Bushing mechanism convenient to disassemble

Abstract

The utility model relates to the technical field of bush disassembly, in particular to a bush mechanism convenient to disassemble, which comprises an outer cylinder sleeve and an inner bush, the outer cylinder sleeve is arranged outside the inner bush in a sleeving manner, at least part of the outer cylinder sleeve is attached to the inner bush, the inner bush is connected with a disassembly assisting assembly, and the disassembly assisting assembly is connected with the outer cylinder sleeve. At least part of the disassembly assisting assembly is in contact with the upper edge of the neck bush, the disassembly tool applies force to the disassembly assisting assembly, the disassembly assisting assembly and the neck bush are separated from the outer cylinder sleeve together, the disassembly assisting assembly comprises two disassembly sleeves, the peripheral wall of each disassembly sleeve is provided with a first arc-shaped protrusion, and at least part of the lower edge of each first arc-shaped protrusion is attached to the upper edge of the neck bush; the compression area of the neck bush is increased due to the arrangement of the disassembly assisting assembly, the neck bush is stressed more evenly, disassembly is more convenient, and the neck bush cannot be damaged due to the fact that the disassembly tool does not make contact with the neck bush.

Description

Technical Field

[0001] The present disclosure relates to the technical field of bushing disassembly, and in particular to a bushing mechanism that is easy to disassemble. Background Art

[0002] The rock drill is equipped with a rock drill bit for drilling holes in the rock wall, and the rock drill bit is installed in a bushing mechanism. The bushing mechanism often includes an outer cylinder sleeve and an inner sleeve. The outer cylinder sleeve is arranged outside the inner sleeve, and the rock drill bit is installed in the inner sleeve and fits with the inner sleeve. The inner sleeve separates the rock drill bit from the outer cylinder sleeve to prevent the outer cylinder sleeve from being worn.

[0003] The inner bushing is a thin-walled rotating workpiece that is used in a large number of press-fitting technologies in the machinery industry. It is non-detachable or detachable, has a simple structure, good centering with the hub hole, high load-bearing capacity, and reliable operation under vibration. During the use of the bushing mechanism, the inner bushing will be worn over time. After the inner bushing is worn, the gap S (such as Figure 1 and Figure 2 The inner sleeve is very small, sometimes even almost zero, which makes it very inconvenient to remove the inner sleeve. In addition, the inner sleeve and the outer cylinder sleeve are interference fit. When the interference fit occurs, the expansion deformation of the outer cylinder body and the compression deformation of the inner sleeve occur simultaneously, which generates a large radial pressure between the surfaces of the mating parts, making the removal of the inner sleeve more cumbersome.

[0004] For the removal of the above-mentioned inner bushing, the prior art often uses the following three removal methods: (1) destructive removal. This method is easy to remove soft materials such as copper, but it is difficult to remove hard materials such as steel. It can only be removed by machining. However, both copper and steel will destroy the structure of the inner bushing, resulting in the removal of the inner bushing. (2) Using a cone-type tool to knock on the edge of the inner bushing for removal. Since the gap S between the inner bushing and the outer cylinder sleeve is small, the force on a single point is uneven. When knocking, the center of the inner bushing will be offset and the surface will be damaged. The removed inner bushing can no longer be used. (3) Using an ordinary shaft for removal. Although this method solves the problem of uneven force, it is not possible to remove the inner bushing when the S size is close to 0. Therefore, it is urgent to develop a bushing mechanism that makes it easy to remove the inner bushing. Utility Model Content

[0005] In view of the deficiencies or problems existing in the prior art, the present invention provides a bushing mechanism that is easy to disassemble, in which the inner bushing can be disassembled more conveniently without causing damage to the inner bushing.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a bushing mechanism that is easy to disassemble, including an outer cylinder sleeve and an inner sleeve, the outer cylinder sleeve is arranged on the outside of the inner sleeve, the outer cylinder sleeve is at least partially in contact with the inner sleeve, the inner sleeve is connected with a disassembly-aiding component, the disassembly-aiding component is at least partially in contact with the upper edge of the inner sleeve, the disassembly tool applies force to the disassembly-aiding component, and the disassembly-aiding component and the inner sleeve are removed from the outer cylinder sleeve together.

