Lock nut convenient to disassemble and assemble

Abstract

The utility model relates to the field of nuts, and discloses a locknut convenient to disassemble and assemble, which comprises a bolt, a first nut and a second nut are respectively in threaded connection with the lower part of the bolt, a pressing part is integrally formed at the lower end of the first nut, the pressing part and the second nut are tightly pressed, a locking part is integrally formed above the first nut, and the locking part and the second nut are tightly pressed. The bolt is sleeved with a positioning sleeve, the locking part is tightly attached to the locking part, the positioning sleeve and the first nut are arranged outside the bolt in a matched mode, the locking part is arranged above the first nut, and when the first nut is connected with the positioning sleeve, the locking part is tightly attached to the positioning sleeve. And the expansion part on the locking part can expand outwards and is tightly pressed with the inner wall of the part of the mold, so that the connection strength is improved, the mold is not easy to loosen, and the mold is easy and convenient to mount and dismount.

Description

Technical Field

[0001] The utility model relates to the field of nuts, in particular to a locking nut which is easy to disassemble and install. Background Art

[0002] In a stamping die, two parts are generally connected using bolts and nuts. Usually, circular holes are opened in the two parts, and the bolts are passed through the circular holes and fixed with nuts. Since the stamping die will vibrate due to impact during use, long-term vibration will loosen the nut and bolt, causing the connection to fall off. In order to ensure the strength of the connection, the nut is generally a slotted nut, and the slotted nut requires a cotter pin. That is, a strip groove is opened on the side of the circular hole, and the cotter pin is placed in the strip groove and inserted into the slotted nut. This requires a lot of installation space. When the product is small, the mold structure is compact and the space is large, so it is inconvenient to load and unload the slotted nuts and cotter pins. The mold maintenance process requires disassembly and assembly of the slotted nuts and cotter pins, which wastes working time. To this end, we have designed a lock nut that is easy to disassemble and install. Utility Model Content

[0003] In order to solve the technical problem that a large installation space is required and the mold structure is compact when the product is small, so it is inconvenient to load and unload the slotted nuts and cotter pins, the utility model provides a locking nut that is easy to disassemble and install.

[0004] The utility model adopts the following technical solution: a locking nut that is easy to disassemble and install, comprising a bolt, a nut 1 and a nut 2 being threadedly connected below the bolt, a pressing portion being integrally formed at the lower end of the nut 1, and the pressing portion being tightly pressed against the nut 2;

[0005] A locking portion is integrally formed on the upper portion of the nut, a positioning sleeve is sleeved on the outer portion of the bolt, and the locking portion is tightly fitted with the locking portion.

[0006] As a further improvement of the above solution, a gasket is provided at the upper end of the positioning sleeve, and a part of the lower end of the positioning sleeve is cut away to form an abutment slope, and the cross-section of the abutment slope is a truncated cone structure. The gasket is used to contact the upper screw head of the bolt, thereby enabling the positioning sleeve to be sleeved in the mounting hole of the mold.

[0007] As a further improvement to the above solution, the locking portion includes a metal sleeve provided on the upper surface of the nut 1, and the axis of the metal sleeve is collinear with the axis of the nut 1. When the nut 1 is installed on the bolt, the spacing between the inner wall of the metal sleeve and each position of the outer surface of the bolt is consistent.

[0008] A plurality of expansion parts distributed in a circumferential array are integrally formed above the metal sleeve. An expansion slope is provided on the inner wall of the expansion part. The cross-section of the expansion slope is an inverted truncated cone structure. When the metal sleeve moves upward, the expansion slope will cause the expansion part to move upward along the abutment slope, thereby causing the expansion part to expand outward.

[0009] As a further improvement of the above solution, when the expansion part is not in contact with the positioning sleeve, the outer diameter of the expansion part is not larger than the outer diameter of the positioning sleeve, and the inner diameter of the upper part of the expansion part is smaller than the outer diameter above the abutting inclined surface. The expansion inclined surface will cause the expansion part to move upward along the abutting inclined surface, thereby causing the expansion part to expand outward, so that the expansion part is tightly pressed against the inner wall of the mounting hole of the mold, thereby improving the connection strength.

[0010] As a further improvement of the above scheme, the pressing part includes a plurality of pressing pieces distributed in a ring shape, a gap is provided between each two adjacent pressing pieces, and the outer surface cross-section of the pressing piece is a truncated cone structure. When the pressing piece contacts nut 2, the plurality of pressing pieces will be squeezed inward and deformed to a certain extent, so that the inner wall of the pressing piece contacts the outer surface of the bolt, thereby improving the connection strength and making it less likely to loosen.

