A testing tool for detecting the height of the end face of a differential case

Abstract

The utility model discloses a detection tool of detecting differential shell end face height, including base, be provided with first detection subassembly and second detection subassembly on the base, first detection subassembly includes first locating bushing, first support and first detection table, first locating bushing and first support all set up on the base, and the upper end of first support is rotatedly connected with the middle part of first lever, and one end of first lever is first lever measuring head and is located the top of first locating bushing, and the upper surface of the other end of first lever is contacted with the detection contact of first detection table, first detection table sets up on first support, the inner diameter of first locating bushing is matched with the outer diameter of small head half shaft hole of differential shell, second detection subassembly includes second locating bushing, second support and second detection table, the utility model solves the problem that the differential shell detection efficiency is low, and the precision consistency is poor, and the detection tool is difficult to be compatible with multiple models, realizes the quick clamping of can, the synchronous measurement of multiple sizes, and improves the detection precision and efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of automotive parts testing equipment, specifically relating to a gauge for detecting the height of the end face of a differential housing. Background Technology

[0002] In the machining process, the differential housing (referred to as "differential housing") is a core component of the automotive rear axle reducer. For example... Figure 5 As shown, the existing differential housing has a larger end (larger head) and a smaller end (smaller head) with a spherical inner cavity in the middle. Half-shaft holes are provided at both the large and small ends. The dimensional accuracy of these holes, such as diameter and end face height, directly affects assembly accuracy and transmission stability.

[0003] In existing technologies, traditional methods involve multiple measurements and calculations using tools such as calipers and height gauges. This requires separate measurements with calipers and micrometers, and each measurement necessitates multiple clamping and tool switching, resulting in significant time consumption. Furthermore, manual operation leads to large errors, with measurement results from different inspectors fluctuating considerably and exhibiting poor accuracy consistency. Current methods using gauges, typically coordinate measuring machines (CMMs), employ universal magnetic V-blocks for positioning. These V-blocks contact the pre-machined, regular surface of the workpiece, relying on magnetic force to stabilize the workpiece. However, these gauges are generally custom-made for a single size, making them unsuitable for different models of workpieces, resulting in poor compatibility and requiring frequent replacement of positioning components, thus hindering overall inspection efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a fixture for detecting the height of the end face of a differential shell, which solves the problems of low detection efficiency, poor accuracy consistency, and difficulty in compatibility of multiple models in existing detection schemes, and enables rapid clamping and simultaneous measurement of multiple dimensions, thereby improving detection accuracy and efficiency.

[0005] According to the technical solution of this utility model, this utility model provides a gauge for detecting the height of the end face of a differential housing, including a base, on which a first detection component and a second detection component are disposed; the first detection component includes a first positioning bushing, a first bracket, and a first detection gauge; the first positioning bushing and the first bracket are both disposed on the base, the upper end of the first bracket is rotatably connected to the middle of a first lever, one end of the first lever is a first lever probe located above the first positioning bushing, and the upper surface of the other end of the first lever is in contact with the detection contact of the first detection gauge; the first detection gauge is disposed on the first bracket; the inner diameter of the first positioning bushing is equal to the small end half of the differential housing. The outer diameter of the shaft hole is matched; the second detection component includes a second positioning bushing, a second bracket, and a second detection gauge; both the second positioning bushing and the second bracket are mounted on the base, the upper end of the second bracket is rotatably connected to the middle of the second lever, one end of the second lever is the second lever probe, the side of the second positioning bushing has a through clearance space for accommodating the second lever probe, the second lever probe passes through the clearance space and is located inside the second positioning bushing; the upper surface of the other end of the second lever is in contact with the detection contact of the second detection gauge; the second detection gauge is mounted on the second bracket; the inner diameter of the second positioning bushing matches the outer diameter of the large-head half-shaft hole of the differential housing.

[0006] In some implementations, the first bracket and / or the second bracket are slidably connected to the base via a slide rail.

[0007] In some embodiments, the upper end of the first bracket is provided with an upward-opening first lever receiving groove, the first lever is located in the first lever receiving groove, a first mounting block is installed and connected above the first lever receiving groove, the first mounting block is provided with a first contact clearance hole that runs vertically through the first mounting block, the first test gauge is connected to the first mounting block, and the test contact of the first test gauge passes through the first contact clearance hole from top to bottom.

[0008] In some embodiments, the upper end of the second bracket is provided with an upward-opening second lever receiving groove, the second lever is located in the second lever receiving groove, a second mounting block is installed and connected above the second lever receiving groove, the second mounting block is provided with a second contact clearance hole that runs vertically through the second mounting block, the second test gauge is connected to the second mounting block, and the test contact of the second test gauge passes through the second contact clearance hole from top to bottom.