[0007] As a preferred embodiment, the disassembly aid assembly includes two disassembly sleeves, the outer peripheral wall of the disassembly sleeve is provided with a first arc-shaped protrusion, and the lower edge of the first arc-shaped protrusion at least partially fits with the upper edge of the inner liner sleeve.

[0008] As a preferred embodiment, the inner sleeve is in a "convex" shape, comprising a first part and a second part, wherein the first part is located above the second part, the wall thickness of the first part is smaller than the wall thickness of the second part, and the width of the first arc-shaped protrusion is less than or equal to the wall thickness of the first part.

[0009] As a preferred embodiment, the outer peripheral wall of the disassembly sleeve is further provided with a first arc-shaped recess, and the first arc-shaped recess is arranged below the first arc-shaped protrusion.

[0010] As a preferred embodiment, the disassembly sleeve is provided with an opening, and after the disassembly aid assembly is connected to the inner liner sleeve, the openings of the two disassembly sleeves are arranged opposite to each other.

[0011] As a preferred embodiment, the disassembly tool includes a head and a tail, the tail including a first end close to the head and a second end away from the head, when the inner sleeve is removed, the head is located in the opening and contacts the inner wall of the opening, and the end face of the first end is located on the disassembly sleeve and contacts the upper end face of the disassembly sleeve.

[0012] As a preferred embodiment, the inner side of the opening of the disassembly sleeve is a conical surface, and the head is a frustum structure, and the frustum structure is adapted to the conical surface.

[0013] As a preferred embodiment, the inner wall of the outer cylinder sleeve is provided with a first annular recess and a second annular recess, the second annular recess is located below the first annular recess, and the upper edge of the inner sleeve is located at the second annular recess.

[0014] As a preferred embodiment, the first connecting surface and the second connecting surface are respectively connected on both sides of the second annular recess, the first connecting surface is arranged close to the first annular recess, the distance from the first connecting surface to the outer peripheral wall of the outer cylinder sleeve is greater than the distance from the second connecting surface to the outer peripheral wall of the outer cylinder sleeve, and the fitting point between the first arc-shaped protrusion and the upper edge of the inner sleeve is located between the first connecting surface and the second connecting surface.

[0015] As a preferred embodiment, it further comprises a support sleeve, the inner wall of the support sleeve is provided with an annular recess, the outer cylinder sleeve is located in the annular recess, and the support sleeve is used to support the outer cylinder sleeve.

[0016] As a preferred embodiment, the disassembly sleeve includes a middle part and two end parts, the two end parts are respectively located at the two ends of the middle part, the outer peripheral wall of the middle part is a curved surface, the outer peripheral wall of the end parts is a flat surface, and the thickness of the end parts is less than the thickness of the middle part.

[0017] Compared with existing products, since the inner sleeve is connected with a disassembly-assisting assembly, the disassembly-assisting assembly at least partially contacts with the upper edge of the inner sleeve, and the disassembly tool applies force to the disassembly-assisting assembly, the disassembly-assisting assembly and the inner sleeve are removed from the outer cylinder sleeve together. The provision of the disassembly-assisting assembly increases the pressure area of ​​the inner sleeve, making the force on the inner sleeve more uniform and the disassembly more convenient. Since the disassembly tool does not contact the inner sleeve, the inner sleeve will not be damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present application will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present application. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0019] Figure 1 It is a structural schematic diagram of a bushing mechanism in the prior art of the present disclosure;

[0020] Figure 2 This disclosure Figure 1 A partial enlarged view of the middle A;

[0021] Figure 3 It is a structural schematic diagram of a bushing mechanism that is easy to disassemble disclosed in the present invention;

[0022] Figure 4 This disclosure Figure 3 A partial enlarged view of point B in the middle;

[0023] Figure 5 is a schematic diagram of the structure of the disassembly aid assembly disclosed in the present invention;

[0024] Figure 6 is a schematic diagram of the structure of the disassembly sleeve disclosed in the present invention;

[0025] Figure 7 is a cross-sectional view of the disassembly aid assembly disclosed herein;

[0026] Figure 8 It is a structural schematic diagram of the disassembly tool disclosed in the present invention.