[0011] As a further improvement of the above solution, a portion of the upper inner wall of the second nut is cut away to form a pressing bevel, the cross-section of the pressing bevel is a truncated cone structure, and the inner diameter of the pressing bevel is larger than the outer diameter of the pressing part. When the pressing piece contacts the second nut, multiple pressing pieces will be squeezed inward and deformed to a certain extent, thereby causing the inner wall of the pressing piece to contact the surface of the bolt.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. The utility model provides a positioning sleeve on the outside of the bolt, which is matched with a nut. A locking portion is provided above the nut. When the nut is connected to the positioning sleeve, the expansion portion on the locking portion can expand outward and tightly press against the inner wall of the mold component, thereby improving the connection strength and making it less likely to loosen. It is also easy to install and disassemble.

[0014] 2. By setting a pressing part under nut one, a pressing groove for pressing the pressing part is set inside nut two. When the two are connected, the pressing part can be pressed against the bolt, which improves the connection strength and is easy to install and disassemble as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a lock nut that is easy to disassemble and install provided by the utility model;

[0016] Figure 2 for Figure 1 Exploded diagram;

[0017] Figure 3 for Figure 1 Schematic diagram of connection with the mold;

[0018] Figure 4 for Figure 3 Schematic cross-sectional view of nut 1 and nut 2.

[0019] Description of main symbols:

[0020] 1. Bolt; 2. Positioning sleeve; 21. Gasket; 22. Abutment slope; 3. Nut 1; 4. Locking part; 41. Metal sleeve; 42. Expansion part; 43. Expansion slope; 5. Nut 2; 51. Pressing groove; 6. Pressing part; 61. Pressing piece; 62. Pressing slope. DETAILED DESCRIPTION

[0021] Below, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0022] Example:

[0023] Please combine Figures 1-4 The present embodiment provides a locking nut that is easy to disassemble and install, including a bolt 1, a nut 3 and a nut 5 are respectively threadedly connected to the lower portion of the bolt 1, and a pressing portion 6 is integrally formed at the lower end of the nut 3, and the pressing portion 6 is tightly pressed with the nut 5;

[0024] A locking portion 4 is integrally formed above the nut 3, and a positioning sleeve 2 is sleeved on the outside of the bolt 1, and the locking portion 4 fits tightly together.

[0025] A gasket 21 is provided at the upper end of the positioning sleeve 2, and a contact slope 22 is formed by cutting off the part at the lower end of the positioning sleeve 2, and the cross-section of the contact slope 22 is a truncated cone structure. The gasket 21 is used to contact the upper screw head of the bolt 1, so that the positioning sleeve 2 can be sleeved in the mounting hole of the mold.

[0026] The locking portion 4 includes a metal sleeve 41 disposed on the upper surface of the nut 3, and the axis of the metal sleeve 41 is collinear with the axis of the nut 3. When the nut 3 is mounted on the bolt 1, the spacing between the inner wall of the metal sleeve 41 and each position of the outer surface of the bolt 1 is consistent.

[0027] Multiple groups of expansion parts 42 distributed in a circular array are integrally formed above the metal sleeve 41. The inner wall of the expansion part 42 is provided with an expansion slope 43. The cross-section of the expansion slope 43 is an inverted truncated cone structure. When the metal sleeve 41 moves upward, the expansion slope 43 will cause the expansion part 42 to move upward along the abutment slope 22, thereby causing the expansion part 42 to expand outward.

[0028] When the expansion part 42 is not in contact with the positioning sleeve 2, the outer diameter of the expansion part 42 is not larger than the outer diameter of the positioning sleeve 2, and the inner diameter of the upper part of the expansion part 42 is smaller than the outer diameter of the upper part of the abutting slope 22. The expansion slope 43 will cause the expansion part 42 to move upward along the abutting slope 22, thereby causing the expansion part 42 to expand outward, so that the expansion part 42 is tightly pressed against the inner wall of the mounting hole of the mold, thereby improving the connection strength.

[0029] The pressing portion 6 includes a plurality of pressing pieces 61 distributed in a ring shape, with a gap between each two adjacent pressing pieces 61, and the outer surface cross-section of the pressing piece 61 is a truncated cone structure. When the pressing piece 61 contacts the nut 2 5, the plurality of pressing pieces 61 will be squeezed inward and deformed to a certain extent, so that the inner wall of the pressing piece 61 contacts the outer surface of the bolt 1, thereby improving the connection strength and making it not easy to loosen.

[0030] A portion of the upper inner wall of the nut 2 5 is cut away to form a pressing bevel 62. The cross-section of the pressing bevel 62 is a truncated cone structure, and the inner diameter of the pressing bevel 62 is larger than the outer diameter of the pressing portion 6. When the pressing piece 61 contacts the nut 2 5, multiple pressing pieces 61 will be squeezed inward and deformed to a certain extent, thereby causing the inner wall of the pressing piece 61 to contact the surface of the bolt 1.

