Bearing ring heat treatment device

Abstract

The utility model provides a bearing ring heat treatment device which comprises a supporting plate, a mandrel, a plurality of shaping blocks, an expansion core and a jacking mechanism, the mandrel is rotationally arranged on the supporting plate, the shaping blocks are arranged around the mandrel, the inner side face of each shaping block is an inverted cone-shaped cambered surface, the expansion core is sleeved on the mandrel, the expansion core is of an inverted cone structure, and the jacking mechanism is arranged on the supporting plate. The large end of the expansion core is matched with the jacking locking structure; the jacking mechanism comprises a guide cylinder and a jacking cylinder, the guide cylinder is fixed to the supporting plate, the jacking cylinder is arranged in the guide cylinder, and the jacking cylinder can only move in the vertical direction of the guide cylinder. According to the utility model, the expansion core and the shaping block act together to expand the bearing ring and prevent the bearing ring from deformation in the heat treatment process, and the jacking mechanism is used for jacking the expansion core and quickly releasing the interference assembly relationship between the expansion core and the inverted conical hole enclosed by the shaping block, that is, the expansion state of the shaping block is released, so that the bearing ring is convenient to demould.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bearing production field, especially a bearing ring heat treatment device. BACKGROUND

[0002] Bearing ring heat treatment includes quenching heat treatment and tempering heat treatment, and bearing ring may be deformed after heat treatment, which leads to bearing ring roundness out of tolerance and affects normal use of the bearing. At present, the bearing ring is shaped by a common ejector rod type shaping device after heat treatment to ensure that the roundness meets the requirements. However, the ejector rod type shaping device has the problems of small versatility and high difficulty in demolding of the bearing ring. SUMMARY

[0003] Therefore, the utility model aims at providing a bearing ring heat treatment device to prevent deformation of the bearing ring after heat treatment and facilitate demolding of the bearing ring after heat treatment.

[0004] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0005] A bearing ring heat treatment device comprises a support plate and the following components:

[0006] A mandrel is rotationally arranged on the support plate;

[0007] A plurality of shaping blocks are uniformly arranged around the mandrel, and each shaping block is slidingly connected to the mandrel in the radial direction and the support plate. The inner side surface of the shaping block is a reverse tapered arc surface, and the inner side surfaces of the plurality of shaping blocks form a reverse tapered hole.

[0008] An expansion mandrel is movably sleeved on the mandrel. The expansion mandrel has a reverse pyramid structure matching the inner side surface of the shaping block. The small end of the expansion mandrel is inserted into the reverse tapered hole formed by the plurality of shaping blocks. A cavity is formed in the small end surface of the expansion mandrel. The large end of the expansion mandrel matches a jacking and locking structure.

[0009] A jacking mechanism comprises a guide cylinder and a jacking cylinder. The guide cylinder is fixed to the support plate. The jacking cylinder is arranged in the guide cylinder. Limiting structures are arranged between the jacking cylinder and the guide cylinder in the circumferential direction to allow the jacking cylinder to move vertically along the guide cylinder. The jacking cylinder is sleeved on the mandrel and is threadedly connected to the mandrel.

[0010] Further, the mandrel comprises a convex ring portion, a first positioning portion, a first threaded portion, a second positioning portion, and a second threaded portion arranged in sequence from bottom to top. The diameter of the mandrel gradually decreases from the first positioning portion, the first threaded portion, the second positioning portion, and the second threaded portion. The mandrel is rotationally connected to the support plate through the first positioning portion. The convex ring portion abuts against the bottom surface of the support plate. The expansion mandrel is movably connected to the second positioning portion.

[0011] The top pressing locking structure comprises a nut matched with the second threaded part, and the nut is locked with the large end of the expansion core;

[0012] The jacking cylinder and the guide cylinder are in position corresponding to the first threaded part, and the jacking cylinder is threadedly connected with the first threaded part.

[0013] Further, the bottom surface of the support plate is provided with a limiting ring corresponding to the convex ring part, and an annular groove is formed between the limiting ring and the bottom surface of the support plate, and the convex ring part is rotationally arranged in the annular groove.

[0014] Further, the bottom end of the mandrel is provided with a nut, and the nut protrudes from the lower end surface of the limiting ring.

[0015] Further, the inner hole of the guide cylinder is a square hole or an inner hexagonal hole, and the jacking cylinder has a shape corresponding to the inner hole of the guide cylinder.

[0016] Further, the top end of the mandrel is milled with a square part and a square hole hand wheel.

[0017] Further, the bottom surface of the sizing block is attached to the top surface of the support plate.

