End cover run-out detection equipment

Abstract

An end cover run-out detection device disclosed by the present invention comprises a rotary bearing assembly and a magnetic dial indicator, the rotary bearing assembly comprises a pneumatic chuck, a mandrel and a driving member, a plurality of clamping jaw members are uniformly distributed at the output end of the top of the pneumatic chuck along the radial direction, and the bottom of the pneumatic chuck is fixedly connected with a rotary seat coaxially arranged with the mandrel. And the rotating seat is sleeved on the surface of the core shaft through a deep groove ball bearing. The design of synchronous expansion of the pneumatic chuck and the multiple clamping jaws is adopted, the multiple clamping jaw pieces are controlled to stretch out and draw back in the radial direction at the same time, uniform surrounding type expansion is formed on an end cover bearing chamber, local gaps caused by single-point clamping of traditional manual clamping jaws are avoided, the coaxiality of a to-be-detected end cover, the pneumatic chuck and the mandrel is ensured under the cooperation of the rotating base, and the detection accuracy is improved. Therefore, the clamping gap and the radial play error are thoroughly eliminated, and the measurement precision is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of end cap runout detection equipment, and particularly relates to end cap runout detection equipment. Background Technology

[0002] As a key component of mechanical equipment, the runout of the flange face and the radial runout of the bearing housing stop of the end cap directly affect the assembly clearance and the operational stability of the equipment, and therefore require testing using specialized equipment. Currently, in the metal processing industry, the flange plane runout and the cylindrical runout of the stop of the end cap are measured by fitting a mandrel stop with the bearing housing of the end cap, and then using a magnetic percentage measuring instrument to measure the runout values ​​of the end cap plane and the stop.

[0003] Because the mandrel stop needs to be inserted into the bearing chamber of the end cover, and the end cover needs to be able to rotate on the mandrel, the mandrel stop and the bearing chamber must be in clearance fit. This will cause the measured runout value error to increase, making it impossible to measure accurately. Summary of the Invention

[0004] This invention addresses the problem in existing technologies where a clearance fit between the mandrel stop and the bearing housing bore leads to increased errors in measured runout values. The following technical solution is proposed: An end cap runout detection device includes: a rotary bearing assembly and a magnetic dial indicator. The rotary bearing assembly includes a pneumatic chuck, a spindle, and a drive component. The pneumatic chuck has multiple claws evenly distributed radially at its top output end. A rotating seat coaxially arranged with the spindle is fixedly connected to the bottom of the pneumatic chuck. The rotating seat is sleeved on the surface of the spindle through a deep groove ball bearing. The drive unit drives the pneumatic chuck so that multiple jaws simultaneously tighten the bearing chamber of the end cover to be measured, thereby completely eliminating clamping gaps. The rotating seat rotates coaxially with the mandrel to significantly reduce radial runout error and ensure the measurement accuracy of flange end face runout and stop radial runout.

[0005] As a preferred embodiment of the above technical solution, the driving component includes a hand lever valve and a rotary joint. The rotary joint is located inside the spindle. The fixed part of the rotary joint is connected to the hand lever valve through an air pipe, and the rotating part of the rotary joint is connected to the pneumatic chuck through an air pipe. The air pipe is switched through the rotary joint to avoid the air pipe getting tangled when the rotating seat drives the pneumatic chuck to rotate.

[0006] As a preferred embodiment of the above technical solution, the claw component includes an arc-shaped base, on which multiple arc-shaped claw blocks are stacked and fixedly disposed. The radii of the multiple arc-shaped claw blocks decrease sequentially in the direction away from the arc-shaped base, and the different arc-shaped claw blocks are adapted to the bearing chamber of the corresponding end cap to be tested.

[0007] As a preferred embodiment of the above technical solution, the surface of the arc-shaped claw block is provided with a wear-resistant coating, and the thickness of the wear-resistant coating of the arc-shaped claw block is 0.05-0.1mm, so as to avoid clamping gap caused by wear of the stop.