[0027] Description of reference numerals:

[0028] 1. Outer cylinder sleeve; 2. Inner liner; 3. Support sleeve; 4. Disassembly tool; 5. Disassembly aid assembly; 6. First annular recess; 7. Second annular recess; 8. First arc-shaped protrusion; 9. First arc-shaped recess; 10. First connecting surface; 11. Opening; 12. Conical surface; 13. Middle part; 14. End part; 15. Head part; 16. Tail part; 17. Disassembly sleeve. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the present disclosure is described in detail, clearly and completely in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not used to limit the present disclosure.

[0030] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0031] Please see Figure 3 As shown, an embodiment of the present disclosure provides a bushing mechanism that is easy to disassemble, including an outer cylinder sleeve 1 and an inner sleeve 2, wherein the outer cylinder sleeve 1 is sleeved on the outside of the inner sleeve 2, the outer cylinder sleeve 1 and the inner sleeve 2 are interference fit, the inner peripheral wall of the outer cylinder sleeve 1 at least partially fits with the inner sleeve 2, and the inner sleeve 2 is connected with a disassembly-assisting component 5, the upper end of the disassembly-assisting component 5 contacts the upper edge of the inner sleeve 2, and the disassembly tool 4 applies force to the disassembly-assisting component 5, so that the disassembly-assisting component 5 and the inner sleeve 2 are removed from the outer cylinder sleeve 1 together. In this way, the inner sleeve 2 can be disassembled quickly and conveniently, and since the disassembly tool 4 does not directly contact the inner sleeve 2, the inner sleeve 2 will not be damaged, and the inner sleeve 2 can continue to be used.

[0032] For further information, please also refer to Figure 5 and Figure 6As shown, the disassembly aid component 5 includes two "C"-shaped disassembly sleeves 17, and the outer peripheral wall of the disassembly sleeve 17 is provided with a first arc-shaped protrusion 8, and the lower edge of the first arc-shaped protrusion 8 is in contact with the upper edge of the inner sleeve 2, that is, the first arc-shaped protrusion 8 overlaps the upper edge of the inner sleeve 2. The inner sleeve 2 is a "convex"-shaped structure, and the inner sleeve 2 includes a first part and a second part. The first part is located above the second part, and the wall thickness of the first part is less than the wall thickness of the second part. The width of the first arc-shaped protrusion 8 is less than or equal to the wall thickness of the first part, so that the first arc-shaped protrusion 8 will not enter the second annular recess 7. The disassembly sleeve 17 is provided with an opening 11. After the disassembly aid component 5 is connected to the inner sleeve 2, the openings 11 of the two disassembly sleeves 17 are arranged opposite to each other.

