Disassembling tool and disassembling method

Abstract

The invention belongs to the field of bearing dismounting, and particularly relates to a dismounting tool and a dismounting method. Comprising an expansion module, an opening module, a screw-in module and an impact module. The expansion module comprises a fixing part and a plurality of expansion parts; a first through hole is formed in the fixing part; the expansion parts are circumferentially and uniformly arranged on the fixed part at intervals along the central axis of the first through hole; the expansion part comprises first conical surfaces, and the first conical surfaces are combined to form a conical extrusion space; the round surface of the extrusion space is gradually reduced along the central axis of the first through hole close to the first through hole; the expanding module is a rotating body, and the diameter of the rotating body is larger than that of the minimum circular face of the extrusion space. The screw-in module is in threaded connection with the fixing part; one end of the screw-in module penetrates through the first through hole to be located in the extrusion space and is detachably connected with the opening module, and the impact module is movably connected with the screw-in module. In this way, the problem existing in the process of disassembling the deep groove ball bearing in the shell in the prior art is solved.

Description

Technical Field

[0001] The present invention belongs to the field of bearing disassembly, and specifically relates to a disassembly tool and a disassembly method Background Art

[0002] The support and limit method of the transmission part (rudder shaft) of the electric servo mechanism is mostly achieved by embedding deep groove ball bearings in the housing. During the development of deep groove ball bearing models, it is necessary to repeatedly embed the deep groove ball bearings in the housing and then take them out to find the best deep groove ball bearing that can fit the housing. Currently, the existing methods of removing deep groove ball bearings from the housing are mostly to clamp them out with pliers or pry them out with a screwdriver. Since the clearance fit tolerance between the outer ring of this deep groove ball bearing and the housing is usually small, and the exposed area and operable space of the inner and outer rings are small, the existing methods are prone to axial tilt and collision with the bearing when removing the bearing, causing damage to the bearing. Summary of the invention

[0003] In order to solve the above problems existing in the prior art of disassembling deep groove ball bearings in a housing, the present invention provides a disassembly tool and a disassembly method:

[0004] In a first aspect, this embodiment provides a disassembly tool, including:

[0005] An expansion module, a spreading module, a screw-in module, and an impact module; the expansion module includes a fixed portion and a plurality of expansion portions; the fixed portion is provided with a first through-hole; the expansion portions are evenly spaced along the circumference of the center axis of the first through-hole on the fixed portion; the expansion portion includes a first conical surface, and the first conical surfaces are combined to form a conical extrusion space; the circular surface of the extrusion space gradually decreases along the center axis of the first through-hole approaching the first through-hole; the spreading module is a rotating body, and the diameter of the rotating body is larger than the diameter of the smallest circular surface of the extrusion space; the screw-in module is threadedly connected to the fixed portion; one end of the screw-in module passes through the first through-hole and is located in the extrusion space, and is detachably connected to the spreading module, and the impact module is movably connected to the screw-in module.

[0006] In some embodiments, the expansion portion includes an expansion surface, and the expansion surface is opposite to the first conical surface; the distance between any point on the expansion surface and the central axis of the first through hole is equal.

[0007] In some embodiments, the expansion portion further includes a plurality of protrusions, and the protrusions are evenly arranged on the expansion surface.

[0008] In some embodiments, the expansion portion includes an expansion surface, which is opposite to the first conical surface; the expansion surface is a conical surface, which gradually increases from one end of the expansion portion toward the fixing portion along the central axis of the first through hole; the taper of the expansion surface is equal to the taper of the first conical surface.

[0009] In some embodiments, the rotating body is a cone, and the outer surface of the cone is a second cone surface; the smallest circular surface end of the cone is detachably connected to the screw-in module.

[0010] In some embodiments, the second tapered surface has the same taper as the first tapered surface.

[0011] In some embodiments, the rotating body is a sphere, and the detachable connection between the sphere and the screw-in module is located on the great circle of the sphere.

[0012] In some embodiments, the screw-in module includes a screw, a nut, and a blocking plate; one end of the screw passes through the first through hole and is located in the extrusion space, and is detachably connected to the rotating body; the other end is detachably connected to the blocking plate; the impact module includes an impact part and a second through hole; the second through hole passes through the impact part; the diameter of the second through hole is larger than the diameter of the screw; the impact part is movably connected to the screw through the second through hole, and the nut is threadedly connected to the screw; the nut is located between the impact module and the fixed part.

[0013] In some embodiments, the impact portion includes an impact section and a gripping section; the impact section is close to the blocking plate; and a plurality of anti-slip protrusions are evenly arranged on the outer peripheral surface of the gripping section.

