Fixing device for bearing polishing

Abstract

The fixing device comprises a base, a supporting mechanism, a clamping mechanism and a driving mechanism, a guide rail is arranged at the top of the base, the guide rail is connected with the supporting mechanism, the supporting mechanism comprises a vertically-arranged threaded rod, a lifting block connected to the threaded rod in a sleeved mode and a rotating platform fixed to the top of the lifting block, and the rotating platform is connected with the clamping mechanism. The clamping mechanism comprises sliding clamping blocks symmetrically distributed on the two sides of the rotating platform. The height of the platform is adjusted by rotating the lifting block through guide fit between the base guide rail and the threaded rod of the supporting mechanism. A rolling friction pair is formed by a ball support on the top of the lifting block and a ball groove in the bottom of the rotating platform, and smooth rotating of the platform is guaranteed. The sliding clamping blocks on the two sides are driven by the reverse threads to synchronously and oppositely move, and symmetrical clamping of the bearing outer ring is achieved through the V-shaped grooves. The axial positioning column is inserted into a bearing inner hole to achieve accurate centering, and a three-dimensional positioning system is formed. And the platform can be locked at an angle of 0-180 degrees.

Description

TECHNICAL FIELD

[0001] The utility model relates to fixed device technical field, concretely is a kind of fixed device for bearing polishing. BACKGROUND

[0002] As the core component of mechanical transmission system, the geometric precision of inner and outer ring raceway and end face of bearing directly affects the equipment running life and performance. In the bearing manufacturing process, polishing is the key process to ensure surface roughness (Ra≤0.4 μm) and form tolerance (roundness error <0.005 mm). The traditional manual clamping device (such as bolt pressing plate) cannot realize dynamic balance adjustment, which is easy to cause bearing radial runout at high speed polishing, resulting in surface waviness exceeding the standard, and low processing precision, lack of operation intelligence. SUMMARY

[0003] In order to overcome the deficiencies of prior art, the utility model provides a kind of fixed device for bearing polishing, can effectively solve the problems raised in background art.

[0004] The technical scheme adopted by the utility model to solve its technical problems is:

[0005] A kind of fixed device for bearing polishing, including base, support mechanism, clamping mechanism and drive mechanism, the base top is equipped with guide rail, the guide rail is connected with support mechanism, the support mechanism includes vertically arranged screw rod, lifting block of sleeve joint on screw rod and the rotating platform fixed to the top of lifting block, the clamping mechanism includes symmetrically distributed sliding clamping block in the rotating platform two sides, V-shaped groove adapted to bearing outer ring is equipped in the inboard of sliding clamping block, the drive mechanism is located at the rear end of rotating platform, the drive mechanism includes bidirectional screw rod, the bidirectional screw rod is connected with the sliding clamping block of two sides, the bidirectional screw rod drives the synchronous movement of sliding clamping block along the horizontal direction of rotating platform.

[0006] As a further description of the above technical scheme, the support mechanism further includes guide rod, the guide rod is arranged parallel to screw rod, and penetrates the lifting block and is fixed by limiting nut.

[0007] As a further description of the above technical scheme, the bottom of rotating platform is equipped with annular ball groove, the top of lifting block is correspondingly equipped with ball support, and steel ball is embedded in ball support to cooperate with ball groove.

[0008] As a further description of the above technical scheme, the thread rotation direction of bidirectional screw rod is opposite at both ends, and is engaged with the threaded hole of the bottom of sliding clamping block, the drive mechanism further includes servo motor for driving the rotation of bidirectional screw rod.

[0009] As a further description of the above technical scheme, the V-shaped groove surface of the sliding clamping block is provided with a detachable anti-skid pad, and the anti-skid pad is made of polyurethane or rubber.

[0010] As a further description of the above technical scheme, the guide rail of the base is provided with a scale ruler, and the lifting block of the two side support mechanisms is provided with a pointer corresponding to the scale ruler.

[0011] As a further description of the above technical scheme, the front end of the rotating platform is provided with an angle adjusting mechanism, and the angle adjusting mechanism comprises a sector gear fixed on the lifting block and a locking knob engaged with the sector gear.

[0012] As a further description of the above technical scheme, the bottom of the base is provided with a damping leg, and the damping leg comprises a metal base at the upper part and an elastic buffer layer at the lower part, and the elastic buffer layer is made of silicone or nitrile rubber.