[0008] As a preferred embodiment of the above technical solution, the claw component includes a base and a claw block. A lead screw is rotatably inserted into the base, and a slider that is fixedly connected to the claw block is threaded onto the surface of the lead screw. The surface of the base has an insertion groove that matches the slider. Both ends of the lead screw extend through the base to the outside, and a knob and a bevel gear are respectively provided at both ends of the lead screw. Adjacent bevel gears mesh with each other. The knob drives the lead screw to rotate, and the bevel gear drives multiple lead screws to rotate synchronously to adjust multiple sliders synchronously. The slider position change is adapted to the bearing chamber of the corresponding end cap to be tested.

[0009] As a preferred embodiment of the above technical solution, the lead screw is a trapezoidal lead screw, and the slider is matched with it.

[0010] As a preferred embodiment of the above technical solution, a rubber layer is provided in the middle of the claw block, and the thickness of the rubber layer of the claw block gradually decreases from the middle to both sides, so as to increase the contact area with the bearing chamber of the end cap to be tested by deformation and avoid the generation of clamping gap.

[0011] As a preferred embodiment of the above technical solution, the rotating bearing assembly further includes a base plate and a protective cover. The base plate is fixedly connected to the spindle, the protective cover is sleeved on the outside of the spindle and the rotating seat, and the magnetic dial indicator is mounted on the protective cover.

[0012] The beneficial effects of this invention are as follows: 1. The design adopts a pneumatic chuck and multi-jaw synchronous expansion, which controls the simultaneous radial expansion and contraction of multiple jaw components to form a uniform circumferential expansion on the end cover bearing chamber. This avoids the local gaps caused by the single-point clamping of traditional manual jaws. With the cooperation of the rotating seat, the coaxiality of the end cover under test, the pneumatic chuck, and the mandrel is ensured, thereby completely eliminating clamping gaps and radial movement errors and improving measurement accuracy. 2. The chuck adopts the structure of "arc base + stacked arc claw blocks". Multiple arc claw blocks are stacked along the height of the base, and the diameter decreases in sequence away from the base. When testing end caps of different specifications, it is only necessary to fit the bearing chamber of the end cap to be tested into the stop block of the corresponding diameter. The single chuck is adapted to multiple specifications of end caps to be tested, thereby greatly reducing the changeover time. 3. The jaw components adopt a synchronous drive structure of "bevel gear + trapezoidal lead screw + slider". When the knob is turned, the lead screw of each jaw component rotates synchronously through the meshing bevel gear. The slider moves along the lead screw axis, realizing the "same speed, same direction, same stroke" adjustment of multiple jaws. This ensures the coaxiality of the jaw blocks after adjustment. Based on this, it can be adapted to the detection of end caps of different specifications without increasing the depth of the jaw components. Attached Figure Description

[0013] Figure 1 The diagram shown is a schematic representation of the overall structure of the embodiment; Figure 2 The diagram shown is of the retracted state of the chuck component in Embodiment 1; Figure 3 The diagram shown is of the tightened state of the chuck component in Embodiment 1; Figure 4 The diagram shown is of the retracted state of the chuck component in Embodiment 2; Figure 5 The diagram shown is a diagram of the tightened state of the chuck component in Embodiment 2.

[0014] In the diagram: 10. Pneumatic chuck; 20. Spindle; 30. Claw assembly; 311. Arc-shaped base; 312. Arc-shaped claw block; 321. Base seat; 322. Claw block; 323. Lead screw; 324. Slider; 325. Knob; 326. Bevel gear; 40. Rotary seat; 51. Hand valve; 52. Rotary joint; 53. Air pipe; 60. Base plate; 70. Protective cover; 80. End cap to be tested; 90. Magnetic dial indicator. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings.