[0014] In a second aspect, this embodiment provides a disassembly method, which is applied to the disassembly tooling described in the first aspect, and includes the following steps:

[0015] S11: Rotate the screw-in module;

[0016] S12: the expansion module moves toward the fixing portion, the expansion module presses the first conical surface of the expansion portion, and the expansion portion expands;

[0017] S13: When the expansion portion stops expanding, the impact module is used to impact the screw-in module along the central axis direction of the first perforation.

[0018] In order to solve the above-mentioned problems existing in the prior art of disassembling the deep groove ball bearing in the housing, the present invention has the following advantages:

[0019] By rotating the screw-in module away from the expansion module, the stretching module moves toward the fixed portion and squeezes the first conical surface of the expansion portion, so that the expansion portion expands evenly and contacts the inner ring of the bearing evenly. When the expansion portion stops expanding, the outer surface of the expansion portion is locked with the inner ring of the bearing. The impact module is used to impact the screw-in module along the axis of the first perforation, so that the bearing can be removed from the shell. This method is not easy to cause axial tilt of the bearing when taking out the bearing, and because the outer surface of the expansion portion has an interference fit with the inner ring of the bearing, the expansion portion will not collide with the bearing when taking out the bearing from the shell, causing damage to the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of a disassembly tool;

[0021] Figure 2 for Figure 1 Sectional view along the AA direction;

[0022] Figure 3 for Figure 1 Explosion diagram of

[0023] Figure 4 It is a schematic structural diagram of some embodiments of a disassembly tool.

[0024] In the figure: 10, expansion module; 11, fixing part; 12, expansion part; 121, expansion surface; 122, first conical surface; 123, protrusion; 20, expansion module; 21, second conical surface; 30, screw-in module; 31, screw-in rod; 32, blocking plate; 33, nut; 40, impact module; 41, impact part; 411, gripping section; 412, impact section; 41, anti-slip protrusion; 42, second through hole. DETAILED DESCRIPTION

[0025] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0026] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like is based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate an orientation or position relationship, some of the above terms may also be used to indicate other meanings, such as the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances. In addition, the terms "install", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0027] This embodiment discloses a disassembly tool, such as Figure 1 , Figure 2 , Figure 3 As shown, it may include:

[0028] An expansion module, a spreading module, a screw-in module, and an impact module; the expansion module includes a fixed portion and a plurality of expansion portions; the fixed portion is provided with a first through-hole; the expansion portions are evenly spaced along the circumference of the center axis of the first through-hole on the fixed portion; the expansion portion includes a first conical surface, and the first conical surfaces are combined to form a conical extrusion space; the circular surface of the extrusion space gradually decreases along the center axis of the first through-hole approaching the first through-hole; the spreading module is a rotating body, and the diameter of the rotating body is larger than the diameter of the smallest circular surface of the extrusion space; the screw-in module is threadedly connected to the fixed portion; one end of the screw-in module passes through the first through-hole and is located in the extrusion space, and is detachably connected to the spreading module, and the impact module is movably connected to the screw-in module.

[0029] In this embodiment, the expansion part is first placed in the inner ring of the bearing in the shell, and the expansion part is expanded by setting the extrusion space to be conical and squeezing the first conical surface of the expansion part through the expansion module, so that the expansion part can be interference fit with the inner ring of the bearing, and the screw-in module is threadedly connected with the fixing part. The threaded connection can ensure that the expansion part will not be squeezed out of the extrusion space due to the reverse force of the expansion force on the expansion part during the screw-in process, resulting in the expansion part and the inner ring of the bearing being separated. In addition, the expansion module is set as a rotating body, and the maximum diameter of the rotating body is greater than the minimum circular surface diameter of the extrusion space, so that it can be ensured that the expansion module can apply an extrusion force to the first conical surface of the expansion part, so that the expansion part can expand to all sides and have an interference fit with the inner ring of the bearing.

[0030] In some embodiments, Figure 1 , Figure 2 As shown, the expansion portion 12 includes an expansion surface 121, and the expansion surface 121 is opposite to the first conical surface 122; the distance between any point on the expansion surface 121 and the central axis of the first through hole is equal.

[0031] In this embodiment, any point on the expansion surface 121 is set to be at an equal distance from the center axis of the first perforation, so that when the expansion module 20 is in a state of non-extrusion expansion portion 12, the expansion surface 121 is a cylindrical surface, so that when the expansion portion 12 is squeezed by the expansion module 20, the expansion surface 121 can be in uniform contact with the inner ring of the bearing, so that the force on the inner ring of the bearing is more uniform, avoiding the situation where the inner ring of the bearing is squeezed and cracks are generated due to uneven force.

[0032] In some embodiments, Figure 3 As shown, the expansion portion 12 further includes a plurality of protrusions 123 , and the protrusions 123 are evenly arranged on the expansion surface 121 .