[0033] like Figure 3 , Figure 6 and Figure 8 As shown, the disassembly tool 4 in the present disclosure is preferably an impact head, which includes a head 15 and a tail 16. The size of the tail 16 is larger than that of the head 15. The size of the tail 16 should be larger than the size of the space enclosed by the two disassembly sleeves 17 and smaller than the inner diameter of the inner liner 2. During disassembly, a force is applied to the tail 16. The end of the tail 16 connected to the head 15 is the first end, and the end away from the head 15 is the second end. When the inner sleeve 2 needs to be removed, the disassembly aid component 5 is installed on the inner sleeve 2, and the head 15 of the impact head is inserted into the opening 11 of the two disassembly sleeves 17 (the head 15 of the impact head is located in the space enclosed by the two disassembly sleeves 17), and the outer peripheral wall of the head 15 of the impact head fits with the inner wall of the opening 11, and a circumferential force is applied to the two disassembly sleeves 17, and the two disassembly sleeves 17 are pushed to both sides respectively, so that the outer peripheral wall of the disassembly sleeve 17 fits tightly with the outer peripheral wall of the inner sleeve 2. At this time, the contact area between the upper edge of the inner sleeve 2 and the lower edge of the first arc-shaped protrusion 8 is increased, and the end face of the first end of the tail 16 fits with the end faces of the upper ends of the two disassembly sleeves 17, and a force is applied from the second end to the first end at the second end of the tail 16, so that the inner sleeve 2 and the disassembly aid component 5 can be conveniently removed from the outer cylinder sleeve 1 together. The disassembly sleeve 17 is connected to the inner sleeve 2, which increases the stress area of ​​the inner sleeve 2 during disassembly, and makes the stress of the inner sleeve 2 more uniform. Since the local compressive stress is smaller, the inner sleeve 2 will not be damaged. Preferably, the outer peripheral wall of the disassembly sleeve 17 is also provided with a first arc-shaped concave 9, and the first arc-shaped concave 9 is arranged below the first arc-shaped protrusion 8. The arrangement of the first arc-shaped concave 9 leaves a gap between the inner sleeve 2 and the inner sleeve 2, so that the first arc-shaped protrusion 8 can overlap the upper end of the inner sleeve 2.

[0034] Please see Figure 3 and Figure 4As shown, the inner wall of the outer cylinder sleeve 1 is provided with a first annular concave 6 and a second annular concave 7, the second annular concave 7 is located below the first annular concave 6, and the upper edge of the inner sleeve 2 is located at the second annular concave 7. The first connecting surface 10 and the second connecting surface are connected to the two sides of the second annular concave 7 respectively, the first connecting surface 10 is arranged close to the first annular concave 6, the distance from the first connecting surface 10 to the outer peripheral wall of the outer cylinder sleeve 1 is greater than the distance from the second connecting surface to the outer peripheral wall of the outer cylinder sleeve 1, and the fitting part of the first arc-shaped protrusion 8 and the upper edge of the inner sleeve 2 is located between the first connecting surface 10 and the second connecting surface, that is, a gap is provided between the outer end surface of the first arc-shaped protrusion 8 and the second connecting surface, so that when disassembling, the outer end surface of the first arc-shaped protrusion 8 and the second connecting surface will not contact, and no friction will be generated between the two, so that the disassembly of the inner sleeve 2 can be completed conveniently.

[0035] In particular, such as Figure 7 and Figure 8 As shown, the head 15 of the impact head can be a columnar structure or a truncated cone structure, preferably a truncated cone structure with a larger top and a smaller bottom. The inner side of the opening 11 of the disassembly sleeve 17 is a conical surface 12, and the conical surface 12 is adapted to the truncated cone structure. This arrangement makes it easier for the impact head to enter the disassembly assembly, and on the other hand, it makes the head 15 of the impact head fit better with the disassembly sleeve 17 to ensure uniform force.

[0036] Further, such as Figure 6 As shown, the disassembly sleeve 17 includes a middle portion 13 and two end portions 14, the two end portions 14 are respectively located at the two ends of the middle portion 13, the outer peripheral wall of the middle portion 13 is a curved surface, the outer peripheral wall of the end portions 14 is a flat surface, and the thickness of the end portions 14 is less than the thickness of the middle portion 13. Such a configuration prevents the two end portions 14 from contacting the inner peripheral wall of the inner bushing 2, reduces friction, and enables the disassembly sleeve 17 to smoothly enter the inner bushing 2.

[0037] Please continue to see Figure 3 As shown, in one embodiment of the present disclosure, a hollow support sleeve 3 is also included. The support sleeve 3 has a certain height. The inner wall of the support sleeve 3 is provided with an annular depression. The outer cylinder sleeve 1 is located in the annular depression. The support sleeve 3 is used to support the outer cylinder sleeve 1. The support sleeve 3 is provided to facilitate the removal of the inner sleeve 2. The inner sleeve 2 will fall downward when it is separated from the outer cylinder sleeve 1. The outer cylinder sleeve 1 is placed on the support sleeve 3. Since the interior of the support sleeve 3 is hollow, the inner sleeve 2 and the disassembly sleeve 17 both fall into the hollow structure of the support sleeve 3.