[0016] Example 1 Figures 1-3 The end cap runout detection device includes: a rotating bearing assembly and a magnetic dial indicator 90. The rotating bearing assembly includes a pneumatic chuck 10, a spindle 20 and a drive component. The pneumatic chuck 10 has multiple claws 30 evenly distributed radially at its top output end. The bottom of the pneumatic chuck 10 is fixedly connected to a rotating seat 40 coaxially arranged with the spindle 20. The rotating seat 40 is sleeved on the surface of the spindle 20 by a deep groove ball bearing. The drive unit drives the pneumatic chuck 10 so that multiple jaw pieces 30 simultaneously tighten the bearing chamber of the end cover 80 to be measured, thereby completely eliminating the clamping gap. The rotating seat 40 and the spindle 20 rotate coaxially to greatly reduce the radial runout error and ensure the measurement accuracy of the flange end face runout and the radial runout of the stop.

[0017] The rotating bearing assembly also includes a base plate 60 and a protective cover 70. The base plate 60 is fixedly connected to the spindle 20. The protective cover 70 is sleeved on the outside of the spindle 20 and the rotating seat 40. The magnetic dial indicator 90 is installed on the protective cover 70. The protective cover 70, which is sleeved on the outside of the spindle 20 and the rotating seat 40, prevents metal debris, oil stains and other impurities in the workshop from entering the deep groove ball bearing between the spindle 20 and the rotating seat 40, thus ensuring the coaxiality of the rotating seat 40 when it rotates around the spindle 20.

[0018] The driving component includes a hand lever valve 51 and a rotary joint 52. The rotary joint 52 is located inside the spindle 20. The fixed part of the rotary joint 52 is connected to the hand lever valve 51 through an air pipe 53. The rotating part of the rotary joint 52 is connected to the pneumatic chuck 10 through an air pipe 53. The air pipe 53 is switched through the rotary joint 52 to avoid the air pipe 53 getting tangled when the rotating seat 40 drives the pneumatic chuck 10 to rotate.

[0019] The design employs a pneumatic chuck 10 and a multi-jaw synchronous expansion mechanism, controlling the simultaneous radial expansion and contraction of multiple jaw components 30 to form a uniform, circumferential expansion of the end cover bearing chamber. This avoids the localized gaps caused by single-point clamping of traditional manual jaws. With the cooperation of the rotating seat 40, the coaxiality of the end cover 80 under test with the pneumatic chuck 10 and the spindle 20 is ensured, thereby completely eliminating clamping gaps and radial movement errors and improving measurement accuracy.

[0020] The claw component 30 includes an arc-shaped base 311, on which a plurality of arc-shaped claw blocks 312 are stacked and fixedly disposed. The radii of the plurality of arc-shaped claw blocks 312 decrease sequentially in the direction away from the arc-shaped base 311, and the different arc-shaped claw blocks 312 are adapted to the bearing chamber of the corresponding end cover 80 to be tested by utilizing the variation of the radius of the arc-shaped claw blocks 312.

[0021] The surface of the arc-shaped claw block 312 is provided with a wear-resistant coating, the thickness of which is 0.05-0.1mm, to avoid clamping gap caused by wear of the stop.

[0022] Match the bearing chamber specifications of the end cap to be tested with the inner diameter of the stacked arc-shaped claw blocks 312 on the pneumatic chuck 10 jaws 30. After determining the suitable arc-shaped claw blocks 312, align the bearing chamber of the end cap to be tested and fit it into the suitable arc-shaped claw blocks 312. Turn the lever valve 51 to the air intake position. Compressed air enters the pneumatic chuck 10 through the lever valve 51, the fixing part of the rotary joint 52, and the rotating part of the rotary joint 52 in sequence. After the pneumatic chuck 10 is inflated, it drives the jaws 30 to extend radially synchronously, so that the arc-shaped claw blocks 312 fit tightly against the inner wall of the bearing chamber of the end cap. The 0.05-0.1mm thick chrome-plated or titanium nitride wear-resistant coating on the surface of the arc-shaped claw blocks 312 avoids clamping gaps caused by stop wear, completely eliminating the gap between the end cap and the jaws 30. At this time, the protective cover 70 is installed. The magnetic dial indicator 90 is adjusted so that the probes abut against the flange face of the end cap and the bearing chamber stop respectively. The rotating seat 40 is driven to rotate coaxially around the spindle 20 manually or by the drive device. During the rotation, the built-in rotary joint 52 rotates synchronously with the rotating seat 40 to avoid the air tube 53 from getting tangled. The magnetic dial indicator 90 collects the end face runout data of the end cap flange face and the radial runout data of the bearing chamber stop in real time. After rotating 1-2 revolutions, the difference between the maximum and minimum values ​​displayed by the dial indicator is recorded, which is the runout amount corresponding to the end cap. After the test is completed, the hand valve 51 is turned to the exhaust position, the pneumatic chuck 10 exhausts, and the chuck 30 retracts radially. The tested end cap is then removed. If other specifications of end caps need to be tested, the above process can be repeated by selecting the arc-shaped claw block 312 with the corresponding inner diameter on the chuck 30.

