A differential half shaft gear backlash detection device

Abstract

The utility model discloses a differential mechanism half axle gear gap detection device, its characterized in that: including work table, measuring mechanism, compacting mechanism, thrust reset mechanism, open mechanism, with the upper positioning assembly and lower positioning assembly of differential mechanism cooperation. The utility model structure has compact overall structure, and strong compatibility, and convenient and fast operation, and adjustment function is convenient, can be suitable for a variety of model differential mechanism half axle gear gap detection, saves production manufacturing cost, and has higher equipment practicality and comprehensive utilization rate simultaneously.

Description

Technical Field

[0001] This utility model relates to a differential half-shaft gear clearance detection device, belonging to the field of automotive parts testing technology. Background Technology

[0002] In the automotive industry as a whole, the market has increasingly higher requirements for the precision, quality and other performance of differentials. Among them, the clearance of the half-shaft gear is a key control indicator. This is because a reasonable clearance can ensure smooth power transmission and reduce frictional resistance. Excessive clearance may lead to abnormal noises, increased jerking, and even affect steering control. Conversely, insufficient clearance may cause excessive friction, resulting in power loss and increased handling resistance.

[0003] Currently, there are two main methods for detecting the clearance of axle gears in the industry: one is to use feeler gauges to measure the clearance between the axle gear and the planetary gear. This method is cumbersome to operate, cannot be read directly, has a large error, and is labor-intensive; the other is to use dedicated testing equipment, which has a high degree of automation and stable testing quality, but the investment cost is high. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a differential half-shaft gear clearance detection device, which has a compact overall structure, strong compatibility, convenient and quick operation, convenient adjustment function, and can be applied to the clearance detection of various models of differential half-shaft gears, saving production and manufacturing costs, while having high equipment practicality and comprehensive utilization rate.

[0005] The technical solution adopted by this utility model is: a differential half-shaft gear clearance detection device, characterized in that: it includes a worktable, a measuring mechanism, a clamping mechanism, a thrust reset mechanism, a spreading mechanism, an upper positioning component and a lower positioning component that cooperate with the differential; The workbench includes a bed, and a button box is fixed on the side of the bed; The clamping mechanism includes a base, which is screwed to the working surface of the workbench. An L-shaped support is provided on the base, and a limit pad is screwed to the side of the L-shaped support. A T-shaped mounting plate is provided above the limit pad. A first cylinder mounting plate is provided on the upper surface of the L-shaped support. A locking clamping cylinder is provided on the first cylinder mounting plate. The locking clamping cylinder passes through a positioning hole on the first cylinder mounting plate. The piston rod of the locking clamping cylinder is connected to the lower cylinder connecting seat. The cylinder connecting seat and the guide positioning seat are located on the upper surface of the horizontal plane of the T-shaped mounting plate. The thrust reset mechanism includes a guide sleeve, inside which is a spline sleeve. The outer diameter of the spline sleeve is axially slidably fitted with the guide sleeve. A connecting rod is provided at the upper end of the spline sleeve, and the connecting rod is connected to the spline sleeve by a connecting pin. The connecting pin slides in keyways on both sides inside the guide sleeve. A double-ear pull plate is provided at the upper end of the guide sleeve, and a second cylinder mounting plate is provided at the upper end of the double-ear pull plate. A thrust reset cylinder is provided on the second cylinder mounting plate, passing through a positioning hole on the second cylinder mounting plate. The piston rod of the thrust reset cylinder is connected to the connecting rod at the lower end. A push rod support is provided at the upper end of the thrust reset cylinder, and a reset spring is sleeved on the cylindrical rod of the push rod support. The expansion mechanism includes a tensioning sleeve, inside which is a mandrel. A sliding sleeve is fitted on the upper outer diameter of the mandrel, and the sliding sleeve is axially slidably engaged with both the outer diameter of the mandrel and the inner diameter of the tensioning sleeve. A compression spring is fitted on the lower part of the mandrel, and a limit ring is provided at the lower end of the compression spring. A tapered sleeve is provided at the lower end of the limit ring, and an open-ended ring is provided at the lower end of the tapered sleeve. The open-ended ring has a split structure and is engaged in a groove at the lower end of the mandrel. A fixing block is provided on the lower end face of the mandrel. A limiting pin passes through a groove hole on the tensioning sleeve and the mandrel. The measuring mechanism includes a C-shaped base, with a dial indicator mounting base at the upper end of the C-shaped base. A digital dial indicator is clamped and fixed in the dial indicator mounting base, and the probe of the digital dial indicator passes through the positioning hole of the C-shaped base. Support seats are symmetrically arranged on both sides of the lower end of the C-shaped base, and a pull cylinder is arranged at the upper end of the support seat. The pull cylinder passes through the positioning hole on the support seat, and the piston rod of the pull cylinder is connected to the pull rod. The pull rod cooperates with the slots on both sides of the double-ear pull plate. The lower positioning component includes a lower tire fixing seat, which is screwed to the working surface of the base of the pressing mechanism. A lower positioning seat is provided at the upper end of the lower tire fixing seat. The lower end stop of the lower positioning seat is matched with the inner hole of the lower tire fixing seat. A first pull pin mounting block is symmetrically provided on both sides of the lower positioning seat. The first pull pin mounting block is screwed and fixed to the upper end of the lower tire fixing seat. A self-locking pull pin is provided on the first pull pin mounting block. The upper positioning component includes an upper tire fixing seat, and the lower end of the upper tire fixing seat is parallel to the horizontal plane of the T-shaped mounting plate of the pressing mechanism. The upper tire fixing seat is fixed by screw thread. An upper positioning seat is provided at the lower end of the upper tire fixing seat. The upper end stop of the upper positioning seat is matched with the inner hole of the upper tire fixing seat. Second pull pin mounting blocks are symmetrically arranged on both sides of the upper positioning seat. The second pull pin mounting blocks are screwed and fixed on both sides of the upper tire fixing seat. A self-locking pull pin is provided on the second pull pin mounting block.