[0038] The present application is described in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the present application and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A bushing mechanism that is easy to disassemble, characterized in that: The invention comprises an outer cylinder sleeve (1) and an inner sleeve (2), wherein the outer cylinder sleeve (1) is sleeved on the outside of the inner sleeve (2), the outer cylinder sleeve (1) at least partially fits the inner sleeve (2), the inner sleeve (2) is connected to a disassembly-aiding component (5), the disassembly-aiding component (5) at least partially contacts the upper edge of the inner sleeve (2), a disassembly tool (4) applies force to the disassembly-aiding component (5), and the disassembly-aiding component (5) and the inner sleeve (2) are removed from the outer cylinder sleeve (1) together; the disassembly-aiding component (5) comprises two disassembly sleeves (17); the disassembly sleeve (17) is An opening (11) is provided, and after the disassembly aid component (5) is connected to the inner sleeve (2), the openings (11) of the two disassembly sleeves (17) are arranged opposite to each other; the disassembly tool (4) comprises a head (15) and a tail (16), and the tail (16) comprises a first end close to the head (15) and a second end away from the head (15); when the inner sleeve (2) is disassembled, the head (15) is located in the opening (11) and contacts the inner wall of the opening (11), and the end surface of the first end is located on the disassembly sleeve (17) and contacts the upper end surface of the disassembly sleeve (17).

2. The easily disassembled bushing mechanism according to claim 1, characterized in that: The outer peripheral wall of the disassembly sleeve (17) is provided with a first arc-shaped protrusion (8), and the lower edge of the first arc-shaped protrusion (8) at least partially fits with the upper edge of the inner liner sleeve (2).

3. The easily disassembled bushing mechanism according to claim 2, characterized in that: The inner bushing (2) has a "convex"-shaped structure, comprising a first portion and a second portion, the first portion being located above the second portion, the wall thickness of the first portion being smaller than the wall thickness of the second portion, and the width of the first arc-shaped protrusion (8) being smaller than or equal to the wall thickness of the first portion.

4. The easily disassembled bushing mechanism according to claim 3, characterized in that: The outer peripheral wall of the disassembly sleeve (17) is also provided with a first arc-shaped recess (9), and the first arc-shaped recess (9) is arranged below the first arc-shaped protrusion (8).

5. The easily disassembled bushing mechanism according to claim 1, characterized in that: The inner side of the opening (11) of the disassembly sleeve (17) is a conical surface (12), and the head (15) is a truncated cone structure, which is compatible with the conical surface (12).

6. The easily disassembled bushing mechanism according to claim 1, characterized in that: The inner wall of the outer cylinder sleeve (1) is provided with a first annular recess (6) and a second annular recess (7), the second annular recess (7) is located below the first annular recess (6), and the upper edge of the inner sleeve (2) is located at the second annular recess (7).

7. The easily disassembled bushing mechanism according to claim 6, characterized in that: The second annular recess (7) is connected to a first connecting surface (10) and a second connecting surface on both sides, respectively; the first connecting surface (10) is arranged close to the first annular recess (6); the distance between the first connecting surface (10) and the outer peripheral wall of the outer cylinder sleeve (1) is greater than the distance between the second connecting surface and the outer peripheral wall of the outer cylinder sleeve (1); and the fitting portion between the first arc-shaped protrusion (8) and the upper edge of the inner sleeve (2) is located between the first connecting surface (10) and the second connecting surface.

8. The easily disassembled bushing mechanism according to claim 2, characterized in that: The disassembly sleeve (17) comprises a middle portion (13) and two end portions (14), the two end portions (14) being located at two ends of the middle portion (13), respectively; the outer peripheral wall of the middle portion (13) is a curved surface, the outer peripheral wall of the end portions (14) is a flat surface, and the thickness of the end portions (14) is smaller than the thickness of the middle portion (13).

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