Run-out detection equipment for power-assisted gear shaft of automobile steering device

Abstract

The utility model provides run-out detection equipment for a power-assisted gear shaft of an automobile steering device, and the equipment mainly comprises a clamping member which comprises a substrate, and a first clamping member and a second clamping member which are oppositely disposed on the substrate along a first direction, and are respectively used for clamping two ends of a power-assisted gear; the gear ring detection component is arranged on the horizontal side of the second direction of the clamping component and comprises a gear jump detection part and a displacement driving module for driving the gear jump detection part to horizontally move in the second direction, and the gear jump detection part is provided with a detection gear meshed with a gear ring of the power-assisted gear shaft and a rotation driving piece for driving the detection gear to rotate; the second direction is perpendicular to the first direction; and the shaft end detection component comprises two groups of shaft end detection parts which are arranged at intervals along the first direction and are respectively used for detecting the circle run-out of the two shaft ends of the power-assisted gear shaft. Through the above mode, the tooth run-out of the gear part of the power-assisted gear shaft and the circle run-out of the two shaft ends can be detected at the same time, and the detection precision and efficiency are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of gear shaft detection technology, and in particular to a device for detecting the runout of the power steering gear shaft in an automobile. Background Technology

[0002] The power steering gear shaft is a core component of the electric power steering (EPS) system, and its specific structure is as follows: Figure 1 As shown, the power assist gear shaft 4 includes a shaft body 41 and a gear portion 42 formed on the shaft body 41. The shaft body 41 includes a first shaft end and a second shaft end disposed opposite to each other, wherein one shaft end is hollow along the axial direction to form a hollow channel 43.

[0003] Power steering shafts used in the market require a high degree of precision in the surface flatness of the shaft and the uniformity of the gear ring to ensure safe use. Currently, existing technologies typically involve manual inspection using measuring instruments, which is inefficient and inaccurate. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes a simple, highly applicable, and efficient device for detecting the runout of the power steering gear shaft in automobiles.

[0005] The main contents of this utility model include: a clamping member, which includes a base plate, a first clamping member and a second clamping member disposed opposite to each other on the base plate along a first direction, the first clamping member including a first chuck and a first transverse drive member for driving the first chuck to move horizontally along the first direction, the second clamping member including a second chuck and a second transverse drive member for driving the second chuck to move horizontally along the first direction, the first chuck and the second chuck are coaxially arranged and are respectively used to clamp the two ends of the power assist gear;

[0006] A gear ring detection component is disposed on the horizontal side of the clamping component in the second direction. It includes a gear skip detection part and a displacement drive module for driving the gear skip detection part to move horizontally in the second direction. The gear skip detection part is provided with a detection gear that meshes with the gear ring of the booster gear shaft and a rotary drive component for driving the detection gear to rotate. The second direction is perpendicular to the first direction.

[0007] The shaft end detection component includes two sets of shaft end detection parts spaced apart along a first direction. Each shaft end detection part includes a bracket and a second displacement sensor mounted on the bracket. The second displacement sensor is located on the horizontal side of the second direction at the end of the power assist gear shaft and is used to detect the circular runout of the two ends of the power assist gear shaft.

[0008] Preferably, the tooth skip detection unit includes a mounting plate, on which a floating slide rail extending in a second direction is provided. A support plate is slidably disposed on the floating slide rail. The detection gear is rotatably disposed on the side of the support plate near the clamping member. A fixed plate is disposed on the side of the support plate away from the clamping member. A return spring is disposed between the support plate and the fixed plate. A first displacement sensor is disposed on the side of the support plate away from the clamping member for detecting the amount of movement of the support plate.

[0009] Preferably, a guide rod is horizontally inserted between the support plate and the fixing plate, and the return spring is sleeved on the circumference of the guide rod, with one end of the return spring abutting the support plate and the other end abutting the fixing plate.

[0010] Preferably, the rotary drive includes a servo motor, which is connected to a drive gear via a reducer, and the drive gear meshes with the detection gear for transmission.

[0011] Preferably, the ends of the first and second clamps are tapered.

[0012] Preferably, the first chuck is configured as a spindle structure that can be inserted into the hollow channel of the power assist gear shaft.

[0013] Preferably, the clamping member further includes a first slide rail extending along a first direction, and both the first clamp and the second clamp are slidably disposed on the first slide rail.

[0014] Preferably, the two sets of shaft end detection parts are respectively connected to a third transverse drive, and the third transverse drive drives the shaft end detection parts to reciprocate along the first direction.