[0006] Furthermore: The L-shaped support and the T-shaped mounting plate are connected by a linear guide rail assembly. The upper slider of the linear guide rail assembly is screwed to the T-shaped mounting plate, and the lower guide rail is screwed to the side of the L-shaped support.

[0007] Furthermore: the locking clamping cylinder is model BES50×200.

[0008] Furthermore: the thrust reset cylinder model is ACQ40×20S.

[0009] Furthermore: the model of the drawing cylinder is ACQ20×10S.

[0010] The advantages and positive effects of this utility model are as follows: The differential half-shaft gear clearance detection device of this utility model has an upper and lower positioning seat on its bed for positioning and supporting the differential, as well as a tensioning mechanism for tightening the inner hole of the half-shaft gear. By replacing the corresponding positioning seat and tensioning mechanism, the positioning and tensioning requirements of different models of differentials can be met, achieving compatible detection functionality. Therefore, its structure is simple, its design is reasonable, its operation is convenient and quick, and its positioning is accurate. It enables the detection of half-shaft gear clearance for multiple models of differentials with a single device, exhibiting strong compatibility, saving equipment investment, and thus reducing product processing and manufacturing costs. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings.

[0012] Figure 1 This is a schematic diagram of the differential structure; Figure 2 This is a schematic diagram of the structure of this utility model; Figure 3 yes Figure 2 Schematic diagram of the middle workbench structure; Figure 4 yes Figure 2 Schematic diagram of the intermediate clamping mechanism; Figure 5 yes Figure 2 Schematic diagram of the medium thrust reset mechanism; Figure 6 yes Figure 5 A half-section diagram of the thrust reset mechanism; Figure 7 yes Figure 2 Schematic diagram of the expansion mechanism; Figure 8 yes Figure 7 A schematic diagram of the half-section structure of the expansion mechanism; Figure 9 yes Figure 2 Schematic diagram of the measuring mechanism; Figure 10 yes Figure 2 Mid-low positioning component; Figure 11 yes Figure 2 Mid-to-upper positioning component; Figure 12This is a schematic diagram of the cooperation structure between the expansion mechanism and the thrust reset mechanism; Figure 13 This is a schematic diagram of the cooperation structure between the measuring mechanism and the thrust reset mechanism.