[0018] The support plate is provided with a sliding groove corresponding to each sizing block, the bottom surface of the sizing block is provided with a guide part matched with the sliding groove, and the guide part is slidingly arranged in the sliding groove.

[0019] Further, the left and right sides of the lower end of the guide part are respectively provided with limiting parts, and the limiting parts are arranged close to the bottom surface of the support plate.

[0020] Compared with the prior art, the bearing ring heat treatment device has the following advantages:

[0021] In the utility model, the inner ring surface of the bearing ring is supported by the sizing block, the sizing block is expanded and tightened by the expansion core, and then the bearing ring is tightened, the deformation of the bearing ring in the heat treatment process is prevented, and the quality of the bearing ring after heat treatment is ensured; the jacking mechanism is used for jacking the expansion core, and the interference assembly relationship between the expansion core and the inverted conical hole formed by the sizing block is quickly released, that is, the sizing block is released from the tight state, and the bearing ring is conveniently demolded. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings constituting a part of the utility model are used to provide further understanding of the utility model, and the illustrative embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute improper limitation on the utility model. In the drawings:

[0023] Figure 1 The utility model discloses a bearing ring heat treatment device structure schematic view;

[0024] Figure 2This is a top view of a bearing ring heat treatment device according to an embodiment of the present invention;

[0025] Figure 3 This is a top view of the guide tube and lifting tube assembly in this embodiment;

[0026] Figure 4 This is the main view of the shaping block in this embodiment;

[0027] Figure 5 This is a top view of the shaping block in this embodiment;

[0028] Figure 6 This is the left view of the shaping block in this embodiment;

[0029] Explanation of reference numerals in the attached figures:

[0030] 1-Support plate; 101-Slide groove; 2-Shaping block; 21-Guide part; 22-Limiting part; 3-Expanding core; 4-Guide cylinder; 5-Lifting cylinder; 6-Mandrel; 61-Nut; 62-Protruding ring part; 63-First positioning part; 64-First threaded part; 65-Second positioning part; 67-Second threaded part; 68-Cuboid part; 7-Nut; 8-Limiting ring; 9-Bearing ring. Detailed Implementation

[0031] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] like Figure 1 , Figure 2 As shown, a bearing ring heat treatment device includes a support plate 1, a mandrel 6, several shaping blocks 2, and an expansion mandrel 3. The mandrel 6 is vertically arranged and rotatably mounted on the support plate 1. The shaping blocks 2 are evenly arranged around the mandrel 6, and their outer surfaces are used to fit and tighten the bearing rings. A gap is left between each pair of adjacent shaping blocks 2. Each shaping block 2 is slidably connected to the support plate 1 along the radial direction of the mandrel, allowing the shaping blocks 2 to move radially along the mandrel 6. By adjusting the position of the shaping blocks 2 radially along the mandrel 6, the tightening of bearing rings with different inner diameters can be achieved. The inner surface of the shaping blocks 2 is an inverted conical arc surface, and the inner surfaces of the several shaping blocks 2 together form an inverted conical hole structure. The expansion core 3 is movably mounted on the spindle 6. The expansion core 3 is an inverted cone structure that matches the side surface and the inner surface of the shaping block 2. Its small end is inserted into the inverted cone-shaped hole formed by the several shaping blocks 2. A cavity is opened on the small end face of the expansion core 3, that is, the end face facing the support plate 1. The large end of the expansion core 3 is matched with a top-pressure locking structure. The expansion core 3 is pressed down by the top-pressure locking structure, so that the expansion core 3 stably tightens the shaping block 2.

[0033] In the utility model, the side surface of the expanding core 3 is a conical surface matched with the inner side surface of the shaping block 2, the expanding core 3 can expand the shaping block 2, the shaping block 2 is expanded to the bearing sleeve circle sleeved on the outer side surface thereof, and deformation of the bearing sleeve circle during heat treatment is prevented.

[0034] The supporting plate 1 is provided with a jacking mechanism corresponding to the cavity bottom of the cavity, and the jacking mechanism comprises a guide cylinder 4 and a jacking cylinder 5; the guide cylinder 4 and the jacking cylinder 5 are both sleeved on the mandrel 6, wherein the guide cylinder 4 is fixed on the supporting plate 1, the jacking cylinder 5 is vertically movably sleeved in the guide cylinder 4, and a limiting structure is arranged between the jacking cylinder 5 and the guide cylinder 4 in the circumferential direction, so that the jacking cylinder 5 can only move vertically along the guide cylinder 4. When the bearing sleeve circle needs to be demolded from the shaping block after heat treatment, the jacking cylinder 5 jacks up the expanding core 3, the expanding relationship between the expanding core 3 and the shaping block 2 is quickly released, the shaping block 2 is released from the expanded state, and the bearing sleeve circle is conveniently demolded from the shaping block 2.

