Heating mechanism and bearing assembling method

Abstract

The invention relates to the technical field of bearing assembly, and provides a heating mechanism and a bearing assembly method. The heating mechanism is applied to the bearing seat, the bearing seat is provided with an inner hole used for installing a bearing, the heating mechanism is used for heating the inner hole, the heating mechanism is characterized by comprising a supporting seat and a plurality of conductive coils, the supporting seat is cylindrical, and all the conductive coils are arranged on the periphery of the supporting seat in a surrounding mode; and all the conductive coils are arranged at intervals along the axial direction of the supporting seat. And the inner hole of the bearing seat is heated in an electromagnetic heating mode, so that the inner hole of the bearing seat is expanded. And then the heating mechanism is taken out, and the bearing is placed in an inner hole of the bearing seat. And after the bearing seat is cooled, the inner hole of the bearing seat shrinks and clamps the bearing, so that the interference assembly of the bearing and the bearing seat is realized. Compared with the prior art, the heating mechanism can greatly reduce the damage degree of the bearing and the bearing seat, so that the service life of the bearing and the bearing seat after assembly is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of bearing assembly, and in particular to a heating mechanism and a bearing assembly method. Background Art

[0002] At present, the installation method of roller bearings in the industry is to press the bearings into the bearing seats by hydraulic presses. The disadvantage of the existing method is that it cannot ensure that the end face of the bearing is parallel to the surface of the bearing seat when the bearing is placed on the bearing seat, resulting in uneven force when the hydraulic press presses the bearing, which causes damage to the bearing or the bearing seat during installation, thereby affecting the service life and the accuracy of the roller after installation. Summary of the invention

[0003] The purpose of the present invention is to provide a heating mechanism and a bearing assembly method, aiming to solve the technical problem that after the existing bearing and bearing seat are assembled, both are easily damaged, resulting in a short service life of both.

[0004] In the first aspect, the present application provides a heating mechanism, which is applied to a bearing seat, the bearing seat has an inner hole for installing a bearing, and the heating mechanism is used to heat the inner hole. It is characterized in that: the heating mechanism includes a support seat and a plurality of conductive coils, the support seat is cylindrical, all the conductive coils are arranged around the outer circumference of the support seat, and all the conductive coils are arranged at intervals along the axial direction of the support seat.

[0005] The beneficial effect of the heating mechanism provided by the present invention is that when using the heating mechanism, the heating mechanism is first placed in the inner hole of the bearing seat, and then the conductive coil is energized to heat the inner hole of the bearing seat by electromagnetic heating to expand the inner hole of the bearing seat. The heating mechanism is then taken out and the bearing is placed in the inner hole of the bearing seat. After the bearing seat is cooled, the inner hole of the bearing seat shrinks and clamps the bearing, thereby achieving interference fit between the bearing and the bearing seat. Compared with the prior art, the heating mechanism can greatly reduce the degree of damage to the bearing and the bearing seat, thereby increasing the service life of the bearing and the bearing seat after assembly.

[0006] Optionally, it also includes at least one first guide block connected to the support seat. When the number of the first guide blocks is two or more, all the first guide blocks are arranged at intervals along the circumference of the support seat, wherein, in the radial direction of the support seat, the first guide blocks protrude from the outer peripheral surface of the support seat and from the outer peripheral surface of the conductive coil.

[0007] Optionally, a first fastener is further included, a first threaded hole is opened on the support seat, a first through hole is opened on the first guide block, and the first fastener passes through the first through hole and is threadedly connected to the first threaded hole.

[0008] Optionally, the first through hole is a waist-shaped hole, and the first through hole extends along the radial direction of the support seat.

[0009] Optionally, it also includes at least one second guide block connected to the support seat. When the number of the second guide blocks is more than two, all the second guide blocks are arranged at intervals along the circumference of the support seat, and the first guide block and the second guide block are respectively connected to both sides of the support seat in the axial direction, wherein, in the radial direction of the support seat, the surface of the first guide block away from the support seat is coplanar with the surface of the second guide block away from the support seat.