[0013] Explanation of the numbers in the diagram: 100 is the differential housing, 200 is the half-shaft gear, 300 is the planetary gear, 400 is the slotted shaft, 1 is the worktable, 2 is the lower positioning assembly, 3 is the upper positioning assembly, 4 is the measuring mechanism, 5 is the clamping mechanism, 6 is the thrust reset mechanism, 7 is the expansion mechanism, 8 is the bed, 9 is the button box, 10 is the base, 11 is the limit pad, 12 is the L-shaped support, 13 is the T-shaped mounting plate, 14 is the linear guide rail assembly, 15 is the first cylinder mounting plate, 16 is the locking clamping cylinder, 17 is the cylinder connecting seat, 18 is the guide positioning seat, 19 is the guide sleeve, 20 is the double-ear pull plate, 21 is the second cylinder mounting plate, and 22 is the thrust reset cylinder. 23 is the top rod support, 24 is the return spring, 25 is the connecting rod, 26 is the connecting pin, 27 is the spline sleeve, 28 is the tensioning sleeve, 29 is the spindle, 30 is the sliding sleeve, 31 is the limit pin, 32 is the compression spring, 33 is the limit retaining ring, 34 is the conical sleeve, 35 is the open retaining ring, 36 is the fixing block, 37 is the support seat, 38 is the pull rod, 39 is the pull cylinder, 40 is the C-type seat, 41 is the dial indicator fixing seat, 42 is the digital dial indicator, 43 is the lower tire fixing seat, 44 is the lower positioning seat, 45 is the first pull pin mounting block, 46 is the self-locking pull pin, 47 is the upper positioning seat, 48 is the upper tire fixing seat, and 49 is the second pull pin mounting block. Detailed Implementation

