End face clamping device for machining thin-wall bearing ring

Abstract

The utility model relates to an end face clamping device for machining a thin-wall bearing ring, which comprises a supporting seat sleeve fixedly connected on a lathe headstock, a turning spindle is pivoted in the supporting seat sleeve, the front end of the turning spindle extends out of the supporting seat sleeve to form a retaining disc, a piston hole is formed at the rear end of the turning spindle, and a clamping shaft is inserted in a positioning hole of the turning spindle. A spiral groove is formed in the outer wall of the clamping shaft, a piston column is inserted into the piston hole, a plurality of pin shafts are fixedly connected to the outer wall of the piston column in an inserted mode, and the outer ends of the pin shafts are inserted into the spiral groove. A connecting shaft is formed at the rear end of the piston column, and a hydraulic oil hole is formed in the connecting shaft; the front end of the clamping shaft extends out of the baffle disc to be sleeved with a lining in an inserted mode, a limiting stud is formed at the front end of the clamping shaft, a gasket and an end face pressing block are sleeved on the limiting stud in an inserted mode, and the front end of the limiting stud extends out of the end face pressing block to be connected with a locking nut in a screwed mode. According to the device, the inner wall of the thin-wall bearing ring is supported, meanwhile, the end face of the ring is clamped, and the thin-wall bearing ring can be stably and conveniently clamped on a lathe.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of collet clamping structure, more particularly to an end face clamping device for machining thin-wall bearing collet. BACKGROUND

[0002] Rolling bearing is a key component of aero-engine, and the bearing plays a role in bearing and transmitting load, and is a vulnerable part with frequent faults, and its running state has a direct influence on the working state of the whole engine, and the thin-wall bearing is widely applied in aero-engine at present due to the weight and structure space limitation. The thin-wall bearing is also composed of a collet, a ball and a retainer, and compared with the conventional rolling bearing, the thin-wall bearing for aero-engine is more precise and more complex in machining. For example, the turning machining of the thin-wall bearing collet, the inner wall of the conventional bearing collet can be clamped to machine the outer wall of the collet, but the thickness of the thin-wall bearing collet for aero-engine is small, and the clamping of the inner wall needs appropriate force, and if the force is too large, the collet is prone to deformation and damage, and if the force is too small, the collet is prone to falling off during turning, so a clamping device for clamping the collet is needed. SUMMARY

[0003] The utility model discloses a kind of end face clamping devices for machining thin-wall bearing collet, it is clamped to the end face of collet while supporting the inner wall of thin-wall bearing collet, can realize the clamping of thin-wall bearing collet firmly and conveniently on lathe.

[0004] An end face clamping device for machining thin-wall bearing collet, including support seat sleeve that is fixed on the headstock of lathe, support seat sleeve is pivoted with turning main shaft in it, the front end of turning main shaft is formed with baffle disc out of support seat sleeve, the rear end of turning main shaft is formed with piston hole in the middle, a plurality of positioning holes are formed on the turning main shaft around piston hole, the inner wall of the rear side of piston hole is formed with a plurality of limit grooves that are communicated with positioning hole;T-shaped clamping shaft is inserted into the positioning hole of turning main shaft, the outer wall of the rear part of clamping shaft is formed with helical groove, piston column is inserted into the piston hole of turning main shaft, a plurality of pin shafts are inserted and fixed on the outer wall of piston column, the outer end of pin shaft is respectively inserted into the helical groove of clamping shaft;the center of the rear end face of piston column is formed with connecting shaft, and hydraulic oil hole is formed through the front end face of piston column on connecting shaft;

[0005] The front end of clamping shaft is inserted into bushing out of baffle disc, the center of the front end face of clamping shaft is formed with limit stud, gasket and end face pressing block are inserted into limit stud, locking nut is screwed on the front end of end face pressing block out of limit stud, gasket and end face pressing block are clamped and fixed between bushing and locking nut;

[0006] The end face pressing block is composed of a circular hub part sleeved on the limiting stud and an isosceles trapezoidal clamping part, and an obliquely arranged clamping end face is formed on the rear end face of the clamping part.