[0009] In some embodiments, the first lever probe has a downwardly protruding first detection protrusion with a spherical lower surface, and the position of the first detection protrusion corresponds to the end face of the large-head half-shaft hole of the differential housing that is matched and placed on the first positioning bushing.

[0010] In some embodiments, the second lever probe has an upwardly projecting second detection protrusion with a spherical upper surface, and the position of the second detection protrusion corresponds to the end face of the large-head half-shaft hole of the differential housing that is matched and placed on the second positioning bushing.

[0011] In some embodiments, the base is provided with multiple base positioning pin holes, and the first positioning bushing and the second positioning bushing are each provided with multiple bushing positioning pin holes distributed circumferentially. Multiple positioning pins pass through the bushing positioning pin holes and the base positioning pin holes respectively, so that the first positioning bushing and the second positioning bushing are connected to the base by positioning pins.

[0012] In some implementations, cushioning feet are provided at the four corners of the base.

[0013] Compared with the prior art, the beneficial technical effects of this utility model are as follows: This utility model discloses a fixture for detecting the end face height of a differential housing. A positioning bushing is used to hold the differential housing to be tested. While placing the housing, the bushing also acts as a go gauge, checking if the outer diameter of the housing's half-shaft hole is within acceptable limits. If the diameter is too large or has protrusions, the positioning bushing cannot be inserted. After positioning, the position of the differential housing is fixed and clear. The end face height is measured using a gauge, enabling rapid positioning, clamping, testing, and removal of the housing. Furthermore, multiple measurements show good consistency between measurements of different differential housings. The gauge uses a lever for indirect testing, avoiding spatial interference between the gauge and the positioning bushing. The gauge can be fixedly positioned relative to the fixture, facilitating testing and removal of the tested housing. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the inspection tool provided by this utility model.

[0015] Figure 2 This is a three-dimensional structural diagram of the inspection tool provided by this utility model after the differential shell has been placed.

[0016] Figure 3 yes Figure 2 A schematic diagram of a three-dimensional structure from another angle, with some parts in perspective.

[0017] Figure 4 yes Figure 2 Another perspective view of a three-dimensional structure.

[0018] Figure 5 This is a schematic diagram of the three-dimensional structure of the shell.

[0019] Explanation of reference numerals in the attached figures: 100. Base; 11. First positioning bushing; 12. First bracket; 121. First lever receiving groove; 122. First mounting block; 13. First gauge; 14. First lever; 141. First lever probe; 142. First detection protrusion; 21. Second positioning bushing; 211. Clearance space; 22. Second bracket; 221. Second lever receiving groove; 222. Second mounting block; 23. Second gauge; 24. Second lever; 241. Second lever probe; 242. Second detection protrusion; 30. Differential housing; 31. Small end half-shaft hole; 32. Large end half-shaft hole; 41. Base positioning pin hole; 42. Bushing positioning pin hole; 43. Positioning pin; 5. Buffer foot; 6. Calibration block. Detailed Implementation

[0020] This invention provides a fixture for detecting the height of the end face of a differential shell, which solves the problems of low efficiency, poor accuracy consistency, and difficulty in compatibility of fixtures with multiple models in existing detection schemes. It enables rapid clamping and simultaneous measurement of multiple dimensions, thereby improving detection accuracy and efficiency.

[0021] Please see Figures 1 to 5 This utility model discloses a gauge for detecting the height of a shell end face, comprising a base 100. The base 100 is preferably a flat plate structure made of, for example, 6061 aviation aluminum. Buffer feet 5 are preferably provided at the four corners of the bottom of the base 100. The base 100 serves to support all components and ensure overall stability. A first detection component and a second detection component are provided on the base 100.

[0022] The first detection assembly includes a first positioning bushing 11, a first bracket 12, and a first detection gauge 13. The first positioning bushing 11 and the first bracket 12 are both mounted on the base 100. The first bracket 12 is located on one side of the first positioning bushing 11. The upper end of the first bracket 12 is rotatably connected to the middle of the first lever 14 so that the first lever 14 can be flipped in a vertical or near-vertical direction. One end of the first lever 14 is the first lever probe 141 and is located above the first positioning bushing 11. The upper surface of the other end of the first lever 14 is in contact with the detection contact of the first detection gauge 13. The first detection gauge 13 is mounted on the first bracket 12. The inner diameter of the first positioning bushing 11 (which is a cylindrical structure) matches the outer diameter of the small-head half-shaft hole 31 of the differential housing 30.