[0014] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0015] like Figure 1-13 As shown, this utility model discloses a differential half-shaft gear backlash detection device, which includes a worktable 1, a measuring mechanism 4, a clamping mechanism 5, a thrust reset mechanism 6, a spreading mechanism 7, an upper positioning component 2 and a lower positioning component 3 that cooperate with the differential. The workbench 1 includes a bed 8, and a button box 9 is fixed on the side of the bed 8; The clamping mechanism 5 includes a base 10, which is screwed to the working surface of the bed 8 of the worktable 1. An L-shaped support 12 is provided on the base 10. A limit pad 11 is screwed to the side of the L-shaped support 12. A T-shaped mounting plate 13 is provided above the limit pad 11. A first cylinder mounting plate 15 is provided on the upper end face of the L-shaped support 12. A locking clamping cylinder 16 is provided on the first cylinder mounting plate 15. The locking clamping cylinder 16 passes through the positioning hole on the first cylinder mounting plate 15. The piston rod of the locking clamping cylinder 16 is connected to the lower cylinder connecting seat 17. The cylinder connecting seat 17 and the guide positioning seat 18 are located on the upper end face of the horizontal plane of the T-shaped mounting plate 13. The thrust reset mechanism 6 includes a guide sleeve 19, inside which a spline sleeve 27 is provided. The outer diameter of the spline sleeve 27 is axially slidably fitted with the guide sleeve 19. A connecting rod 25 is provided at the upper end of the spline sleeve 27. The connecting rod 25 is connected to the spline sleeve 27 by a connecting pin 26, which slides in the keyways on both sides inside the guide sleeve 19. A double-ear pull plate 20 is provided at the upper end of the guide sleeve 19. A second cylinder mounting plate 21 is provided at the upper end of the double-ear pull plate 20. A thrust reset cylinder 22 is provided on the second cylinder mounting plate 21. The thrust reset cylinder 22 passes through a positioning hole on the second cylinder mounting plate 21. The piston rod of the thrust reset cylinder 22 is connected to the connecting rod 25 at the lower end. A push rod support 23 is provided at the upper end of the thrust reset cylinder 22. A reset spring 24 is sleeved on the cylindrical rod of the push rod support 23. The expansion mechanism 7 includes a tensioning sleeve 28, inside which a spindle 29 is disposed. A sliding sleeve 30 is fitted on the upper outer diameter of the spindle 29, and the sliding sleeve 30 is axially slidably engaged with the outer diameter of the spindle 29 and the inner diameter of the tensioning sleeve 28 respectively. A compression spring 32 is sleeved on the lower part of the spindle 29, and a limit ring 33 is provided at the lower end of the compression spring 32. A tapered sleeve 34 is provided at the lower end of the limit ring 33, and an open ring 35 is provided at the lower end of the tapered sleeve 34. The open ring 35 has a split structure and is engaged in the groove at the lower end of the spindle 29. A fixing block 36 is provided on the lower end face of the spindle 29. A limiting pin 31 passes through the groove hole on the tensioning sleeve 29 and the spindle 29. The measuring mechanism includes a C-shaped base 40, with a dial indicator fixing base 41 at the upper end of the C-shaped base 40. A digital dial indicator 42 is clamped and fixed in the dial indicator fixing base 41, and the probe of the digital dial indicator 42 passes through the positioning hole of the C-shaped base 40. Support bases 37 are symmetrically arranged on both sides of the C-shaped base 40, and a pull cylinder 39 is arranged at the upper end of the support base 37. The pull cylinder 39 passes through the positioning hole on the support base 37, and the piston rod of the pull cylinder 39 is connected to the pull rod 38. The pull rod is I-shaped and fits tightly with the slot on the double-ear pull plate. The upper and lower ends of the I-shaped pull rod clamp the double-ear pull plate. The lower positioning component 2 includes a lower tire fixing seat 43, which is connected to the working surface of the base 10 of the pressing mechanism 5. The lower tire fixing seat 43 is fixed by screwing. A lower positioning seat 44 is provided at the upper end of the lower tire fixing seat 43. The lower end stop of the lower positioning seat 44 is engaged with the inner hole of the lower tire fixing seat 43. A first pull pin mounting block 45 is symmetrically provided on both sides of the lower positioning seat 44. The first pull pin mounting block 45 is screwed and fixed to the upper end of the lower tire fixing seat 43. A self-locking pull pin 46 is provided on the first pull pin mounting block 45. The upper positioning component 3 includes an upper tire fixing seat 48, and the upper tire fixing seat 48 is connected to the T-shaped mounting plate 13 of the pressing mechanism 5. The lower end face of the horizontal plane is screwed and fixed. An upper positioning seat 47 is provided at the lower end of the upper tire fixing seat 48. The upper end stop of the upper positioning seat 47 is engaged with the inner hole of the upper tire fixing seat 48. Second pull pin mounting blocks 49 are symmetrically arranged on both sides of the upper positioning seat 47. The second pull pin mounting blocks 49 are screwed and fixed on both sides of the upper tire fixing seat 48. A self-locking pull pin 46 is provided on the second pull pin mounting block 49. Preferably, the L-shaped support 12 and the T-shaped mounting plate 13 are connected by a linear guide rail assembly 14. The upper slider of the linear guide rail assembly 14 is screwed to the T-shaped mounting plate 13, and the lower guide rail is screwed to the side of the L-shaped support 12. Preferably, the optional models of some structural components in this solution are as follows: locking clamping cylinder: BES50×200; thrust reset cylinder: ACQ40×20S; pull-out cylinder: ACQ20×10S; linear guide rail assembly: HGR35CA1R460ZACⅡ; digital dial indicator: 543-681B; self-locking pull-out pin: ZAU13-M12.

[0016] The following is a further explanation of this solution with reference to specific embodiments.