[0010] Optionally, a second fastener is further included, a second threaded hole is opened on the support seat, a second through hole is opened on the second guide block, and the second fastener passes through the second through hole and is threadedly connected to the second threaded hole.

[0011] Optionally, the second through hole is a waist-shaped hole, and the second through hole extends along the radial direction of the support seat.

[0012] Optionally, a handle is also included, and the handle is arranged on one side of the support base in the axial direction.

[0013] Optionally, two handles are provided, and the two handles are arranged in a circumferential annular array along the support seat.

[0014] In a second aspect, the present application provides a bearing assembly method using the above-mentioned heating mechanism, the bearing assembly method comprising:

[0015] Provide a bearing seat, the bearing seat has an inner hole for mounting the bearing, and measure the diameter d of the inner hole before being heated by the heating mechanism 1 , and measure the temperature T of the inner hole before it is heated by the heating mechanism 1 ;

[0016] Based on the outer diameter of the bearing, the diameter d of the inner hole after being heated by the heating mechanism is obtained. 2 , d 2 With d 1 The difference is recorded as Δd;

[0017] Based on the formula: And the formula: ΔT=T 2 -T 1 , the diameter of the inner hole is obtained as d 2 When the temperature of the inner hole is 2 , where α is the expansion coefficient of the bearing seat material, T 1 and T 2 The unit is ℃, d 1 and d 2 The unit is mm.

[0018] Place the heating mechanism into the inner hole of the bearing seat and start the heating mechanism until the temperature of the inner hole rises to T 2 ;

[0019] Take out the heating mechanism and place the bearing into the inner hole;

[0020] Cooling of bearing seats.

[0021] The beneficial effect of the bearing assembly method provided by the present invention is that in the prior art, the bearing is pressed into the bearing seat by a hydraulic press. In the present application, based on the thermal expansion and contraction of the bearing seat, the inner hole of the bearing seat is first heated by a heating mechanism, and after the diameter of the inner hole is expanded, the heating mechanism is taken out and the bearing is placed in the inner hole. Finally, after the bearing seat is cooled, the inner hole shrinks and clamps the bearing, thereby achieving an interference fit between the bearing and the bearing seat. The present bearing assembly method can greatly reduce the degree of damage to the bearing and the bearing seat, thereby increasing the service life of the bearing and the bearing seat after assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 An exploded view of a heating mechanism and a bearing seat provided in an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of the structure of a heating mechanism and a bearing seat provided in an embodiment of the present invention;

[0025] Figure 3 Another structural schematic diagram of the heating mechanism and the bearing seat provided in the embodiment of the present invention;

[0026] Figure 4 A schematic structural diagram of a first guide block provided in an embodiment of the present invention.

[0027] Among them, the reference numerals in the figure are:

[0028] 100. Heating mechanism; 10. Support seat; 20. Conductive coil;

[0029] 30. First guide block; 31. First through hole; 40. Second guide block;

[0030] 50. Handle; 200. Bearing seat; 210. Inner hole. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0032] Reference throughout the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, when the phrases "in one embodiment" or "in some embodiments" appear in various places throughout the specification, not all references are to the same embodiment. Furthermore, in one or more embodiments, the particular features, structures, or characteristics may be combined in any suitable manner.

[0033] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Please refer to Figures 1 to 4 Now, the heating mechanism 100 and the bearing assembly method in the embodiment of the present invention are described.

[0037] Please refer to Figures 1 to 3The heating mechanism 100 provided in the present application is applied to a bearing seat 200, and the bearing seat 200 has an inner hole 210 for installing a bearing. The heating mechanism 100 is used to heat the inner hole 210, and is characterized in that: the heating mechanism 100 includes a support seat 10 and a plurality of conductive coils 20, the support seat 10 is cylindrical, all the conductive coils 20 are arranged around the outer periphery of the support seat 10, and all the conductive coils 20 are arranged at intervals along the axial direction of the support seat 10.