[0033] In this embodiment, a plurality of protrusions 123 are provided on the expansion surface 121, and the protrusions 123 are a soft rubber structure. During the expansion of the expansion portion 12, the protrusions 123 can increase the friction between the expansion portion 12 and the inner ring of the bearing. At the same time, since the protrusions 123 are made of rubber, while making the expansion portion 12 and the inner ring of the bearing locked more firmly, it can also prevent the inner ring of the bearing from expanding outward due to excessive pressure, resulting in non-compliance with the bearing, thereby protecting the bearing.

[0034] In some embodiments, Figure 4 As shown, the expansion portion 12 includes an expansion surface 121, and the expansion surface 121 is opposite to the first conical surface 122; the expansion surface 121 is a conical surface, and the expansion surface 121 gradually increases from one end of the expansion portion 12 toward the fixing portion 11 along the central axis of the first through hole; the taper of the expansion surface 121 is equal to the taper of the first conical surface 122.

[0035] In this embodiment, by setting the expansion surface 121 as a conical surface, and the taper of the expansion surface 121 is equal to the taper of the first conical surface 122, when the expansion module 20 squeezes the inner surface of the expansion portion 12, the expansion portion 12 has the largest expansion amplitude at the end away from the fixed portion 11. Therefore, the expansion surface 121 is set to a cone. When the end of the expansion portion 12 away from the fixed portion 11 abuts against the inner ring of the bearing, the expansion distance of this end also becomes larger accordingly. In this way, the contact area between the expansion surface 121 and the inner ring of the bearing can be increased, thereby increasing the friction force, which is more conducive to removing the bearing from the housing without causing damage to the bearing, and can also speed up the removal efficiency of the bearing.

[0036] In some embodiments, Figure 1 , Figure 2 As shown, the rotating body is a cone, and the outer surface of the cone is a second cone surface 21; the smallest circular surface end of the cone is detachably connected to the screw-in module 30.

[0037] In this embodiment, the rotating body is set as a cone, and the outer surface of the cone is the second conical surface 21; the smallest circular surface end of the cone is detachably connected to the screw-in module 30, and the second conical surface 21 is in circular contact with the first conical surface 122, so that when the expansion part 12 is squeezed, its expansion is more uniform, and the expansion surface 121 of the expansion part 12 is in better contact with the bearing, and it is more secure after interference fit.

[0038] In some embodiments, Figure 1 , Figure 2 As shown, the second conical surface 21 and the first conical surface 122 have the same taper.

[0039] In this embodiment, by setting the taper of the second conical surface 21 to be equal to that of the first conical surface 122, the second conical surface 21 of the expansion module 20 can fit more firmly with the first conical surface 122 during the screwing process, so that when the expansion portion 12 is squeezed by the inner ring of the bearing, the pressure resistance is better, ensuring that the bearing can be smoothly removed from the housing.

[0040] In some embodiments, the rotating body is a sphere, and the detachable connection between the sphere and the screw-in module 30 is located on the great circle of the sphere.

[0041] In this embodiment, the rotating body is a sphere. Since the sphere has good pressure resistance, it is not easy to deform when being squeezed by the expansion portion 12, thereby ensuring that the bearing can be smoothly taken out of the housing.

[0042] In some embodiments, Figure 1 , Figure 2 , Figure 3 As shown, the screw-in module 30 includes a screw, a nut 33, and a blocking plate 32; one end of the screw passes through the first through hole and is located in the extrusion space, and is detachably connected to the rotating body; the other end is detachably connected to the blocking plate 32; the impact module 40 includes an impact portion 41 and a second through hole 42; the second through hole 42 passes through the impact portion 41; the diameter of the second through hole 42 is larger than the diameter of the screw; the impact portion 41 is movably connected to the screw through the second through hole 42, and the nut 33 is threadedly connected to the screw; the nut 33 is located between the impact module 40 and the fixing portion 11.

[0043] In this embodiment, the detachable connection between the screw and the rotating body can be a threaded connection, and when the nut 33 is threadedly connected to the screw, the rotation direction is the same as the rotation direction when the screw is threadedly connected to the rotating body. This is to prevent the connection between the screw and the rotating body from loosening when the nut 33 is twisted. In this embodiment, when the nut 33 rotates, it can contact the fixed part 11, so that the blocking plate 32 can move away from the fixed part 11 along the central axis of the first through hole, so that the rotating body can squeeze the first cone surface 122 and expand the expansion part 12. In this embodiment, a second through hole 42 is penetrated on the impact part 41, and the screw can penetrate into the second through hole 42. By sliding the impact module 40 to hit the blocking plate 32, the screw can pull the rotating body to squeeze the first cone surface 122 and expand the expansion part 12.