[0017] Example: The present invention provides a differential half-shaft gear backlash detection device, comprising a worktable 1, a measuring mechanism 4, a clamping mechanism 5, a thrust reset mechanism 6, a spreading mechanism 7, an upper positioning component 2 and a lower positioning component 3 that cooperate with the differential; The workbench 1 includes a bed 8 and a button box 9. The bed 8 is formed by welding steel plates and square tubes and other profiles. The workbench surface of the bed 8 has threaded holes for connecting the clamping mechanism 5. The clamping mechanism 5 includes a base 10, a limiting pad 11, an L-shaped support 12, a T-shaped mounting plate 13, a linear guide rail assembly 14, a first cylinder mounting plate 15, a locking clamping cylinder 16, a cylinder connecting seat 17, and a guide positioning seat 18. The base 10 is formed by welding steel plates, and its lower end is screwed to the working surface of the bed 8 of the worktable 1. The L-shaped support 12 is screwed to the upper end of the base 10. The guide rail of the linear guide rail assembly 14 is screwed to the side of the L-shaped support 12. The vertical surface of the T-shaped mounting plate 13 is screwed to the slider on the linear guide rail assembly 14. The limiting pad 11 is arranged below the vertical surface of the T-shaped mounting plate 13 and screwed to the side of the L-shaped support 12. The limiting pad 11 is used to limit the downward distance of the T-shaped mounting plate 13. The first cylinder mounting plate 15 is screwed and fixed to the upper end face of the L-shaped support 12. The locking clamping cylinder 16 is screwed and fixed to the first cylinder mounting plate 15. The piston rod of the locking clamping cylinder 16 passes through the positioning hole on the first cylinder mounting plate 15. The piston rod of the locking clamping cylinder 16 is connected to the lower cylinder connecting seat 17. The function of the locking clamping cylinder 16 is to prevent the cylinder piston from accidentally causing the equipment to lose control. The cylinder connecting seat 17 is screwed and fixed to the upper end face of the horizontal surface of the T-shaped mounting plate 13. The guide positioning seat 18 is screwed and fixed to the upper end face of the horizontal surface of the T-shaped mounting plate 13. The outer circle of the lower stop of the guide positioning seat 18 is matched with the positioning hole on the horizontal surface of the T-shaped mounting plate 13. The inner hole of the guide positioning seat 18 is matched with the outer diameter of the guide sleeve 19 in the thrust reset mechanism 6. The thrust reset mechanism 6 includes a guide sleeve 19, a double-ear pull plate 20, a second cylinder mounting plate 21, a thrust reset cylinder 22, a push rod support 23, a reset spring 24, a connecting rod 25, a connecting pin 26, and a spline sleeve 27. The guide sleeve 19 passes through the guide positioning seat 18 in the clamping mechanism 5, and the outer diameter of the guide sleeve 19 matches the inner hole of the guide positioning seat 18. The double-ear pull plate 20 is screwed and fixed to the upper end face of the guide sleeve 19, and the open slots on both sides of the double-ear pull plate 20 match the pull rod 38 in the measuring mechanism 4. The second cylinder mounting plate 21 is screwed and fixed to the upper end of the double-ear pull plate 20, and the lower end stop of the second cylinder mounting plate 21 matches the inner hole of the double-ear pull plate 20. The thrust reset cylinder 22 is screwed and fixed to the second cylinder mounting plate 21. The piston rod of the reset cylinder 22 passes through the positioning hole on the second cylinder mounting plate 21. The piston rod of the thrust reset cylinder 22 is connected to the connecting rod 25 at the lower end. The lower part of the connecting rod 25 is connected to the spline sleeve 27 by the connecting pin 26. The connecting pin 26 slides in the keyways on both sides inside the guide sleeve 19 to prevent the spline sleeve 27 from rotating in the guide sleeve 19. The outer diameter of the spline sleeve 27 is axially slidably engaged with the guide sleeve 19. The push rod support 23 is screwed and fixed to the upper end face of the thrust reset cylinder 22. The reset spring 24 is sleeved on the cylindrical rod of the push rod support 23. The lower end of the reset spring 24 is fixed to the push rod support 23, and the upper end is engaged with the lower end face of the C-shaped seat in the measuring mechanism 4. The reset spring 24 is used for the sliding reset of the thrust reset mechanism 6. The expansion mechanism 7 is bolted to the lower part of the thrust reset mechanism. It includes a tensioning sleeve 28, a spindle 29, a sliding sleeve 30, a limiting pin 