[0038] When using the heating mechanism 100, first place the heating mechanism 100 into the inner hole 210 of the bearing seat 200, then energize the conductive coil 20, and heat the inner hole 210 of the bearing seat 200 by electromagnetic heating, so that the inner hole 210 of the bearing seat 200 is expanded. Then, the heating mechanism 100 is taken out, and the bearing is placed into the inner hole 210 of the bearing seat 200. After the bearing seat 200 is cooled, the inner hole 210 of the bearing seat 200 shrinks and clamps the bearing, so that the interference fit between the bearing and the bearing seat 200 is achieved. Compared with the prior art, the heating mechanism 100 can greatly reduce the degree of damage to the bearing and the bearing seat 200, thereby increasing the service life of the bearing and the bearing seat 200 after assembly.

[0039] In another embodiment of the present application, all the conductive coils 20 are arranged at equal intervals along the axial direction of the support seat 10. In this way, the inner hole 210 of the bearing seat 200 can be heated evenly so that the deformation of each part of the inner hole 210 tends to be the same, which is beneficial to improve the smoothness of the bearing being installed into the bearing seat 200 and reduce the degree of damage to the bearing and the bearing seat 200.

[0040] In another embodiment of the present application, please refer to Figures 1 to 3 The heating mechanism 100 further includes at least one first guide block 30 connected to the support seat 10. When the number of the first guide blocks 30 is more than two, all the first guide blocks 30 are arranged at intervals along the circumference of the support seat 10, wherein in the radial direction of the support seat 10, the first guide blocks 30 protrude from the outer peripheral surface of the support seat 10 and the outer peripheral surface of the conductive coil 20. The first guide blocks 30 are used for guiding so that the axis of the heating mechanism 100 and the axis of the inner hole 210 of the bearing seat 200 tend to be collinear, so that the wall surface of the inner hole 210 of the bearing seat 200 is heated evenly, which is conducive to improving the smoothness of the bearing being installed into the bearing seat 200 and reducing the degree of damage to the bearing and the bearing seat 200.

[0041] In this embodiment, as an example, the number of the first guide blocks 30 is three, and the three first guide blocks 30 are arranged in a circumferential annular array along the support seat 10, so that the axis of the heating mechanism 100 and the axis of the inner hole 210 of the bearing seat 200 can be further made collinear.

[0042] In another embodiment of the present application, the heating mechanism 100 further includes a first fastener, a first threaded hole is provided on the support seat 10, a first through hole 31 is provided on the first guide block 30, and the first fastener penetrates the first through hole 31 and is threadedly connected with the first threaded hole. Specifically, the first threaded hole is provided on the upper surface of the support seat 10, the first through hole 31 is provided on the upper surface of the first guide block 30, and penetrates the lower surface of the first guide block 30 in the up-down direction. With such a configuration, the first guide block 30 can be detachably connected to the support seat 10, and the connection strength is high.

[0043] In another embodiment of the present application, please refer to Figure 4 The first through hole 31 is a waist-shaped hole, and the first through hole 31 extends along the radial direction of the support seat 10. Such a configuration makes the position of the first guide block 30 in the radial direction of the support seat 10 adjustable, so that the same heating mechanism 100 can be adapted to the bearing seat 200 with different inner holes 210, which is conducive to reducing production costs and greatly improving practicality.

[0044] In another embodiment of the present application, please refer to Figure 1 The heating mechanism 100 also includes at least one second guide block 40 connected to the support seat 10. When the number of the second guide blocks 40 is more than two, all the second guide blocks 40 are arranged at intervals along the circumference of the support seat 10, and the first guide block 30 and the second guide block 40 are respectively connected to the two sides of the support seat 10 in the axial direction, wherein, in the radial direction of the support seat 10, the surface of the first guide block 30 away from the support seat 10 is coplanar with the surface of the second guide block 40 away from the support seat 10.

[0045] Specifically, the first guide block 30 and the second guide block 40 are respectively connected to the upper and lower sides of the support seat 10. The common arrangement of the first guide block 30 and the second guide block 40 is conducive to making the axis of the heating mechanism 100 tend to be collinear with the axis of the inner hole 210 of the bearing seat 200. By configuring the surface of the first guide block 30 away from the support seat 10 to be coplanar with the surface of the second guide block 40 away from the support seat 10, it is further conducive to making the axis of the heating mechanism 100 tend to be collinear with the axis of the inner hole 210 of the bearing seat 200.