[0031] The implementation principle of a locking nut that is easy to disassemble and install in the embodiment of the present application is: in actual use, when installing and connecting two parts of the mold, such as Figure 3 As shown, the two parts are provided with circular holes for connection, and large circular holes for installing nuts are provided on the upper and lower sides of the circular holes;

[0032] During connection, the positioning sleeve 2 is sleeved on the bolt 1, and the positioning sleeve 2 and the bolt 1 are inserted into the circular hole, and then the nut 3 is threadedly connected to the bolt 1. After the nut 3 is connected to a certain extent, the locking portion 4 will contact the positioning sleeve 2. Since the lower end of the positioning sleeve 2 is cut away to form a truncated cone-shaped abutting inclined surface 22, and the inner wall of the expansion portion 42 of the locking portion 4 is provided with an expansion inclined surface 43 with an inverted truncated cone-shaped cross-section, when the metal sleeve 41 moves upward, the expansion inclined surface 43 will cause the expansion portion 42 to move upward along the abutting inclined surface 22, thereby causing the expansion portion 42 to expand outward, so that the expansion portion 42 is tightly pressed against the inner wall of the mounting hole of the mold, thereby improving the connection strength.

[0033] Then, the second nut 5 is threaded onto the bolt 1. Since the outer surface cross-section of the pressing piece 61 is a truncated cone structure, a portion of the upper inner wall of the second nut 5 is cut away to form a pressing inclined surface 62. When the pressing piece 61 contacts the second nut 5, the multiple pressing pieces 61 will be squeezed inward and deformed to a certain extent, so that the inner wall of the pressing piece 61 contacts the outer surface of the bolt 1, thereby improving the connection strength and preventing it from loosening.

[0034] When disassembling, use the corresponding tools to disassemble nut 2 5 and nut 1 3 in sequence.

[0035] A positioning sleeve 2 is provided on the outside of the bolt 1, and a nut 3 is provided in conjunction therewith. A locking portion 4 is provided above the nut 3. When the nut 3 is connected to the positioning sleeve 2, the expansion portion 42 on the locking portion 4 can expand outward and tightly press against the inner wall of the mold component, thereby improving the connection strength and making it less likely to loosen. The invention is also easy to install and disassemble.

[0036] By setting a pressing part 6 under nut 1 3, a pressing groove 51 for pressing the pressing part 6 is set inside nut 2 5. When the two are connected, the pressing part 6 can be pressed against the bolt 1, which improves the connection strength and makes the overall installation convenient and easy to disassemble.

[0037] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A lock nut that is easy to disassemble and install, characterized in that: It comprises a bolt (1), wherein a nut (3) and a nut (5) are respectively threadedly connected below the bolt (1), and a pressing portion (6) is integrally formed at the lower end of the nut (3), and the pressing portion (6) is tightly pressed with the nut (5); A locking portion (4) is integrally formed on the upper portion of the nut (3), a positioning sleeve (2) is sleeved on the outer portion of the bolt (1), and the locking portion (4) is tightly fitted.

2. A lock nut that is easy to disassemble and install as claimed in claim 1, characterized in that: A gasket (21) is provided at the upper end of the positioning sleeve (2), and a contact inclined surface (22) is formed by cutting away a portion of the lower end of the positioning sleeve (2), and the cross section of the contact inclined surface (22) is a truncated cone structure.

3. The anti-loosening nut that is easy to disassemble and install according to claim 1, characterized in that: The locking portion (4) includes a metal sleeve (41) arranged on the upper surface of the nut (3), and the axis of the metal sleeve (41) is collinear with the axis of the nut (3); A plurality of expansion portions (42) distributed in a circumferential array are integrally formed above the metal sleeve (41), and an expansion slope (43) is provided on the inner wall of the expansion portion (42). The cross section of the expansion slope (43) is an inverted truncated cone structure.

4. A lock nut that is easy to disassemble and install as claimed in claim 3, characterized in that: When the expansion portion (42) is not in contact with the positioning sleeve (2), the outer diameter of the expansion portion (42) is not larger than the outer diameter of the positioning sleeve (2), and the inner diameter above the outer portion of the expansion portion (42) is smaller than the outer diameter above the abutting inclined surface (22).

5. The anti-loosening nut that is easy to disassemble and install according to claim 1, characterized in that: The pressing portion (6) comprises a plurality of pressing sheets (61) distributed in an annular shape, a gap is provided between every two adjacent pressing sheets (61), and the outer surface cross-section of the pressing sheet (61) is a truncated cone structure.

6. A lock nut that is easy to disassemble and install as claimed in claim 5, characterized in that: A portion of the upper inner wall of the nut 2 (5) is cut away to form a pressing bevel (62), the cross section of the pressing bevel (62) is a truncated cone structure, and the inner diameter of the pressing bevel (62) is greater than the outer diameter of the pressing portion (6).

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