[0035] In the utility model, the mandrel 6 comprises a convex ring part 62, a first positioning part 63, a first threaded part 64, a second positioning part 65 and a second threaded part 67 which are sequentially arranged from bottom to top, the diameter of the first positioning part 63 is greater than that of the first threaded part 64, the diameter of the first threaded part 64 is greater than that of the second positioning part 65, the diameter of the second positioning part 65 is greater than that of the second threaded part 67, the supporting plate 1 is provided with a positioning hole matched with the first positioning part 63, the first positioning part 63 and the positioning hole are assembled, so that the mandrel 6 and the supporting plate 1 are rotationally connected, and at this time, the convex ring part 62 abuts against the bottom surface of the supporting plate 1. The expanding core 3 is provided with a positioning hole matched with the second positioning part 65, and the expanding core 3 is movably connected with the second positioning part 65 through the positioning hole. The jacking and locking structure comprises a nut 7 matched with the second threaded part 67, the nut 7 is locked and matched with the large end of the expanding core 3, and the expanding core 3 of the expanded shaping block 2 is locked and fixed through the nut 7. The position of the jacking cylinder 5 corresponds to the first threaded part 64, the jacking cylinder 5 is provided with a threaded hole corresponding to the first threaded part 64, and the jacking cylinder 5 and the first threaded part 64 are screw-connected.

[0036] In the utility model, the assembly top view of the guide cylinder 4 and the jacking cylinder 5 is as shown in Figure 3 The inner hole of the guide cylinder 4 is a hexagonal hole, and the outer shape of the jacking cylinder 5 is a hexagonal prism structure corresponding to the inner hole of the guide cylinder 4, so that the jacking cylinder 5 can only move up and down in the guide cylinder 4, and cannot relatively rotate. When the mandrel 6 rotates, the jacking cylinder 5 can move upward and jack up the expanding core 3 due to the screw connection between the jacking cylinder 5 and the first threaded part 64 of the mandrel 6. The inner hole of the guide cylinder 4 can also be a square hole, and correspondingly, the outer shape of the jacking cylinder 5 is a quadrangular prism structure.

[0037] The utility model discloses, the bottom surface corresponding convex ring part 62 of support plate 1 sets up limit ring 8, and limit ring 8 and support plate 1 bottom surface form annular groove between, and convex ring part 62 rotationally arranged in this annular groove, namely, at this time, the upper end surface of convex ring part 62 is attached to the bottom surface of support plate 1, and the lower end surface of convex ring part 62 is attached to the upper end surface of limit ring 8. The structure vertical limiting core shaft 6 position, prevent core shaft 6 from falling, and conveniently rotate core shaft 6, make the lifting cylinder 5 go up and lift the core.

[0038] For the convenience of rotating the core shaft 6, the utility model discloses that the top end of the core shaft 6 is milled with a cube part 68, which is matched with a square hole hand wheel. When the expansion core 3 needs to be lifted, the square hole hand wheel can be used in cooperation with the cube part 68, the square hole hand wheel is manually rotated to drive the core shaft 6 to rotate, and then the lifting cylinder 5 is moved upward to lift the expansion core 3.

[0039] As an optimization, a nut 61 is fixedly arranged at the bottom end of the core shaft 6. The nut is a hexagonal nut, and the nut 61 protrudes from the lower end surface of the limit ring 8. Through the structure, the core shaft 6 can also be rotated, for example, a wrench matched with the nut 61 can be used to rotate the core shaft, so that the lifting cylinder 5 moves upward to lift the expansion core 3.

[0040] As shown in Figure 1 , 2 As shown in Figure 4 , Figure 5 and Figure 6 , a guide part 21 matched with the sliding groove 101 is arranged at the bottom surface of the shaping block 2, and limit parts 22 are respectively welded at the left and right sides of the lower end of the guide part 21. During assembly, the guide part 21 is arranged in the sliding groove 101 and is in sliding connection with the sliding groove 101, the bottom surface of the shaping block 2 is attached to the top surface of the support plate 1, and the limit parts 22 are tightly arranged against the bottom surface of the support plate 1. Through the structure, the shaping block 2 is in sliding connection with the support plate 1 along the radial direction of the core shaft 6, and the stability of the sliding connection is improved.