[0015] Preferably, the shaft end detection component further includes a second slide rail extending along the first direction, and both sets of shaft end detection parts are slidably disposed on the second slide rail.

[0016] The beneficial effects of this utility model are as follows: By setting a clamping component with a bidirectional chuck to clamp the gear shaft, and cooperating with a transversely feedable gear ring detection component, the gear ring runout of the gear shaft can be detected. The shaft end detection component detects the end circular runout of the gear shaft through two sets of spaced shaft end detection parts. During the gear ring runout detection process, the detection gear drives the auxiliary gear shaft to rotate, and the circular runout of its shaft end can be detected simultaneously, effectively improving the detection accuracy and efficiency. The clamping component uses a bidirectional chuck in conjunction with two sets of movable shaft end detection parts to adapt to the detection of auxiliary gear shafts of different models and lengths, making it highly applicable and adaptable. Attached Figure Description

[0017] Figure 1 A three-dimensional structural diagram of the power-assisted gear shaft;

[0018] Figure 2 This is a three-dimensional structural schematic diagram of a preferred embodiment;

[0019] Figure 3 This is a three-dimensional structural diagram of the clamping member in a preferred embodiment;

[0020] Figure 4 This is a three-dimensional structural schematic diagram of the gear ring detection component in a preferred embodiment;

[0021] Figure 5 This is a three-dimensional structural schematic diagram of the shaft end detection component in a preferred embodiment;

[0022] Figure label:

[0023] 1. Clamping member; 11. Base plate; 12. First clamping member; 121. First chuck; 122. First transverse drive member; 13. Second clamping member; 131. Second chuck; 132. Second transverse drive member; 14. First slide rail;

[0024] 2. Gear ring detection component; 21. Gear runout detection unit; 211. Mounting plate; 212. Floating slide rail; 213. Support plate; 214. First displacement sensor; 215. Detection gear; 216. Rotary drive component; 2161. Drive gear; 2162. Servo motor; 217. Fixing plate; 218. Guide rod; 219. Return spring; 22. Displacement drive module;

[0025] 3. Shaft end detection component; 31. Shaft end detection unit; 311. Bracket; 312. Second displacement sensor; 32. Third transverse drive component; 33. Second slide rail;

[0026] 4. Power steering gear shaft; 41. Shaft body; 42. Gear section; 43. Hollow channel. Detailed Implementation

[0027] The technical solution protected by this utility model will be described in detail below with reference to the accompanying drawings.

[0028] like Figure 1-2 As shown, this application proposes a circular runout detection device for the power steering gear shaft of an automobile, which includes a clamping member 1, a gear ring detection member 2 and a shaft end detection member 3 disposed on one side of the clamping member 1. The clamping member 1 is used to clamp both ends of the power steering gear shaft 4, the gear ring detection member 2 is used to detect the runout error of the gear part 42 of the power steering gear shaft 4, and the shaft end detection member 3 is used to detect the runout error of the two shaft ends of the power steering gear shaft 4.

[0029] like Figure 1-3As shown, the clamping member 1 includes a base plate 11. A first clamping member 12 and a second clamping member 13 are disposed opposite each other on the surface of the base plate 11 along a first direction. The first clamping member 12 includes a first chuck 121 and a first transverse drive member 122 that drives the first chuck 121 to move horizontally along the first direction. The second clamping member 13 includes a second chuck 131 and a second transverse drive member 132 that drives the second chuck 131 to move horizontally along a second direction. The axes of the first chuck 121 and the second chuck 131 are coaxially arranged and respectively clamp the two ends of the power assist gear shaft.

[0030] like Figure 1-3 As shown, the clamping ends of the first chuck 121 and the second chuck 131 are tapered to effectively prevent clamping deformation. The first chuck 121 is configured as a mandrel structure that can be inserted into the hollow channel 43 of the power assist gear shaft, and the diameter of the first chuck 121 is smaller than the inner diameter of the hollow channel 43 of the power assist gear shaft 4. During clamping, the first chuck 121 is inserted into the hollow channel 43 of the gear shaft, and the second chuck 131 abuts against the end of the gear shaft to improve the stability of the power assist gear shaft 4 during clamping and ensure that the clamped gear shaft can rotate relative to the chuck.

[0031] like Figure 3 As shown, in a preferred embodiment, the clamping member 1 further includes a first slide rail 14 extending along a first direction on the substrate 11. The first clamp 121 and the second clamp 131 are both slidably disposed on the first slide rail 14 via a slider, so as to improve the stability and directional consistency of the movement process of the first clamp 121 and the second clamp 131.

