring pin 25 away from the fourth base 21, and this end has a fourth through hole that perpendicularly penetrates the groove. The size of the pin 23 is adapted to the size of the fourth through hole, and the size of the groove is adapted to the size of the fourth detection pin 24. The fourth detection pin 24 can be inserted into the groove of the symmetry measuring pin 25. The through hole on the fourth detection pin 24 corresponds to the fourth through hole. The pin 23 is inserted into the fourth through hole and the through hole. The fourth detection pin 24 is connected to the symmetry measuring pin 25, so that the symmetry measuring pin 25 can drive the fourth detection pin 24 to rotate together. The lever dial indicator 22 is connected to the symmetry measuring pin 25, and the probe of the lever dial indicator 22 contacts the fourth detection pin 24. The lever dial indicator 22 is used to cooperate with the symmetry measuring pin 25 and the fourth detection pin 24 to detect the symmetry and perpendicularity of the first threaded hole 65.

[0083] Based on the above embodiments, further, combined with Figure 4 and Figure 5 As shown, the dial indicator base 5 includes: a dial indicator 51, a first indicator rod 52, a second indicator rod 53, a base 54, and an adjusting screw 55. The first indicator rod 52 is vertically disposed on one side of the base 54, the second indicator rod 53 is vertically disposed on the first indicator rod 52, the adjusting screw 55 is disposed at the end of the second indicator rod 53 near the first indicator rod 52, and the dial indicator 51 is vertically disposed at the end of the second indicator rod 53 away from the first indicator rod 52, so that the dial indicator 51 can move freely on the positioning table 13, thereby measuring the data of the plane parallel to the three M surfaces 67 where the center of the two second threaded holes 66 of the protrusion of the F surface 61 is located.

[0084] Example 2

[0085] This invention also provides a method for detecting the balance shaft bracket 6 using the balance shaft bracket inspection fixture, including:

[0086] The balance shaft bracket 6 is placed on the first base 1, and the first base 1 is engaged with the dial indicator base 5 to check the perpendicularity of the F surface of the balance shaft bracket 6 to the reference hole 62.

[0087] The through-hole detection component 4 is fitted with the first base 1 to detect the position of the second detection hole 64 of the balance shaft bracket 6.

[0088] The sliding measuring component 3 is engaged with the first base 1 to detect the position of the first detection hole 63.

[0089] Push the symmetry measuring pin 25 of the thread hole detection assembly 2 forward, and the fourth detection pin 24 of the thread hole detection assembly 2 will cooperate with the symmetry measuring pin 25. The probe of the lever dial indicator 22 will contact the surface of the fourth detection pin 24. Rotate the symmetry measuring pin 25, and the symmetry measuring pin 25 will drive the fourth detection pin 24 to rotate, thereby detecting the symmetry and perpendicularity of the first thread hole 65 relative to the reference hole 62.

[0090] To facilitate understanding of the structure of the aforementioned balance shaft bracket inspection fixture and its specific usage in actual operation, the aforementioned inspection method specifically includes:

[0091] Step S1: Remove all the detection pins and positioning pins 312 from the fixture, retract the symmetry measuring pin 25, and move the sliding measuring component 3 to the limit block 34 so that all the interference components in the fixture are removed.

[0092] Step S2: The balance shaft bracket 6 is hoisted and placed on the fixture. The positioning pin 111 of the fixture is inserted into the reference hole 62 of the balance shaft bracket 6, so that the plane at the end of the reference hole 62 abuts against the upper surface of the bearing seat 112. The limiting pin 135 is inserted into the limiting pin hole 134. The balance shaft bracket 6 is moved so that the M surface 67 abuts against the limiting pin 135, thus completing the positioning of the balance shaft bracket 6.

[0093] Step S3: Slide the sliding measuring component 3 along the slide rail 33 to the position corresponding to the positioning pin hole 311 and the positioning hole, insert the positioning pin 312, and fix the sliding measuring component 3 on the first base 1.

[0094] Step S4: Insert the first detection pin 131 into the second threaded hole 66 on the balance shaft bracket 6, and the first detection pin 131 can be inserted into the first through hole 132 to detect the position of the ten second threaded holes 66.

[0095] Step S5: Insert the third detection pin 42 into the third through hole 412, and further insert it into the second detection hole 64 to detect the position of the four second detection holes 64.

[0096] Step S6: Insert the second detection pin 323 into the second through hole 322, and further insert it into the first detection hole 63 to detect the position of the four first detection holes 63.

[0097] Step S7: Insert the fourth detection pin 24 into the first threaded hole 65 to detect the position of the first threaded hole 65.

[0098] Step S8: Push the symmetry measuring pin 25 forward until the fourth detection pin 24 is inserted into the groove, align the fourth through hole with the through hole on the fourth detection pin 24, insert the pin 23 into the fourth through hole and the through hole on the fourth detection pin 24, bring the probe of the lever dial indicator 22 into contact with the surface of the fourth detection pin 24, rotate the symmetry measuring pin 25, and observe the degree on the lever dial indicator 22 to detect the symmetry and perpendicularity of the first threaded hole 65 relative to the reference hole 62.

[0099] Step S9: Insert feeler gauge 321 into the gap between positioning detection plate 32 and balance shaft bracket 6, and perform detection at 4-5 points around the periphery of sliding measuring base to detect the perpendicularity of the plane where the first detection hole 63 is located to the F surface 61.

[0100] Step S10: Place the dial indicator base 5 on the positioning table 13. First, connect the probe of the dial indicator 51 to the reference pin 133 to determine the reference value of the dial indicator 51. Then, move the dial indicator base 5 on the positioning table 13 so that the probe of the dial indicator base 5 can move freely on the F surface 61 of the balance shaft bracket 6 to detect the perpendicularity of the F surface 61 to the reference hole 62 and the distance of the three M surfaces 67 from the center of the two second threaded holes 66 of the protrusion of the F surface 61 to the plane parallel to the three M surfaces 67.