[0023] The chuck component 30 adopts an "arc base 311 + stacked arc claw block 312" structure. Multiple arc claw blocks 312 are stacked along the height direction of the base, and the diameter decreases sequentially in the direction away from the base. When testing end caps 80 of different specifications, it is only necessary to fit the bearing chamber of the end cap 80 to be tested into the stop block of the corresponding diameter. The single chuck component can adapt to multiple specifications of end caps 80 to be tested, thereby greatly reducing the changeover time.

[0024] Example 2 Figures 4-5 In this structure, the claw component 30 includes a base 321 and a claw block 322. A lead screw 323 is rotatably inserted into the base 321. A slider 324, which is fixedly connected to the claw block 322, is threaded onto the surface of the lead screw 323. The base 321 has an insertion groove that matches the slider 324. Both ends of the lead screw 323 extend through the base 321 to the outside. A knob 325 and a bevel gear 326 are respectively provided at both ends of the lead screw 323. Two adjacent bevel gears 326 mesh with each other. The knob 325 drives the lead screw 323 to rotate. The bevel gears 326 drive multiple lead screws 323 to rotate synchronously to adjust multiple sliders 324 synchronously. The position change of the slider 324 is adapted to the bearing chamber of the corresponding end cover 80 to be tested.

[0025] The lead screw 323 is a trapezoidal lead screw 323, and the slider 324 is matched with it.

[0026] A rubber layer is provided in the middle of the claw block 322. The thickness of the rubber layer of the claw block 322 gradually decreases from the middle to both sides, so as to increase the contact area with the bearing chamber of the end cover 80 to be tested by deformation and avoid the generation of clamping gap.

[0027] Before testing the end caps 80 of different diameters, rotate the knob 325, which is fixedly connected to the driving bevel gear 326. The driving bevel gear 326 meshes with the driven bevel gears 326 fixed at one end of all the trapezoidal lead screws 323, causing all the trapezoidal lead screws 323 to rotate synchronously inside the rotating seat 40. The sliders 324, which are threaded onto the surface of the trapezoidal lead screws 323, slide synchronously radially along the insertion grooves opened on the surface of the rotating seat 40. The pawls 30, which are fixedly connected to the sliders 324, move together with the sliders 324 until they reach the appropriate position. Once the position is reached, the adjustment can be stopped. The claw block 322 of the claw component 30 has a rubber layer of nitrile rubber or silicone rubber on the side away from the base 321, with the thickness gradually decreasing from the middle to both sides. The rubber layer of the claw block 322 contacts the outer wall of the end cover bearing chamber and deforms. The deformation fills the microscopic defects on the surface of the end cover bearing chamber, eliminates the clamping gap, and increases the contact area with the end cover bearing chamber. This avoids hard contact causing deformation or damage to the thin-walled or soft end cover. Then, the same method as in Example 1 can be used for testing.

[0028] The jaw component 30 adopts a synchronous drive structure of "bevel gear 326 + trapezoidal lead screw 323 + slider 324". When the knob 325 rotates a single lead screw 323, the meshing bevel gear 326 drives the lead screws 323 of all jaw components 30 to rotate synchronously. The slider 324 moves along the axial direction of the lead screw 323, realizing the adjustment of multiple jaws with "same speed, same direction, and same stroke", ensuring the coaxiality of the jaw block 322 after adjustment. On this basis, it can be adapted to the detection of end caps 80 of different specifications without increasing the depth of the jaw component 30.