[0007] Preferably, the diameter of the piston column is equal to the hole diameter of the piston hole on the turning spindle, a gap is arranged between the front end of the piston column and the bottom surface of the piston hole, and a plurality of piston rings are sleeved and fixed on the outer wall of the front end of the piston column and are pressed against the inner wall of the piston hole.

[0008] Preferably, the rear end of the connecting shaft protrudes from the turning spindle, and the diameter of the connecting shaft is smaller than the diameter of the piston column.

[0009] The diameter of the rear end of the clamping shaft is greater than the center distance from the inner wall of the piston hole to the positioning hole.

[0010] Preferably, the distance from the pin shaft to the front end of the piston column is greater than the length of the limiting groove on the turning spindle.

[0011] Preferably, the limiting stud on the clamping shaft is a cylindrical stud, and a planar slot is formed on the outer wall on both sides of the stud, and the circular hub part of the end face pressing block is formed with a limiting insertion hole which is the same as the axial section of the limiting stud.

[0012] Preferably, the center distance from the outer ring of the clamping part on the end face pressing block to the limiting stud is greater than the diameter of the outer wall of the bushing.

[0013] Preferably, the diameter of the gasket is not greater than the diameter of the outer wall of the bushing, and the diameter of the inner wall of the bushing is equal to the diameter of the clamping shaft.

[0014] The beneficial effects of the present application are as follows:

[0015] The device can support the inner wall of the thin-wall bearing ring and clamp the end face of the ring at the same time, can stably and conveniently clamp the thin-wall bearing ring on the lathe, and facilitates the machining of the thin-wall bearing. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is a three-dimensional structure schematic view of the present application;

[0017] Fig. 2 It is a front view structure schematic view of the present application;

[0018] Fig. 3 It is a half-cut structure schematic view of the present application in the side view direction.

[0019] In the figure: 1, support seat cover; 2, turning main shaft; 21, baffle disc; 22, piston hole; 23, positioning hole; 24, limiting groove; 3, clamping shaft; 31, spiral groove; 32, limiting stud; 4, piston column; 41, connecting shaft; 42, hydraulic oil hole; 5, pin shaft; 7, washer; 8, end face pressing block; 81, clamping end face; 9, locking nut; 10, piston ring. DETAILED DESCRIPTION

[0020] Embodiment: see Figs. 1 to 3 As shown in the figure, an end face clamping device for machining thin-wall bearing ring, comprising a support seat cover 1 fixed on the head seat of lathe, a turning main shaft 2 pivotally connected in the support seat cover 1, the front end of the turning main shaft 2 extends out of the support seat cover 1 and is formed with a baffle disc 21, the rear end of the turning main shaft 2 is formed with a piston hole 22 in the middle, a plurality of positioning holes 23 are formed around the piston hole 22 on the turning main shaft 2 and are evenly distributed in a ring shape around the center axis of the turning main shaft 2, a plurality of limiting grooves 24 are formed on the inner wall of the rear side of the piston hole 22 and are in communication with the positioning holes 23; the positioning hole 23 of the turning main shaft 2 is inserted with a T-shaped clamping shaft 3, the outer wall of the rear part of the clamping shaft 3 is formed with a spiral groove 31, the piston hole 22 of the turning main shaft 2 is inserted with a piston column 4, a plurality of pin shafts 5 are inserted and fixed on the outer wall of the piston column 4, and the outer ends of the pin shafts 5 are respectively inserted in the spiral groove 31 of the clamping shaft 3; the center of the rear end face of the piston column 4 is formed with a connecting shaft 41, and the connecting shaft 41 is formed with a hydraulic oil hole 42 penetrating through the front end face of the piston column 4;