[0046] It will be understood that more than two includes two.

[0047] In another embodiment of the present application, a second fastener is further included, a second threaded hole is provided on the support seat 10, a second through hole is provided on the second guide block 40, and the second fastener penetrates the second through hole and is threadedly connected with the second threaded hole. Specifically, the second threaded hole is provided on the lower surface of the support seat 10, and the second through hole is provided on the upper surface of the second guide block 40, and penetrates the lower surface of the second guide block 40 in the up-down direction. In this way, the second guide block 40 can be detachably connected to the support seat 10, and the connection strength is high.

[0048] In another embodiment of the present application, the second through hole is a waist-shaped hole, and the second through hole extends along the radial direction of the support seat 10. Such a configuration makes the position of the second guide block 40 in the radial direction of the support seat 10 adjustable, so that the same heating mechanism 100 can be adapted to the bearing seat 200 with different inner holes 210, which is conducive to reducing production costs and greatly improving practicality.

[0049] In another embodiment of the present application, please refer to Figures 1 to 3 , further comprising a handle 50, which is disposed on one side of the support base 10 in the axial direction. Specifically, the handle 50 and the first guide block 30 are disposed on the same side of the support base 10, that is, the handle 50 is also disposed on the upper surface of the support base 10. The provision of the handle 50 can facilitate the carrying of the heating mechanism 100 by a carrying device.

[0050] In another embodiment of the present application, please refer to Figures 1 to 3 There are two handles 50, which are arranged in a circumferential annular array along the support seat 10. Such an arrangement can make the heating mechanism 100 evenly stressed, which is conducive to making the axis of the heating mechanism 100 and the axis of the inner hole 210 of the bearing seat 200 tend to be collinear.

[0051] The present application also provides a bearing assembly method using the above-mentioned heating mechanism 100, and the bearing assembly method comprises:

[0052] Provide a bearing seat 200, the bearing seat 200 has an inner hole 210 for mounting a bearing, and measure the diameter d of the inner hole 210 before being heated by the heating mechanism 100. 1 , and the temperature T of the inner hole 210 before being heated by the heating mechanism 100 1 ;

[0053] Based on the outer diameter of the bearing, the diameter d of the inner hole 210 after being heated by the heating mechanism 100 is obtained. 2 , d 2 With d 1 The difference is recorded as Δd;

[0054] Based on the formula: And the formula: ΔT=T 2 -T 1 , the diameter of the inner hole 210 is obtained as d 2 When the temperature of the inner hole 210 is 2 , where α is the expansion coefficient of the bearing seat 200 material, T 1 and T 2 The unit is ℃, d 1 and d 2 The unit is mm.

[0055] The heating mechanism 100 is placed into the inner hole 210 of the bearing seat 200, and the heating mechanism 100 is started until the temperature of the inner hole 210 rises to T 2 ;

[0056] Take out the heating mechanism 100 and place the bearing into the inner hole 210;

[0057] Cooling the bearing seat 200.

[0058] It should be noted that the thermal expansion coefficient includes linear expansion coefficient α, surface expansion coefficient β and volume expansion coefficient γ. For an object that can be approximately regarded as one-dimensional, the length is the determining factor for measuring its volume. At this time, the thermal expansion coefficient can be simply defined as: the ratio of the increase in length under unit temperature change to the original length, which is the linear expansion coefficient. For the bearing seat 200, only linear expansion needs to be considered, so the formula is constructed:

[0059] In the prior art, the bearing is pressed into the bearing seat 200 by a hydraulic press. In the present application, based on the thermal expansion and contraction of the bearing seat 200, the inner hole 210 of the bearing seat 200 is first heated by the heating mechanism 100. After the diameter of the inner hole 210 is expanded, the heating mechanism 100 is taken out and the bearing is placed in the inner hole 210. Finally, after the bearing seat 200 is cooled, the inner hole 210 shrinks and clamps the bearing, thereby achieving an interference fit between the bearing and the bearing seat 200. This bearing assembly method can greatly reduce the degree of damage to the bearing and the bearing seat 200, thereby increasing the service life of the bearing and the bearing seat 200 after assembly.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A heating mechanism, applied to a bearing seat (200), wherein the bearing seat (200) has an inner hole (210) for mounting a bearing, and the heating mechanism (100) is used to heat the inner hole (210), characterized in that: The heating mechanism (100) comprises a support seat (10) and a plurality of conductive coils (20); the support seat (10) is cylindrical; all of the conductive coils (20) are arranged around the outer circumference of the support seat (10); and all of the conductive coils (20) are arranged at intervals along the axial direction of the support seat (10).

2. The heating mechanism according to claim 1, characterized in that: It also includes at least one first guide block (30) connected to the support seat (10); when the number of the first guide blocks (30) is more than two, all the first guide blocks (30) are arranged at intervals along the circumference of the support seat (10); Wherein, in the radial direction of the support seat (10), the first guide block (30) protrudes from the outer peripheral surface of the support seat (10) and from the outer peripheral surface of the conductive coil (20).

3. The heating mechanism according to claim 2, characterized in that: It also includes a first fastener, a first threaded hole is provided on the support seat (10), a first through hole (31) is provided on the first guide block (30), and the first fastener passes through the first through hole (31) and is threadedly connected to the first threaded hole.

4. The heating mechanism according to claim 3, characterized in that: The first through hole (31) is a waist-shaped hole, and the first through hole (31) extends along the radial direction of the support seat (10).

5. The heating mechanism according to claim 2, characterized in that: It also includes at least one second guide block (40) connected to the support seat (10); when the number of the second guide blocks (40) is more than two, all of the second guide blocks (40) are arranged at intervals along the circumference of the support seat (10); and the first guide block (30) and the second guide block (40) are respectively connected to two sides of the support seat (10) in the axial direction; Wherein, in the radial direction of the support seat (10), the surface of the first guide block (30) away from the support seat (10) and the surface of the second guide block (40) away from the support seat (10) are coplanar.

6. The heating mechanism according to claim 5, characterized in that: It also includes a second fastener, the support seat (10) is provided with a second threaded hole, the second guide block (40) is provided with a second through hole, and the second fastener penetrates the second through hole and is threadedly connected to the second threaded hole.

7. The heating mechanism according to claim 6, characterized in that: The second through hole is a waist-shaped hole, and the second through hole extends along the radial direction of the support seat (10).

8. The heating mechanism according to claim 1, characterized in that: It also includes a handle (50), and the handle (50) is arranged on one side of the support seat (10) in the axial direction.

9. The heating mechanism according to claim 8, characterized in that: Two handles (50) are provided, and the two handles (50) are arranged in a circumferential annular array along the support seat (10).

10. A bearing assembly method using the heating mechanism according to any one of claims 1 to 9, characterized in that: The bearing assembly method comprises: Providing a bearing seat (200), the bearing seat (200) having an inner hole (210) for mounting a bearing, measuring a diameter d1 of the inner hole (210) before being heated by the heating mechanism (100), and measuring a temperature T1 of the inner hole (210) before being heated by the heating mechanism (100); Based on the outer diameter of the bearing, a diameter d2 of the inner hole (210) after being heated by the heating mechanism (100) is obtained, and the difference between d2 and d1 is recorded as Δd; Based on the formula: And the formula: ΔT=T2-T1, when the diameter of the inner hole (210) is d2, the temperature T2 of the inner hole (210) is obtained, wherein α is the expansion coefficient of the bearing seat (200) material, the unit of T1 and T2 is ° C, and the unit of d1 and d2 is mm. The heating mechanism (100) is placed into the inner hole (210) of the bearing seat (200), and the heating mechanism (100) is started until the temperature of the inner hole (210) rises to T2; Taking out the heating mechanism (100), and placing the bearing into the inner hole (210); The bearing seat (200) is cooled.

Images