[0029] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. An end cap runout detection apparatus, characterized by, Include: Rotary bearing assembly and magnetic force dial gauge (90), the rotary bearing assembly includes pneumatic chuck (10), mandrel (20) and driving piece, the top output end of pneumatic chuck (10) is uniformly distributed with multiple jaw pieces (30) along the radial direction, the bottom of pneumatic chuck (10) is fixedly connected with the rotary seat (40) coaxially arranged with mandrel (20), the rotary seat (40) is sleeved on the surface of mandrel (20) through deep groove ball bearing; The driving piece drives the pneumatic chuck (10) so that multiple jaw pieces (30) simultaneously expand the bearing chamber of the end cover (80) to be measured, so as to completely eliminate the clamping gap, the rotary seat (40) is coaxially rotated with the mandrel (20), so as to greatly reduce the radial runout error, and ensure the measurement accuracy of the flange face end face runout and the stopper radial runout.

2. The end cap runout detection apparatus of claim 1, wherein The driving piece includes hand plate valve (51) and rotary joint (52), the rotary joint (52) is located inside the mandrel (20), the fixed part of the rotary joint (52) is connected with the hand plate valve (51) through the air pipe (53), the rotary part of the rotary joint (52) is connected with the pneumatic chuck (10) through the air pipe (53), and the air pipe (53) is connected through the rotary joint (52) to avoid winding of the air pipe (53) when the rotary seat (40) drives the pneumatic chuck (10) to rotate.

3. The end cap runout detection apparatus of claim 1, wherein The jaw piece (30) includes an arc base (311), and multiple arc claw blocks (312) are fixedly arranged on the top of the arc base (311) in a stacking manner, the radii of the multiple arc claw blocks (312) gradually decrease away from the arc base (311), and the arc claw blocks (312) with different radii are matched with the bearing chambers of the end covers (80) to be measured.

4. The end cap runout detection apparatus of claim 3, wherein The surface of the arc claw block (312) is provided with a wear-resistant coating, and the thickness of the wear-resistant coating of the arc claw block (312) is 0.05-0.1mm, so as to avoid the clamping gap caused by the wear of the stopper.

5. The end cap runout detection apparatus of claim 1, wherein The jaw piece (30) includes a base seat (321) and a jaw block (322), a lead screw (323) is rotatably inserted into the base seat (321), the surface of the lead screw (323) is threadedly sleeved with a sliding block (324) fixedly connected with the jaw block (322), the surface of the base seat (321) is provided with a plug-in groove matched with the sliding block (324), and the two ends of the lead screw (323) extend to the outside and are respectively provided with a knob (325) and a bevel gear (326), the adjacent two bevel gears (326) are meshed with each other, the knob (325) drives the lead screw (323) to rotate, a plurality of lead screws (323) are driven to rotate synchronously by the bevel gears (326) to adjust the plurality of sliding blocks (324) synchronously, and the sliding blocks (324) are matched with the bearing chambers of the end covers (80) to be measured.

6. The end cap runout detection apparatus of claim 5, wherein, The lead screw (323) is a trapezoidal lead screw (323), and the sliding block (324) is matched therewith.

7. The end cap runout detection apparatus of claim 5, wherein, The middle part of the claw block (322) is provided with a rubber layer, and the thickness of the rubber layer of the claw block (322) gradually decreases from the middle part to both sides, so that the contact area with the bearing chamber of the end cover (80) to be tested is increased in a deformation mode to avoid the generation of clamping gaps.

8. The end cap runout detection apparatus of claim 1, wherein, The rotating bearing assembly further comprises a bottom plate (60) and a protective cover (70), the bottom plate (60) is fixedly connected with the mandrel (20), the protective cover (70) is sleeved outside the mandrel (20) and the rotating seat (40), and the magnetic dial indicator (90) is installed on the protective cover (70).

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