[0023] The small-end half-shaft hole 31 of the differential housing 30 is placed into the first positioning bushing 11. The first positioning bushing 11 serves two purposes: firstly, it positions the differential housing 30 onto the gauge for subsequent inspection; secondly, it acts as a go gauge, simultaneously checking whether the outer diameter and outer surface of the small-end half-shaft hole 31 of the differential housing 30 meet the requirements. If the outer surface diameter of the small-end half-shaft hole 31 is too large or has irregularities, it cannot be placed into the first positioning bushing 11. This allows for a quick preliminary screening of the differential housing 30. After the small-end half-shaft hole 31 of the differential housing 30 is properly placed into the first positioning bushing 11, the remaining part of the differential housing 30 rests against the upper surface of the first positioning bushing 11, thus completing its positioning in the first inspection assembly. Subsequently, the first lever probe 141 contacts the end face (upper surface) of the large-end half-shaft hole 32 of the differential housing 30, thereby reflecting the height of the end face of the differential housing 30 (excluding the height of the small-end half-shaft hole 31 portion) on the first inspection gauge 13. As a supplementary explanation, the height and position of the first positioning bushing 11, the first bracket 12, the first measuring gauge 13, etc. are designed according to the standard differential housing 30 so as to be able to detect the required height dimensions.

[0024] The second detection component includes a second positioning bushing 21, a second bracket 22, and a second detection gauge 23. Both the second positioning bushing 21 and the second bracket 22 are mounted on the base 100. The second bracket 22 is located on one side of the second positioning bushing 21, and its upper end is rotatably connected to the middle of the second lever 24, allowing the second lever 24 to rotate in a vertical or near-vertical direction. One end of the second lever 24 is a second lever probe 241. The side of the second positioning bushing 21 has a through-hole clearance space 211 for accommodating the second lever probe 241 (e.g., a space for clearance). Figure 4 , Figure 5 As shown, the clearance space 211 is formed by a vertical slot on the second positioning bushing 21. The second lever probe 241 passes through the clearance space 211 and is located inside the second positioning bushing 21. The upper surface of the other end of the second lever 24 is in contact with the detection contact of the second detection gauge 23. The second detection gauge 23 is set on the second bracket 22. The inner diameter of the second positioning bushing 21 (which is a cylindrical structure) matches the outer diameter of the large-head half-shaft hole 32 of the differential housing 30.

[0025] The large-end half-shaft hole 32 of the differential housing 30 is placed into the second positioning bushing 21. The second positioning bushing 21 serves two purposes: firstly, it positions the differential housing 30 onto the gauge for subsequent inspection; secondly, it acts as a go gauge, simultaneously checking whether the outer diameter and outer surface of the large-end half-shaft hole 32 of the differential housing 30 meet the requirements. If the outer surface diameter of the large-end half-shaft hole 32 is too large or has irregularities, it cannot be placed into the second positioning bushing 21. This allows for a quick preliminary screening of the differential housing 30. After the large-end half-shaft hole 32 of the differential housing 30 is properly placed into the second positioning bushing 21, the remaining part of the differential housing 30 rests against the upper surface of the second positioning bushing 21, thus completing its positioning in the second inspection assembly. Subsequently, the second lever probe 241 contacts the end face (lower surface) of the large-end half-shaft hole 32 of the differential housing 30 from below, thereby reflecting the height of the end face of the differential housing 30 (the height of the large-end half-shaft hole 32 portion) on the second inspection gauge 23. As a supplementary explanation, the height and position of the second positioning bushing 21, the second bracket 22, the second gauge 23, etc. are designed according to the standard differential housing 30 so as to be able to detect the required height dimensions.

[0026] Please see Figure 1 The system also includes a calibration block 6. Taking the second detection component as an example, the calibration block 6 is inverted "convex" shape, used to simulate the large half-shaft hole 32 of the standard differential housing 30 and the connected rest. By placing the calibration block 6 on the second positioning bushing 21, the second detection gauge 23 can be adjusted to the desired reading, such as zeroing it. Similarly, the first detection component also has a corresponding calibration block. The calibration block 6 can also be a standard part of the differential housing 30.