31, a compression spring 32, a limiting retaining ring 33, a conical sleeve 34, an open retaining ring 35, and a fixing block 36. The upper flange of the tensioning sleeve 28 is screwed to the lower end of the guide sleeve 19 in the thrust reset mechanism 6. The lower end of the tensioning sleeve 28 has several vertical openings spaced circumferentially, with the closed ends of the vertical openings being arc-shaped. The spindle 29 is sleeved inside the tensioning sleeve 28. The splined shaft at the upper end of the spindle 29 mates with the inner spline of the splined sleeve 27 in the thrust reset mechanism 6. The sliding sleeve 30 is axially slidably engaged with the outer diameter of the spindle 29 and the inner diameter of the tensioning sleeve 28, providing stable motion guidance for the spindle 29 and preventing it from shifting or vibrating during movement. The compression spring... A compression spring 32 is fitted onto the lower part of the mandrel 29. The upper end of the compression spring 32 is fixed to the stepped hole end face of the tension sleeve 28, and the lower end cooperates with the upper end face of the limiting ring 33. The compression spring 32 is used for the sliding reset of the mandrel 29. A tapered sleeve 34 is provided at the lower end of the limiting ring 33. The outer tapered surface of the tapered sleeve 34 cooperates with the inner tapered surface at the lower end of the tension sleeve 28. An open ring 35 is provided at the lower end of the tapered sleeve 34. The open ring 35 has a split structure and is locked in the groove at the lower end of the mandrel 29. The open ring 35 plays an axial limiting role for the tapered sleeve 34. The fixing block 36 is provided on the lower end face of the mandrel 29. The fixing block 36 plays a role in fixing and limiting the open ring 35. The limiting pin 31 passes through the slot hole (long strip) on the tension sleeve 28 and the mandrel 29. The limiting pin 31 plays a role in limiting the axial displacement of the mandrel. The measuring mechanism 4 includes a support base 37, a pull rod 38, a pull cylinder 39, a C-shaped base 40, a dial indicator fixing base 41, and a digital dial indicator 42. The upper end of the C-shaped base 40 is provided with a dial indicator fixing base 41, which is used to clamp and fix the digital dial indicator 42. The probe of the digital dial indicator 42 passes through the positioning hole of the C-shaped base 40. The support base 37 is symmetrically arranged at the lower end of the C-shaped base. The pull cylinder 39 passes through the positioning hole on the support base 37. The piston rod of the pull cylinder 39 is connected to the pull rod 38. The pull rod 38 cooperates with the open slots on both sides of the double-ear pull plate 20 in the thrust reset mechanism 6. The lower positioning component 2 includes a lower tire fixing seat 43, a lower positioning seat 44, a first pull pin mounting block 45, and a self-locking pull pin. Pull pin 46, the lower tire fixing seat 43 is screwed to the working surface of the base 10 of the clamping mechanism 5, the lower positioning seat 44 is set on the upper end of the lower tire fixing seat 43, the lower end stop fits with the inner hole of the lower tire fixing seat 43, and the upper end inner hole fits with the shaft diameters at both ends of the differential housing 100. The first pull pin mounting block 45 is symmetrically arranged on both sides of the lower positioning seat 44 and screwed to the upper end of the lower tire fixing seat 43. The self-locking pull pin 46 is screwed to the first pull pin mounting block 45. The pin shaft of the self-locking pull pin 46 fits with the pin holes on both sides of the lower positioning seat 44. The self-locking pull pin 46 can realize the quick replacement of different models of lower positioning seats 44. The upper positioning component 3 includes a self-locking pull pin 46, an upper positioning seat 47, an upper tire fixing seat 48, and a second pull pin. Mounting block 49, the upper tire fixing seat 48 is screwed and fixed to the lower end face of the horizontal plane of the T-shaped mounting plate 13 of the pressing mechanism 5, and is arranged directly below the guide positioning seat 18 in the pressing mechanism 5. The upper end stop of the upper positioning seat 47 is engaged with the inner hole of the upper tire fixing seat 48. The second pull pin mounting block 49 is screwed and fixed on both sides of the upper tire fixing seat 48. The self-locking pull pin 46 is screwed and fixed on the second pull pin mounting block 49. The pin shaft of the self-locking pull pin 46 is engaged with the pin holes on both sides of the upper positioning seat 47. The self-locking pull pin 46 can realize the quick replacement of different models of upper positioning seats 47.