[0032] like Figure 1-4 As shown, the gear ring detection component 2 is disposed on the horizontal side of the clamping component 1 in the second direction, which is perpendicular to the first direction. The gear ring detection component 2 includes a tooth runout detection part 21 and a displacement drive module 22 that drives the tooth runout detection part 21 to move horizontally in the second direction. The tooth runout detection part 21 is provided with a detection gear 215 that meshes with the gear part 42 of the assist gear shaft and a rotary drive member 216 that drives the detection gear 215 to rotate. The rotary drive member 216 drives the detection gear 215 to rotate, thereby driving the assist gear shaft 4, which is in a meshing state with the detection gear 215, to rotate synchronously. During the rotation of the assist gear shaft 4, tooth runout of its gear part 42 is detected.

[0033] like Figure 4As shown, the tooth skip detection unit 21 includes a mounting plate 211, on which a floating slide rail 212 extending in a second direction is provided. A support plate 213 is slidably mounted on the floating slide rail 212. A detection gear 215 is rotatably mounted on the side of the support plate 213 near the clamping member 1. A fixing plate 217 is provided on the side of the support plate 213 away from the clamping member 1. A return spring 219 is provided between the support plate 213 and the fixing plate 217 to maintain a constant meshing force between the detection gear 215 and the gear part 42 of the assist gear shaft. During the tooth skip detection process of the detection gear 215, the support plate 213 slides back and forth on the floating slide rail 212, and the return spring 219 provides a return force for the support plate. A first displacement sensor 214 is provided on the side of the support plate 213 away from the clamping member 1, and the first displacement sensor 214 is used to detect the amount of movement of the support plate 213.

[0034] Furthermore, a guide rod 218 is horizontally inserted between the support plate 213 and the fixing plate 217, and a return spring 219 is sleeved on the circumference of the guide rod 218. One end of the return spring 219 abuts against the support plate 213, and the other end abuts against the fixing plate 217.

[0035] like Figure 4 As shown, in an exemplary embodiment, the rotary drive 216 includes a servo motor 2162, which is connected to a drive gear 2161 via a reducer. The drive gear 2161 meshes with the detection gear 215. The servo motor 2162 drives the drive gear 2161 to rotate, and the drive gear 2161 drives the detection gear 215 to rotate, which can effectively reduce the motor load.

[0036] like Figure 1-5 As shown, the shaft end detection component 3 is disposed on the horizontal side of the clamping component 1 in the second direction. It includes two sets of shaft end detection parts 31 disposed at intervals along the first direction, which are used to detect the circular runout of the outer surface of the two shaft ends of the power assist gear shaft.

[0037] like Figure 1-5 As shown, the shaft end detection unit 31 includes a second displacement sensor 312 and a bracket 311 on which the second displacement sensor 312 is mounted. The second displacement sensor 312 is mounted on the radial (second direction) side of the clamped power gear shaft through the bracket 311. The sensing end of the second displacement sensor 312 faces the shaft end of the gear shaft. During the rotation of the gear shaft, the second displacement sensor 312 senses the runout error of the corresponding shaft end.

[0038] like Figure 5 As shown, further, each of the two sets of shaft end detection units 31 is connected to a third transverse drive unit 32 that drives it to reciprocate along the first direction. This is used to adjust the detection position of the shaft end detection unit 31. The interval between the two sets of shaft end detection units 31 can be adaptively changed according to different models of power steering shafts, thereby improving the applicability of the detection equipment.

[0039] Preferably, both sets of shaft end detection units 31 are slidably disposed on the second slide rail 33, which extends along the first direction to improve the lateral stability of the two sets of shaft end detection units 31.

[0040] like Figure 2 As shown, in a preferred embodiment, the clamping member 1 and the shaft end detection member 3 are staggered along the height direction. The base plate 11 of the clamping member 1 is mounted on top of the shaft end detection member 3 by a support column, which can effectively reduce the area occupied by the detection equipment and improve the space utilization rate.

[0041] In this embodiment, the first transverse drive 122, the second transverse drive 132, and the third transverse drive 32 are driven by servo motors to move the lead screw, thereby improving the movement accuracy of the corresponding chuck. Alternatively, cylinder drives can be used, but no specific limitation is made here.

[0042] Working principle:

[0043] Clamping process: The power assist gear shaft 4 is placed between the first chuck 121 and the second chuck 131. The first lateral drive 122 pushes the first chuck 121 into the hollow channel 43 at the shaft end. The second lateral drive 132 drives the second chuck 131 to abut against and clamp the other end of the gear shaft in the axial direction, so as to achieve positioning without deformation.