[0041] The operation process of the utility model is as follows: the bearing ring 9 is sleeved on the plurality of shaping blocks 2, as shown in Figure 1 , the expansion core 3 is pushed downward until the expansion core 3 is tightly expanded on the shaping block 2, at this time, the shaping block 2 is tightly expanded on the bearing ring 9, the nut 7 is tightened to lock and fix the expansion core, and the bearing ring 9 is tightly fixed. After the bearing ring 9 is heat treated, the nut 7 is loosened first, and the tight locking of the expansion core is released, then the core shaft 6 is rotated, the lifting cylinder 5 moves upward, when the top end of the lifting cylinder 5 abuts against the cavity bottom of the expansion core 3, the core shaft 6 is continuously rotated, the lifting cylinder 5 continuously moves upward, and the expansion core 3 is lifted. When the expansion core 3 is lifted, it is indicated that the expansion core 3 is separated from the shaping block 2, the shaping block 2 is loose, and the bearing ring 9 can be quickly demolded and taken out from the shaping block 2.

[0042] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A bearing ring heat treatment apparatus characterized by: The utility model relates to a kind of jacking device, including support plate (1), and: Mandrel (6), rotation is set in support plate (1); Several shaping blocks (2), evenly set around mandrel (6), and each shaping block (2) is connected along the radial direction of mandrel and support plate (1) sliding, the inner side of shaping block (2) is inverse taper arc surface, the inner side of the several shaping blocks (2) is enclosed and forms inverse taper hole; Rising core (3), movable sleeve is set on mandrel (6), rising core (3) is inverse pyramid structure matching the inner side of shaping block (2), the small end of rising core (3) is inserted into the inverse taper hole enclosed by several shaping blocks (2), the small end surface of rising core (3) is provided with cavity, and the big end of rising core (3) is matched and is pressed and locked structure; Jacking mechanism, including guide cylinder (4) and jacking cylinder (5), the guide cylinder (4) is fixed on support plate (1), the jacking cylinder (5) is set in guide cylinder (4), and the circumferential direction between jacking cylinder (5) and guide cylinder (4) is provided with limiting structure, so that jacking cylinder (5) can only be moved vertically along guide cylinder (4), the jacking cylinder (5) is sleeved in mandrel (6) outside and is connected with mandrel (6) screw thread.

2. A bearing ring heat treatment apparatus as claimed in claim 1, wherein: The mandrel (6) includes convex ring part (62), first positioning part (63), first threaded part (64), second positioning part (65) and second threaded part (67) sequentially arranged from bottom to top, the diameter of the mandrel gradually decreases from the first positioning part (63) to the first threaded part (64), the second positioning part (65) and the second threaded part (67), the mandrel (6) is rotationally connected with the support plate (1) through the first positioning part (63), the convex ring part (62) abuts against the bottom surface of the support plate (1), and the rising core (3) is movably connected with the second positioning part (65); The pressed and locked structure includes the nut (7) matched with the second threaded part (67), and the nut (7) is locked and matched with the big end of the rising core (3); The jacking cylinder (5) and the guide cylinder (4) are correspondingly positioned with the first threaded part (64), and the jacking cylinder (5) and the first threaded part (64) are screw-connected.

3. A bearing ring heat treatment apparatus as claimed in claim 2, wherein: The bottom surface of the support plate (1) is provided with a limiting ring (8) corresponding to the convex ring part (62), an annular groove is formed between the limiting ring (8) and the bottom surface of the support plate (1), and the convex ring part (62) is rotationally arranged in the annular groove.

4. A bearing ring heat treatment apparatus as claimed in claim 3, wherein: The bottom end of the mandrel (6) is fixed with a nut (61), and the nut (61) protrudes from the lower end surface of the limiting ring (8).

5. The bearing ring heat treating apparatus of claim 1 wherein: The inner hole of the guide cylinder (4) is a square hole or an inner hexagonal hole, and the jacking cylinder (5) has a prismatic structure corresponding to the inner hole of the guide cylinder (4).

6. The bearing ring heat treating apparatus of claim 1 wherein: The top end of the mandrel (6) is milled with a cubic part (68) and a square hole hand wheel.

7. The bearing ring heat treating apparatus of claim 1 wherein: The bottom surface of the shaping block (2) is attached to the top surface of the support plate (1); The support plate (1) is provided with a sliding groove (101) corresponding to each shaping block (2), the bottom surface of the shaping block (2) is provided with a guide part (21) matched with the sliding groove (101), and the guide part (21) is slidingly arranged in the sliding groove (101).

8. A bearing ring heat treatment apparatus as claimed in claim 7, wherein: The left and right sides of the lower end of the guide part (21) are respectively provided with limiting parts (22), and the limiting parts (22) are arranged close to the bottom surface of the support plate (1).

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