[0101] In summary, by using the aforementioned balance shaft bracket inspection fixture and the corresponding inspection method, it is possible to inspect the balance shaft brackets 6 produced in batches for export. This enables rapid inspection, provides high inspection quality, and reduces inspection costs.

[0102] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A balance shaft bracket inspection fixture, characterized in that, include: First base, through hole detection assembly, threaded hole detection assembly and dial indicator base; The first base is provided with a first support platform, a second support platform, and a positioning platform. The first support platform is used to support the balance shaft bracket. The second support platform is located on one side of the first support platform, and the positioning platform is located on both sides of the second support platform. The positioning platform cooperates with the dial indicator base to detect the perpendicularity of the F-plane of the balance shaft bracket to the reference hole. The through-hole detection component is arranged on the same side as the second detection hole of the balance shaft bracket on one side of the first support platform. The through-hole detection component is used to cooperate with the first base to detect the position accuracy of the second detection hole. The threaded hole detection component is arranged on one side of the first bearing platform on the same side as the first threaded hole of the balance shaft bracket. The threaded hole detection component is used to cooperate with the first base to detect the position, symmetry and perpendicularity of the first threaded hole to the reference hole. The first support platform includes: a positioning column and a support base; The positioning post is vertically mounted on the bearing seat, and the size of the positioning post is adapted to the size of the reference hole; The support seat is disposed on the first support platform, the upper surface of the support seat is connected to the positioning column, the area of ​​the upper surface is larger than the cross-sectional area of ​​the positioning column, and the upper surface is used to abut against the balance shaft bracket; The positioning stage includes: a first detection pin, a first through hole, and a reference pin; The first through hole is vertically disposed on the side of the positioning platform near the first bearing platform, and the first detection pin is used to cooperate with the first through hole to detect the position accuracy of the second threaded hole; The reference pin is vertically disposed on the side of the positioning platform near the second bearing platform. The reference pin is used to cooperate with the dial indicator base to detect the perpendicularity of the F surface of the balance shaft bracket to the reference hole. The threaded hole detection assembly includes: a fourth base, a lever dial indicator, a fourth detection pin, and a symmetry measuring pin; The fourth base is vertically disposed on the first base, and the symmetry measuring pin is vertically disposed at the end of the fourth base away from the first base; The fourth detection pin can be inserted into the first threaded hole, and the fourth detection pin is used to detect the position of the first threaded hole. The fourth detection pin is connected to the symmetry measuring pin, so that the symmetry measuring pin can drive the fourth detection pin to rotate together. The lever dial indicator is used in conjunction with the symmetry measuring pin and the fourth detection pin to detect the symmetry and perpendicularity of the first threaded hole.

2. The balance shaft bracket inspection fixture according to claim 1, characterized in that, The second support platform includes: a positioning hole and a positioning hole seat; The positioning hole is perpendicularly inserted into the second support platform, and the positioning hole seat is provided with a through hole, which corresponds to the positioning hole.

3. The balance shaft bracket inspection fixture according to claim 1, characterized in that, The balance shaft support fixture also includes a sliding measuring component; The sliding measuring component is disposed on the second support platform. The sliding measuring component is used to cooperate with the first base to position the balance shaft bracket and measure the position of the first detection hole of the balance shaft bracket.

4. The balance shaft bracket inspection fixture according to claim 3, characterized in that, The sliding measurement component includes: a second base, a positioning detection plate, and a slide rail; The positioning detection plate is vertically disposed at one end of the second base near the first support platform; the slide rail is fixedly disposed on the second support platform in the direction toward the first support platform, and the second base is connected to the slide rail; The positioning detection plate is used to detect the position of the first detection hole.

5. The balance shaft bracket inspection fixture according to claim 1, characterized in that, The through-hole detection assembly includes: a third base and a third detection pin; The third base is provided with side plates and a second bottom plate; the two side plates are respectively vertically arranged at both ends of the second bottom plate, and the bottom of the balance shaft bracket is located between the two side plates; The side plate is provided with a third through hole; the size of the third through hole is adapted to the size of the third detection pin, and the third through hole and the third detection pin are used to detect the position of the second detection hole.

6. The balance shaft bracket inspection fixture according to claim 1, characterized in that, The dial indicator base includes: a dial indicator, a first indicator rod, a second indicator rod, a base, and an adjusting screw; The first gauge rod is vertically disposed on one side of the gauge base, the second gauge rod is vertically disposed on the first gauge rod, the adjusting screw is disposed on the end of the second gauge rod close to the first gauge rod, and the dial indicator is vertically disposed on the end of the second gauge rod away from the first gauge rod.

7. A method for inspecting a balance shaft bracket using the balance shaft bracket inspection fixture as described in any one of claims 1 to 6, characterized in that, include: The balance shaft bracket is placed on the first base, which is in conjunction with the dial indicator base to detect the perpendicularity of the F-plane of the balance shaft bracket to the reference hole. The through-hole detection component is fitted with the first base to detect the position accuracy of the second detection hole of the balance shaft bracket; The symmetry measuring pin of the threaded hole detection assembly is pushed forward, and the fourth detection pin of the threaded hole detection assembly engages with the symmetry measuring pin. The probe of the lever dial indicator contacts the surface of the fourth detection pin. The symmetry measuring pin is rotated, and the symmetry measuring pin drives the fourth detection pin to rotate, thereby detecting the symmetry and perpendicularity of the first threaded hole relative to the reference hole.

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