[0021] The front end of the clamping shaft 3 extends out of the baffle disc 21 and is inserted with a bushing 6, the center of the front end face of the clamping shaft 3 is formed with a limiting stud 32, the limiting stud 32 is inserted with a washer 7 and an end face pressing block 8, the front end of the limiting stud 32 extends out of the end face pressing block 8 and is screwed with a locking nut 9, and the washer 7 and the end face pressing block 8 are clamped and fixed between the bushing 6 and the locking nut 9;

[0022] The end face pressing block 8 is composed of a circular hub part and an isosceles trapezoidal clamping part which are sleeved on the limiting stud 32, and the rear end face of the clamping part is formed with an obliquely arranged clamping end face 81.

[0023] The diameter of the piston column 4 is equal to the hole diameter of the piston hole 22 on the turning main shaft 2, there is a gap between the front end of the piston column 4 and the bottom surface of the piston hole 22, a plurality of piston rings 10 are inserted and fixed on the outer wall of the front end of the piston column 4, the piston rings 10 are pressed against the inner wall of the piston hole 22, and the sealing between the piston column 4 and the piston hole 22 is ensured through the piston rings 10.

[0024] The rear end of the connecting shaft 41 extends out of the turning main shaft 2, and the diameter of the connecting shaft 41 is smaller than the diameter of the piston column 4;

[0025] The diameter of the rear end of the clamping shaft 3 is greater than the center distance from the inner wall of the piston hole 22 to the positioning hole 23. That is, the rear end of the clamping shaft 3 is located at the rear end of the piston rod 4, which can restrict the piston rod 4 from disengaging from the turning spindle 2.

[0026] The distance between the upper pin 5 of the piston rod 4 and the front end of the piston rod 4 is greater than the length of the upper limit groove 24 of the turning spindle 2, so as to limit the front end of the piston rod 4 to move to the limit groove 24 of the turning spindle 2, and prevent the hydraulic oil injected into the piston hole 22 through the piston rod 4 from leaking.

[0027] The limiting stud 32 on the clamping shaft 3 is a cylindrical stud with planar grooves formed on the outer walls on both sides. The circular hub of the end face pressure block 8 has a limiting insertion hole with the same axial cross section as the limiting stud 32. The end face pressure block 8 and the limiting stud 32 cannot rotate radially relative to each other.

[0028] The center distance between the outer ring of the clamping part on the end face pressure block 8 and the center distance between the limit stud 32 and the outer wall of the bushing 6 is greater than the diameter of the outer wall of the bushing 6. During the rotation of the end face pressure block 8, it is necessary to press the end face of the outer ring of the thin-walled bearing ring, while the outer wall of the bushing 6 is supported on the inner wall of the thin-walled bearing ring.

[0029] The diameter of the washer 7 is not greater than the diameter of the outer wall of the bushing 6, and the diameter of the inner wall of the bushing 6 is equal to the diameter of the clamping shaft 3. The clamping shaft 3 can position the bushing 6.

[0030] Working principle: This structure is an end face clamping device for machining thin-walled bearing rings. It is a clamping structure set on the lathe head. During clamping, the thin-walled ring is placed on the outside of all bushings 6 and supported by the bushings 6 on the inner wall of the thin-walled ring. Then, hydraulic oil is injected into the hydraulic oil hole 42 of the piston column 4. The hydraulic oil drives the piston column 4 to move backward, which in turn drives the pin 5 to move backward. The pin 5 moves backward in the spiral groove 31, causing the clamping shaft 3 to rotate. The rotation of the clamping shaft 3 can realize the rotation of the end face pressure block 8, so that the clamping end face 81 on the end face pressure block 8 presses against the front end face of the thin-walled ring, and the rear end face of the thin-walled ring abuts against the retaining plate 21; thus, the clamping is completed and the clamping is stable.

[0031] When clamping thin-walled rings of different sizes, the above method is used by replacing the bushings 6, washers 7 and end face pressure blocks of different sizes.