[0044] Gear ring runout detection: The displacement drive module 22 pushes the gear runout detection unit 21 to move along the second direction, so that the detection gear 215 meshes with the gear part of the gear shaft; the rotation drive unit 216 drives the detection gear 215 to rotate one revolution, and the first displacement sensor 214 calculates the gear ring runout error through the floating displacement of the support plate 213.

[0045] Shaft end radial runout detection: During the rotation of the gear shaft driven by the rotary drive 216, the third transverse drive 32 drives the second displacement sensor 312 to move to the shaft end side of the gear shaft to collect radial runout data of the shaft end.

[0046] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A device for detecting the runout of the power steering gear shaft in an automobile, characterized in that, Mainly includes: The clamping member (1) includes a base plate (11), a first clamping member (12) and a second clamping member (13) disposed opposite to each other on the base plate (11) along a first direction. The first clamping member (12) includes a first chuck (121) and a first transverse drive member (122) that drives the first chuck (121) to move horizontally along the first direction. The second clamping member (13) includes a second chuck (131) and a second transverse drive member (132) that drives the second chuck (131) to move horizontally along the first direction. The first chuck (121) and the second chuck (131) are coaxially arranged and are respectively used to clamp the two ends of the power assist gear shaft. The gear ring detection component (2) is disposed on the horizontal side of the clamping component (1) in the second direction, including a tooth jump detection part (21) and a displacement drive module (22) for driving the tooth jump detection part (21) to move horizontally in the second direction. The tooth jump detection part (21) is provided with a detection gear (215) that meshes with the gear ring of the booster gear shaft and a rotary drive component (216) for driving the detection gear (215) to rotate. The second direction is perpendicular to the first direction. The shaft end detection component (3) includes two sets of shaft end detection parts (31) spaced apart along the first direction. The shaft end detection part (31) includes a bracket (311) and a second displacement sensor (312) disposed on the bracket (311). The second displacement sensor (312) is located on the horizontal side of the second direction of the booster gear shaft end and is used to detect the circular runout of the two shaft ends of the booster gear shaft.

2. The device for detecting the runout of the power steering gear shaft in an automobile as described in claim 1, characterized in that, The tooth skip detection unit (21) includes a mounting plate (211), on which a floating slide rail (212) extending in a second direction is provided. A support plate (213) is slidably arranged on the floating slide rail (212). The detection gear (215) is rotatably arranged on the side of the support plate (213) near the clamping member (1). A fixing plate (217) is provided on the side of the support plate (213) away from the clamping member (1). A return spring (219) is provided between the support plate (213) and the fixing plate (217). A first displacement sensor (214) is provided on the side of the support plate (213) away from the clamping member (1) for detecting the amount of movement of the support plate (213).

3. The device for detecting the runout of the power steering gear shaft in an automobile as described in claim 2, characterized in that, A guide rod (218) is horizontally inserted between the support plate (213) and the fixing plate (217). A reset spring (219) is sleeved on the circumference of the guide rod (218). One end of the reset spring (219) abuts against the support plate (213), and the other end abuts against the fixing plate (217).

4. The runout detection device for the power steering gear shaft of an automobile as described in claim 1, characterized in that, The rotary drive (216) includes a servo motor (2162), which is connected to a drive gear (2161) via a reducer. The drive gear (2161) meshes with the detection gear (215).

5. The runout detection device for the power steering gear shaft of an automobile as described in claim 1, characterized in that, The ends of the first clamp (121) and the second clamp (131) are tapered.

6. The runout detection device for the power steering gear shaft of an automobile as described in claim 1, characterized in that, The first chuck (121) is configured as a spindle structure that can be inserted into the hollow channel of the booster gear shaft.

7. The runout detection device for the power steering gear shaft of an automobile as described in claim 1, characterized in that, The clamping member (1) further includes a first slide rail (14) extending along a first direction, and the first clamp (121) and the second clamp (131) are both slidably disposed on the first slide rail (14).

8. The device for detecting the runout of the power steering gear shaft in an automobile as described in claim 1, characterized in that, The two sets of shaft end detection units (31) are respectively connected to the third transverse drive unit (32), and the third transverse drive unit (32) drives the shaft end detection unit (31) to reciprocate along the first direction.

9. The device for detecting the runout of the power steering gear shaft in an automobile as described in claim 8, characterized in that, The shaft end detection component (3) further includes a second slide rail (33) extending along the first direction, and both sets of shaft end detection parts (31) are slidably disposed on the second slide rail (33).

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