[0018] It should be noted that in this solution, the button box is used to house the operation buttons. The connection between the operation buttons and the control circuit and air circuit is existing technology and will not be described in detail.

[0019] The specific operation process of this utility model structure is as follows: After the operator places the differential on the lower positioning seat 44, they press the start button. The locking clamping cylinder 16 in the clamping mechanism 5 moves downward, driving the upper positioning component 3 to clamp the differential under test. At the same time, it drives the opening mechanism 7 to extend into the inner hole of the differential half-shaft gear 200. When the magnetic switch on the locking clamping cylinder 16 detects the signal that the pressure has reached the target position (the setting and working principle of the magnetic switch are existing technology and will not be described in detail; it can also be operated by manual observation), the thrust reset cylinder 22 in the thrust reset mechanism 6 begins to move downward. The thrust reset cylinder 22 pushes the spindle 29 in the opening mechanism 7 downward. The downward movement of the spindle 29 causes the outer conical surface of the conical sleeve 34 to contact the inner conical surface of the lower end of the tensioning sleeve 28. The tensioning sleeve 28 is deformed and expanded by the vertical opening at the lower end of the tensioning sleeve 28, so that the cylindrical surface of the tensioning sleeve 28 and the inner hole of the half-shaft gear 200 are fitted together and tightened. When the magnetic switch on the thrust reset cylinder 22 detects the signal of the pressure being in place, the extension button of the pull cylinder 39 is pressed, so that its piston rod extends. The expansion mechanism 7 drives the half-shaft gear 200 to move downward. The extension of the pull cylinder 39 makes the upper end face of the push rod support 23 contact the lower side of the digital display dial indicator 42. At this time, the reading on the digital display dial indicator 42 is read and recorded. Then, the retraction button of the pull cylinder 39 is pressed, and the expansion mechanism 7 drives the half-shaft gear 200 to move upward. The reading on the digital display dial indicator 42 is read and recorded again.

[0020] The difference between the two readings of the digital dial indicator 42 is the clearance between the half-shaft gear 200 and the planetary gear 300 that needs to be measured. Then, press the stop button, and the thrust reset cylinder 22 in the thrust reset mechanism 6 begins to move upward. The outer conical surface of the conical sleeve 34 separates from the inner conical surface of the lower end of the tension sleeve 28. The vertical opening at the lower end of the tension sleeve 28 retracts and separates from the cylindrical surface of the inner hole of the half-shaft gear 200. The locking clamping cylinder 16 moves upward, driving the upper positioning component 3 to release the differential under test. Then, the differential is manually flipped, and the clearance of the half-shaft gear on the other end is tested according to the above steps.