[0013] As a further description of the above technical scheme, the center of the rotating platform is provided with an axial positioning column for cooperating with the inner hole of the bearing, and the axial positioning column is a conical structure.

[0014] Compared with the prior art, the bearing polishing fixing device has the following beneficial effects:

[0015] The bearing polishing fixing device has at least one of the following beneficial effects in the process of use:

[0016] The base guide rail and the threaded rod of the support mechanism are guided and matched, the rotating lifting block realizes platform height adjustment. The ball bearing at the top of the lifting block and the ball groove at the bottom of the rotating platform form a rolling friction pair, ensuring smooth rotation of the platform. The bidirectional screw rod of the driving mechanism is driven by the servo motor, and drives the two sides of the sliding clamping block to move synchronously and oppositely through the reverse thread, and the V-shaped groove realizes the symmetrical clamping of the bearing outer ring. The axial positioning column is inserted into the inner hole of the bearing to realize accurate centering and form a three-dimensional positioning system. The platform can be locked at an angle of 0-180°. The calibration system composed of the scale ruler and the pointer cooperates with the guide rod limiting nut to accurately control the symmetrical lifting of the double support mechanisms. The damping leg absorbs equipment vibration through the elastic buffer layer, and the steel base maintains overall stability. The anti-skid pad and the V-shaped groove form a composite clamping surface, which ensures clamping force while avoiding surface damage. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is a whole structure schematic view of the bearing polishing fixing device.

[0018] Fig. 2 It is a side structure schematic view of the bearing polishing fixing device.

[0019] Fig. 3The utility model discloses a fixed device for bearing polishing perspective structure schematic diagram.

[0020] Reference signs in the drawings:

[0021] 1, base; 101, guide rail; 102, shock absorbing foot; 2, support mechanism; 201, threaded rod; 202, lifting block; 203, rotating platform; 204, guide rod; 205, ball groove; 206, locking knob; 207, sector gear; 208, axial positioning column; 3, clamping mechanism; 301, sliding clamping block; 302, V-shaped groove; 4, driving mechanism; 401, bidirectional screw rod; 402, servo motor. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0023] As Figs. 1-3 shown, the utility model provides a fixed device for bearing polishing, including base 1, support mechanism 2, clamping mechanism 3 and driving mechanism 4, the base 1 top is equipped with guide rail 101, the guide rail 101 is connected with support mechanism 2, the support mechanism 2 includes the threaded rod 201 of vertical setting, the lifting block 202 of sleeve joint on threaded rod 201 and the rotating platform 203 of fixed in the lifting block 202 top, the clamping mechanism 3 includes the sliding clamping block 301 of symmetrical distribution in rotating platform 203 both sides, the V-shaped groove 302 of being equipped with with bearing outer ring adaptation in sliding clamping block 301 inboard, the driving mechanism 4 is located rotating platform 203 rear end, the driving mechanism 4 includes bidirectional screw rod 401, the bidirectional screw rod 401 is connected both sides sliding clamping block 301, the bidirectional screw rod 401 drives sliding clamping block 301 along rotating platform 203 horizontal direction synchronous movement.

[0024] One of the embodiments, through the guide rail 101 of base 1 and the threaded rod 201 guide cooperation of support mechanism 2, rotating lifting block 202 realizes platform height adjustment. The ball support of lifting block 202 top and the ball groove 205 of rotating platform 203 bottom form rolling friction pair, ensure that platform rotates smoothly. The bidirectional screw rod 401 of driving mechanism 4 is driven under servo motor 402, through reverse thread drives both sides sliding clamping block 301 synchronous opposite movement, utilizes V-shaped groove 302 to realize the symmetrical clamping of bearing outer ring. Axial positioning column 208 inserts bearing inner hole and realizes accurate homocentric, forms three-dimensional positioning system.

[0025] In the second embodiment, the angle adjusting mechanism is connected to the locking knob 206 through the sector gear 207 to achieve 0-180° angle locking of the platform. The calibration system composed of the scale and the pointer cooperates with the guide rod 204 and the limiting nut to accurately control the symmetrical lifting of the double support mechanism 2. The shock absorbing legs 102 absorb the vibration of the equipment through the elastic buffer layer, and the steel base maintains the overall stability. The non-slip mat and the V-shaped groove 302 form a composite clamping surface to ensure clamping force while avoiding surface damage.