[0027] Preferably, the first bracket 12 and / or the second bracket 22 are slidably connected to the base 100 via a slide rail. The slide rail is mounted on the base 100, and the lower end of the first bracket 12 or the second bracket 22, which slides along the slide rail, has a matching slider. The length direction of the slide rail is configured to allow the first bracket 12 or the second bracket 22 to slide away from and towards the corresponding first positioning bushing 11 and second positioning bushing 21. This design facilitates adjustment and adaptability to different models of differential housings. Furthermore, for the first detection component, sliding the first bracket 12 can quickly create space above the first positioning bushing 11 to place or remove the differential housing 30. It is conceivable that in other embodiments, the first bracket 12 and / or the second bracket 22 are detachably connected to the base 100 by bolts, and the base 100 has a strip-shaped hole or multiple holes, thereby also enabling positional adjustment.

[0028] Furthermore, the upper end of the first bracket 12 is provided with an upward-opening first lever receiving groove 121, and the first lever 14 is located within the first lever receiving groove 121. A first mounting block 122 is installed and connected above the first lever receiving groove 121. The first mounting block 122 has a through-hole for the first contact clearance. The first gauge 13 is connected to the first mounting block 122, and the detection contact of the first gauge 13 passes through the first contact clearance hole from top to bottom. This design facilitates the installation of the structure, the first gauge 12 is fixed relative to the first bracket 12, operation is convenient, and the accuracy of the detection is guaranteed.

[0029] Similarly, the upper end of the second bracket 22 is provided with an upward-opening second lever receiving groove 221, the second lever 24 is located in the second lever receiving groove 221, and a second mounting block 222 is installed and connected above the second lever receiving groove 221. The second mounting block 222 has a second contact clearance hole that runs vertically through it. The second detection gauge 23 is connected to the second mounting block 222, and the detection contact of the second detection gauge 23 passes through the second contact clearance hole from top to bottom.

[0030] Preferably, the first lever probe 141 has a downwardly protruding first detection protrusion 142, the lower surface of which is spherical. The position of the first detection protrusion 142 corresponds to the end face of the large-end half-shaft hole 32 of the differential housing 30, which is matched and placed on the first positioning bushing 11. Using a smooth spherical surface as the detection end of the first lever probe 141 reduces friction and ensures accurate contact with the end face of the differential housing 30 even when the first lever 14 is tilted. Additionally, for a straight first lever 14 structure, it is approximately horizontal during detection.

[0031] Similarly, the second lever probe 241 has an upwardly protruding second detection protrusion 242, the upper surface of which is spherical, and the position of the second detection protrusion 242 corresponds to the end face of the large end half shaft hole 32 of the differential housing 30, which is matched and placed on the second positioning bushing 21.

[0032] Please see Figure 3 Preferably, the base 100 has multiple base positioning pin holes 41, and the first positioning bushing 11 and the second positioning bushing 21 each have multiple bushing positioning pin holes 42 distributed circumferentially. Multiple positioning pins 43 pass through the bushing positioning pin holes 42 and the base positioning pin holes 41 respectively, so that the first positioning bushing 11 and the second positioning bushing 21 are connected to the base 100 by the positioning pins 43. Both the first positioning bushing 11 and the second positioning bushing 21 are detachably connected and circumferentially positioned by multiple positioning pins 43. This facilitates the replacement of the corresponding positioning bushing according to the shell structure to be tested, and ensures convenient and accurate installation of the positioning bushing.

[0033] In summary, this utility model provides a fixture for detecting the end face height of a differential housing. A positioning bushing is used to hold the differential housing to be tested. While placing the housing, the bushing also acts as a go gauge, checking if the outer diameter of the housing's half-shaft hole is within acceptable limits. If the diameter is too large or has protrusions, the positioning bushing cannot be inserted. After positioning, the position of the differential housing is fixed and clear. The end face height is measured using a gauge, enabling rapid positioning, clamping, testing, and removal of the housing. Furthermore, multiple measurements show good consistency between different differential housings being tested. More specifically, the positioning bushing is matched to the specifications of the differential housing. The positioning bushing is typically cylindrical and mates with the housing's reference hole (half-shaft hole) to ensure consistent installation position. The positioning bushing preferably uses a quick-change structure to accommodate the positioning needs of more differential housing models. The gauge uses a lever for indirect testing, avoiding spatial interference between the gauge and the positioning bushing. The gauge can be fixedly positioned relative to the fixture, facilitating testing and removal of the tested differential housing. More specifically, the measuring instruments, such as dial indicators and micrometers, are preferably digital measuring instruments capable of automatic data recording and uploading. The measuring probe of the measuring instrument is essentially perpendicular to the top surface of the differential housing and is used to measure the height dimension. The measuring instrument is equipped with a locking structure to fix the measurement position on the corresponding bracket to ensure data stability. Overall, this solution matches different bushings according to the diameter and height of the differential housing being measured, and uses the measuring instrument to measure the height of different end faces to determine whether the height dimension is qualified. It is compatible with different models and applicable to the inspection of differential housings with different apertures and heights. In terms of efficiency improvement, since the outer diameter and height can be measured simultaneously in a single clamping, the inspection time can be reduced by more than 60%. In terms of accuracy, through the cooperation of the positioning bushing and the measuring instrument, the measurement error can be controlled within ±0.02mm, significantly improving consistency.