[0032] The embodiments described above are illustrative of the present invention and are not intended to limit the present invention. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be as set forth in the claims.

Claims

1. A kind of end face clamping device of processing thin-walled bearing ring, including the support seat cover (1) being fixed on lathe headstock, pivot is connected in the support seat cover (1) with the turning main shaft (2), the front end of the turning main shaft (2) is extended support seat cover (1) and is formed with baffle disc (21), the middle part of rear end is formed with piston hole (22), it is characterized by: A plurality of positioning holes (23) are uniformly distributed around the center axis of the turning spindle (2) and are formed on the turning spindle (2) around the piston hole (22), and a plurality of limiting grooves (24) are formed on the inner wall of the rear side of the piston hole (22) and are communicated with the positioning holes (23); a T-shaped clamping shaft (3) is inserted into the positioning hole (23) of the turning spindle (2), a spiral groove (31) is formed on the outer wall of the rear part of the clamping shaft (3), a piston column (4) is inserted into the piston hole (22) of the turning spindle (2), a plurality of pin shafts (5) are inserted and fixed on the outer wall of the piston column (4), and the outer ends of the pin shafts (5) are respectively inserted into the spiral groove (31) of the clamping shaft (3); a connecting shaft (41) is formed on the center of the rear end face of the piston column (4), and a hydraulic oil hole (42) penetrating the front end face of the piston column (4) is formed on the connecting shaft (41). The front end of the clamping shaft (3) protrudes out of the disc (21) and is inserted into a bushing (6), a limiting stud (32) is formed on the center of the front end face of the clamping shaft (3), a washer (7) and an end face pressing block (8) are inserted into the limiting stud (32), a locking nut (9) is screwed on the front end of the limiting stud (32) and protrudes out of the end face pressing block (8), and the washer (7) and the end face pressing block (8) are clamped and fixed between the bushing (6) and the locking nut (9). The end face pressing block (8) is composed of a circular hub part and an isosceles trapezoidal clamping part, and an obliquely arranged clamping end face (81) is formed on the rear end face of the clamping part.

2. A device for machining the end face of a thin-walled bearing ring according to claim 1, characterized in that The diameter of the piston column (4) is equal to the hole diameter of the piston hole (22) on the turning spindle (2), a gap is provided between the front end of the piston column (4) and the bottom face of the piston hole (22), a plurality of piston rings (10) are inserted and fixed on the outer wall of the front end of the piston column (4), and the piston rings (10) are pressed against the inner wall of the piston hole (22).

3. A device for machining the end face of a thin-walled bearing ring according to claim 2, characterized in that The rear end of the connecting shaft (41) protrudes out of the turning spindle (2), and the diameter of the connecting shaft (41) is smaller than the diameter of the piston column (4). The diameter of the rear end of the clamping shaft (3) is greater than the center distance from the inner wall of the piston hole (22) to the positioning hole (23).

4. A device for machining the end face of a thin-walled bearing ring according to claim 3, characterized in that: The spacing between the pin shafts (5) on the piston column (4) and the front end of the piston column (4) is greater than the length of the limiting groove (24) on the turning spindle (2).

5. The apparatus of claim 1 wherein: The limiting stud (32) on the clamping shaft (3) is a cylindrical stud, and flat grooves are formed on the outer walls on both sides of the stud, and the circular hub part of the end face pressing block (8) is formed with a limiting insertion hole which is the same as the axial section of the limiting stud (32).

6. A device for machining the end face of a thin-walled bearing ring according to claim 1, characterized in that: The center distance from the outer circle of the clamping part of the end face pressing block (8) to the limiting stud (32) is greater than the diameter of the outer wall of the bushing (6).

7. A device for machining the end face of a thin-walled bearing ring according to claim 6, characterized in that The diameter of the washer (7) is not greater than the diameter of the outer wall of the bushing (6), and the diameter of the inner wall of the bushing (6) is equal to the diameter of the clamping shaft (3).

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