[0026] Further, the support mechanism 2 further comprises a guide rod 204, which is arranged parallel to the threaded rod 201 and penetrates the lifting block 202 and is fixed by a limiting nut.

[0027] The guide rod 204 is installed parallel to the threaded rod 201 and penetrates the lifting block 202. When the threaded rod 201 rotates to drive the lifting block 202 to move up and down, the guide rod 204 restricts the circumferential rotation and lateral deviation of the lifting block 202 through rigid constraint, forcing it to move linearly in the vertical direction only.

[0028] The threaded rod 201 bears the axial load of the lifting mechanism (such as the weight of the rotating platform 203 and the weight of the bearing workpiece), while the guide rod 204 bears the lateral force (such as the vibration impact force during polishing), achieving mechanical decoupling of the two axes. The limiting nut is threadedly connected with the guide rod 204, and the lifting block 202 is pressed on the side surface of the lifting block 202 by tightening the nut, and the position of the lifting block 202 is fixed by using friction force to prevent the lifting block 202 from sliding down due to gravity or vibration in the non-driven state.

[0029] Further, the bottom of the rotating platform 203 is provided with an annular ball groove 205, and the top of the lifting block 202 is correspondingly provided with a ball bracket, and the ball bracket is embedded with a steel ball matched with the ball groove 205.

[0030] The annular ball groove 205 at the bottom of the rotating platform 203 and the ball bracket at the top of the lifting block 202 form a rolling pair through the steel ball, converting traditional sliding friction (friction coefficient μ≈0.1-0.3) into rolling friction (μ≈0.001-0.005), reducing the platform rotation torque by more than 80%.

[0031] The ball bracket adopts an equiangular distribution of ball socket structures (usually spaced 15°-30°), which ensures uniform load bearing of the steel balls. The bearing pressure of each steel ball is ≤50N / mm 2 (ISO 281 standard), avoiding plastic deformation caused by local overload.

[0032] Further, the two-way screw rod 401 has opposite screw directions at both ends and is engaged with the threaded hole at the bottom of the sliding clamping block 301, and the drive mechanism 4 further comprises a servo motor 402 for driving the rotation of the two-way screw rod 401.

[0033] The two ends of the bidirectional screw rod 401 are processed into left-handed / right-handed reverse threads (thread pitch P = 2-5 mm), which are engaged with corresponding right-handed thread holes at the bottom of the sliding clamping block 301. When the servo motor 402 drives the screw rod to rotate, the reverse threads at the two ends convert the rotary motion into symmetrical linear motion of the sliding clamping block 301 (such as synchronous opening and closing of double clamping jaws), eliminating the asymmetric hysteresis error of single screw rod driving. The thread pair adopts a gap compensation pre-tightening design (interference amount 0.01-0.03 mm), which compensates for the thread engagement gap through elastic deformation, ensuring that the bidirectional repeat positioning accuracy is ≤±0.01 mm.

[0034] Further, the surface of the V-shaped groove 302 of the sliding clamping block 301 is provided with a detachable non-slip pad made of polyurethane or rubber.

[0035] The guide rail 101 of the base 1 is provided with a scale ruler, and the outer side of the lifting block 202 of the two-side supporting mechanism 2 is provided with a pointer corresponding to the scale ruler. The front end of the rotating platform 203 is provided with an angle adjusting mechanism, and the angle adjusting mechanism comprises a sector gear 207 fixed on the lifting block 202 and a locking knob 206 engaged with the sector gear 207.

[0036] The sector gear 207 (modulus m = 0.5-1.5, number of teeth Z = 60-120) is symmetrically distributed on both sides of the lifting block 202 with the rotating center shaft as the center, and the tooth surface adopts a 20° pressure angle involute tooth shape, which is precisely engaged with the spur gear (same modulus, number of teeth z = 10-15) at the end of the locking knob 206. (In the unlocked state, the rotating platform 203 can freely rotate (±30° adjustment range) around the center shaft, the sector gear 207 has a tooth pitch angle accuracy of 0.1°, which supports the micro-angle adjustment requirements of optical instrument frames, laser cutting heads and other equipment.

[0037] The locking knob 206 is internally provided with a conical expansion sleeve (taper 1:10), when the knob is rotated clockwise, the expansion sleeve expands radially to generate a locking force ≥500N, so that the meshing surface of the spur gear and the sector gear 207 forms static friction + tooth meshing double locking, and the torsional stiffness reaches 1000N·m / rad.