Claims

1. A gauge for detecting the height of the end face of a differential shell, characterized in that, Includes a base (100), on which a first detection component and a second detection component are provided; The first detection component includes a first positioning bushing (11), a first bracket (12), and a first detection gauge (13); the first positioning bushing (11) and the first bracket (12) are both mounted on the base (100), the upper end of the first bracket (12) is rotatably connected to the middle of the first lever (14), one end of the first lever (14) is the first lever probe (141) and is located above the first positioning bushing (11), and the upper surface of the other end of the first lever (14) is in contact with the detection contact of the first detection gauge (13); the first detection gauge (13) is mounted on the first bracket (12); the inner diameter of the first positioning bushing (11) matches the outer diameter of the small end half shaft hole (31) of the differential housing (30); The second detection component includes a second positioning bushing (21), a second bracket (22), and a second detection gauge (23). The second positioning bushing (21) and the second bracket (22) are both mounted on the base (100). The upper end of the second bracket (22) is rotatably connected to the middle of the second lever (24). One end of the second lever (24) is the second lever probe (241). The side of the second positioning bushing (21) has a through clearance space (211) for accommodating the second lever probe (241). The second lever probe (241) passes through the clearance space (211) and is located inside the second positioning bushing (21). The upper surface of the other end of the second lever (24) is in contact with the detection contact of the second detection gauge (23). The second detection gauge (23) is mounted on the second bracket (22). The inner diameter of the second positioning bushing (21) matches the outer diameter of the large-head half-shaft hole (32) of the differential housing (30).

2. The gauge for detecting the height of the end face of a differential shell according to claim 1, characterized in that, The first bracket (12) and / or the second bracket (22) are slidably connected to the base (100) via a slide rail.

3. The gauge for detecting the height of the end face of a differential shell according to claim 1, characterized in that, The upper end of the first bracket (12) is provided with an upward-opening first lever receiving groove (121), the first lever (14) is located in the first lever receiving groove (121), and a first mounting block (122) is installed and connected above the first lever receiving groove (121). The first mounting block (122) is provided with a first contact clearance hole that runs through the top and bottom. The first test gauge (13) is connected to the first mounting block (122), and the test contact of the first test gauge (13) passes through the first contact clearance hole from top to bottom.

4. The gauge for detecting the height of the end face of a differential shell according to claim 1, characterized in that, The upper end of the second bracket (22) is provided with an upward-opening second lever receiving groove (221). The second lever (24) is located in the second lever receiving groove (221). A second mounting block (222) is installed and connected above the second lever receiving groove (221). A second contact clearance hole is opened on the second mounting block (222) that runs through the top and bottom. The second test gauge (23) is connected to the second mounting block (222). The test contact of the second test gauge (23) passes through the second contact clearance hole from top to bottom.

5. The gauge for detecting the height of the end face of a differential shell according to claim 1, characterized in that, The first lever probe (141) has a downward protruding first detection protrusion (142), the lower surface of which is spherical, and the position of the first detection protrusion (142) corresponds to the end face of the large half shaft hole (32) of the differential housing (30) which is matched and placed on the first positioning bushing (11).

6. The gauge for detecting the height of the end face of a differential shell according to claim 1, characterized in that, The second lever probe (241) has an upwardly protruding second detection protrusion (242), the upper surface of which is spherical, and the position of the second detection protrusion (242) corresponds to the end face of the large half shaft hole (32) of the differential housing (30) which is matched and placed on the second positioning bushing (21).

7. The gauge for detecting the height of the end face of a shell according to any one of claims 1 to 6, characterized in that, The base (100) has multiple base positioning pin holes (41), and the first positioning bushing (11) and the second positioning bushing (21) are each provided with multiple bushing positioning pin holes (42) distributed circumferentially. Multiple positioning pins (43) pass through the bushing positioning pin holes (42) and the base positioning pin holes (41) respectively, so that the first positioning bushing (11) and the second positioning bushing (21) are connected to the base (100) by the positioning pins (43).

8. The gauge for detecting the height of the end face of a shell according to any one of claims 1 to 6, characterized in that, Buffer feet (5) are provided at the four corners of the bottom of the base (100).

Images