[0044] In some embodiments, the impact portion 41 includes an impact section 412 and a gripping section 411 ; the impact section 412 is close to the blocking plate 32 ; and a plurality of anti-slip protrusions 123 are evenly arranged on the outer peripheral surface of the gripping section 411 .

[0045] In this embodiment, by providing an anti-slip protrusion 123 on the gripping section 411, the anti-slip protrusion 123 can prevent the hand from slipping off the impact portion 41 due to inertia when the hand impact section 412 impacts the blocking plate 32, causing the hand to hit the blocking plate 32 and cause injury.

[0046] This embodiment provides a disassembly method, comprising the following steps:

[0047] S11: Rotate the screw-in module 30;

[0048] S12: the expansion module 20 moves closer to the fixing portion 11, the expansion module 20 presses the first conical surface 122 of the expansion portion 12, and the expansion portion 12 expands;

[0049] S13: When the expansion portion 12 stops expanding, the impact module 40 is used to impact the screw-in module 30 along the central axis direction of the first perforation.

[0050] In this embodiment, the expansion portion 12 is first inserted into the inner ring of the bearing, and then the nut 33 in the screw-in module 30 is rotated. The nut 33 rotates and applies force to the fixing portion 11, so that the expansion module 20 can move close to the fixing portion 11. The expansion module 20 squeezes the first conical surface 122 of the expansion portion 12, and the expansion portion 12 expands; when the expansion surface 121 of the expansion portion 12 is interference fit with the inner ring of the bearing, the expansion portion 12 stops expanding, and the impact module 40 is used to impact the blocking plate 32 in the screw-in module 30 along the center axis direction of the first perforation, so that the bearing is pulled out of the housing.

[0051] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present disclosure, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present disclosure.

Claims

1. A disassembly tool, characterized in that: The disassembly tool comprises: An expansion module, a spreading module, a screw-in module, and an impact module; the expansion module includes a fixed portion and a plurality of expansion portions; the fixed portion is provided with a first through-hole; the expansion portions are evenly spaced along the circumference of the center axis of the first through-hole on the fixed portion; the expansion portion includes a first conical surface, and the first conical surfaces are combined to form a conical extrusion space; the circular surface of the extrusion space gradually decreases along the center axis of the first through-hole approaching the first through-hole; the spreading module is a rotating body, and the diameter of the rotating body is larger than the diameter of the smallest circular surface of the extrusion space; the screw-in module is threadedly connected to the fixed portion; one end of the screw-in module passes through the first through-hole and is located in the extrusion space, and is detachably connected to the spreading module, and the impact module is movably connected to the screw-in module.

2. A disassembly tool according to claim 1, characterized in that: The expansion portion includes an expansion surface, and the expansion surface is opposite to the first conical surface; any point on the expansion surface is equidistant from the center axis of the first through hole.

3. A disassembly tool according to claim 2, characterized in that: The expansion portion further includes a plurality of protrusions, and the protrusions are evenly arranged on the expansion surface.

4. A disassembly tool according to claim 1, characterized in that: The expansion portion includes an expansion surface, which is opposite to the first conical surface; the expansion surface is a conical surface, which gradually increases from one end of the expansion portion toward the fixing portion along the central axis of the first through hole; the taper of the expansion surface is equal to the taper of the first conical surface.

5. A disassembly tool according to claim 2, characterized in that: The rotating body is a cone, and the outer surface of the cone is a second cone surface; the smallest circular surface end of the cone is detachably connected to the screw-in module.

6. A disassembly tool according to claim 5, characterized in that: The second conical surface has the same taper as the first conical surface.

7. A disassembly tool according to claim 2, characterized in that: The rotating body is a sphere, and the detachable connection between the sphere and the screw-in module is located on the large circle of the sphere.

8. The disassembly tool according to claim 1, characterized in that: The screw-in module includes a screw, a nut, and a blocking plate; one end of the screw passes through the first through hole and is located in the extrusion space, and is detachably connected to the rotating body; the other end is detachably connected to the blocking plate; the impact module includes an impact part and a second through hole; the second through hole passes through the impact part; the diameter of the second through hole is larger than the diameter of the screw; the impact part is movably connected to the screw through the second through hole, and the nut is threadedly connected to the screw; the nut is located between the impact module and the fixed part.

9. A disassembly tool according to claim 8, characterized in that: The impact portion comprises an impact section and a gripping section; the impact section is close to the blocking plate; and a plurality of anti-slip protrusions are evenly arranged on the outer peripheral surface of the gripping section.

10. A disassembly method, said method being applied to the disassembly tool according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: S11: Rotate the screw-in module; S12: the expansion module moves toward the fixing portion, the expansion module presses the first conical surface of the expansion portion, and the expansion portion expands; S13: When the expansion portion stops expanding, the impact module is used to impact the screw-in module along the central axis direction of the first perforation.

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