[0038] Further, the bottom of the base 1 is provided with a shock absorbing leg 102, the shock absorbing leg 102 comprises a metal base at the upper part and an elastic buffer layer at the lower part, and the elastic buffer layer is made of silicone or nitrile rubber. The rotating platform 203 is provided with an axial positioning column 208 at the center for cooperation with the bearing inner hole, and the axial positioning column 208 is a conical structure.

[0039] In summary, the bidirectional screw rod 401 and the threaded hole engagement structure ensure that the clamping symmetry accuracy is ≤0.02 mm, the taper design of the axial positioning column 208 adapts to the ISO standard bearing inner hole tolerance range, the scale ruler system makes the height adjustment accuracy reach the 0.1 mm level, and the sector gear 207 angle adjustment mechanism realizes the ±0.5° division accuracy.

[0040] The ball groove 205-steel ball pair reduces the torque loss of the rotating platform 203 by 40%, the guide rod 204-threaded rod 201 double-track structure improves the lateral force resistance of the support mechanism 2 to 300N, the silica gel buffer layer can attenuate more than 60% high-frequency vibration, and the Shore hardness of the non-slip pad is 55A-75A, which adapts to different polishing working condition requirements. The detachable non-slip pad supports rapid replacement, meets the needs of bearings made of different materials such as stainless steel / ceramics, the servo motor 402 drives to realize 0.01 mm level feeding accuracy, and adapts to rough grinding / fine grinding process. The angle adjustment mechanism supports five-axis linkage machine tool docking, and the shock absorbing foot 102 is modularly designed to replace different hardness buffer layers.

[0041] The overall clamping efficiency is improved by 200%, the single-piece clamping time is ≤15s, the product defect rate is reduced from 3% to 0.5% or less, the service life of the non-slip pad is 5000 clamping cycles, and the energy consumption of the servo motor 402 is reduced by 40% compared with the pneumatic system.

[0042] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A fixing device for grinding bearings, characterized in that: The system includes a base, a support mechanism, a clamping mechanism, and a drive mechanism. The base has a guide rail on its top, which connects to the support mechanism. The support mechanism includes a vertically arranged threaded rod, a lifting block sleeved on the threaded rod, and a rotating platform fixed to the top of the lifting block. The clamping mechanism includes sliding clamping blocks symmetrically distributed on both sides of the rotating platform. The inner side of each sliding clamping block has a V-groove adapted to the outer ring of a bearing. The drive mechanism is located at the rear end of the rotating platform and includes a bidirectional lead screw connecting the sliding clamping blocks on both sides. The bidirectional lead screw drives the sliding clamping blocks to move synchronously along the horizontal direction of the rotating platform.

2. The bearing grinding fixing device according to claim 1, characterized in that: The support mechanism also includes a guide rod, which is arranged parallel to the threaded rod and passes through the lifting block and is fixed by a limiting nut.

3. The bearing grinding fixing device according to claim 1, characterized in that: The bottom of the rotating platform is provided with an annular ball groove, and the top of the lifting block is provided with a corresponding ball support, with steel balls embedded in the ball support to cooperate with the ball groove.

4. The bearing grinding fixing device according to claim 1, characterized in that: The two ends of the bidirectional lead screw have opposite threads and engage with the threaded holes at the bottom of the sliding clamping block. The drive mechanism also includes a servo motor for driving the bidirectional lead screw to rotate.

5. The bearing grinding fixing device according to claim 1, characterized in that: The V-groove surface of the sliding clamping block is provided with a removable anti-slip pad, which is made of polyurethane or rubber.

6. The bearing grinding fixing device according to claim 1, characterized in that: The base has a scale on its guide rail, and the lifting blocks of the two side support mechanisms have pointers on their outer sides that correspond to the scale.

7. A fixing device for bearing grinding according to claim 1, characterized in that: The front end of the rotating platform is provided with an angle adjustment mechanism, which includes a sector gear fixed on the lifting block and a locking knob that meshes with the sector gear.

8. A fixing device for bearing grinding according to claim 1, characterized in that: The base is provided with shock-absorbing feet at the bottom. The shock-absorbing feet include an upper metal base and a lower elastic buffer layer. The elastic buffer layer is made of silicone or nitrile rubber.

9. A fixing device for bearing grinding according to claim 1, characterized in that: The rotating platform is provided with an axial positioning column at its center for engaging with the inner hole of the bearing. The axial positioning column has a conical structure.

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