Claims

1. A differential half-shaft gear backlash detection device, characterized in that: It includes a worktable, a measuring mechanism, a clamping mechanism, a thrust reset mechanism, a spreading mechanism, and an upper positioning assembly and a lower positioning assembly that cooperate with the differential; The workbench includes a bed, and a button box is fixed on the side of the bed; The clamping mechanism includes a base, which is screwed to the working surface of the workbench. An L-shaped support is provided on the base, and a limit pad is screwed to the side of the L-shaped support. A T-shaped mounting plate is provided above the limit pad. A first cylinder mounting plate is provided on the upper surface of the L-shaped support. A locking clamping cylinder is provided on the first cylinder mounting plate. The locking clamping cylinder passes through a positioning hole on the first cylinder mounting plate. The piston rod of the locking clamping cylinder is connected to the lower cylinder connecting seat. The cylinder connecting seat and the guide positioning seat are located on the upper surface of the horizontal plane of the T-shaped mounting plate. The thrust reset mechanism includes a guide sleeve, inside which is a spline sleeve. The outer diameter of the spline sleeve is axially slidably fitted with the guide sleeve. A connecting rod is provided at the upper end of the spline sleeve, and the connecting rod is connected to the spline sleeve by a connecting pin. The connecting pin slides in keyways on both sides inside the guide sleeve. A double-ear pull plate is provided at the upper end of the guide sleeve, and a second cylinder mounting plate is provided at the upper end of the double-ear pull plate. A thrust reset cylinder is provided on the second cylinder mounting plate, passing through a positioning hole on the second cylinder mounting plate. The piston rod of the thrust reset cylinder is connected to the connecting rod at the lower end. A push rod support is provided at the upper end of the thrust reset cylinder, and a reset spring is sleeved on the cylindrical rod of the push rod support. The expansion mechanism includes a tensioning sleeve, inside which is a mandrel. A sliding sleeve is fitted on the upper outer diameter of the mandrel, and the sliding sleeve is axially slidably engaged with both the outer diameter of the mandrel and the inner diameter of the tensioning sleeve. A compression spring is fitted on the lower part of the mandrel, and a limit ring is provided at the lower end of the compression spring. A tapered sleeve is provided at the lower end of the limit ring, and an open-ended ring is provided at the lower end of the tapered sleeve. The open-ended ring has a split structure and is engaged in a groove at the lower end of the mandrel. A fixing block is provided on the lower end face of the mandrel. A limiting pin passes through a groove hole on the tensioning sleeve and the mandrel. The measuring mechanism includes a digital dial indicator, which is clamped and fixed in a dial indicator mounting base. A C-shaped base is provided at the lower end of the dial indicator mounting base, and support bases are symmetrically arranged on both sides of the C-shaped base. A pull-out cylinder is provided at the upper end of the support base. The pull-out cylinder passes through a positioning hole on the support base, and the piston rod of the pull-out cylinder is connected to a pull rod. The pull rod cooperates with a double-ear pull plate. The lower positioning component includes a lower tire fixing seat, which is screwed to the working surface of the base of the pressing mechanism. A lower positioning seat is provided at the upper end of the lower tire fixing seat. The lower end stop of the lower positioning seat is matched with the inner hole of the lower tire fixing seat. A first pull pin mounting block is symmetrically provided on both sides of the lower positioning seat. The first pull pin mounting block is screwed and fixed to the upper end of the lower tire fixing seat. A self-locking pull pin is provided on the first pull pin mounting block. The upper positioning component includes an upper tire fixing seat, and the lower end of the upper tire fixing seat is parallel to the horizontal plane of the T-shaped mounting plate of the pressing mechanism. The upper tire fixing seat is fixed by screw thread. An upper positioning seat is provided at the lower end of the upper tire fixing seat. The upper end stop of the upper positioning seat is matched with the inner hole of the upper tire fixing seat. Second pull pin mounting blocks are symmetrically arranged on both sides of the upper positioning seat. The second pull pin mounting blocks are screwed and fixed on both sides of the upper tire fixing seat. A self-locking pull pin is provided on the second pull pin mounting block.

2. The differential half-shaft gear backlash detection device according to claim 1, characterized in that: The L-shaped support and the T-shaped mounting plate are connected by a linear guide rail assembly. The upper slider of the linear guide rail assembly is screwed to the T-shaped mounting plate, and the lower guide rail is screwed to the side of the L-shaped support.

3. The differential half-shaft gear backlash detection device according to claim 1, characterized in that: The locking clamping cylinder is model BES50×200.

4. The differential half-shaft gear backlash detection device according to claim 1, characterized in that: The thrust reset cylinder is model ACQ40×20S.

5. The differential half-shaft gear backlash detection device according to claim 1, characterized in that: The drawing cylinder model is ACQ20×10S.

Images