Anti-rotation double-end bolt

Abstract

The utility model relates to the technical field of studs, and discloses an anti-rotation stud which comprises a screw, nuts are arranged on the left side and the right side of the outside of the screw, connecting plates are arranged on the left side and the right side of the screw, and a fixing block is fixedly connected to the side, close to the middle, of each connecting plate. According to the anti-rotation double-end bolt, the nut, the connecting plate, the limiting sleeve, the limiting groove, the fixing rod, the fixing block, the protruding block and the groove are arranged, the top end of the fixing rod is inserted into the limiting groove, the fixing rod is held to limit and fix the screw rod when the nut is rotated, and the screw rod and the nut are prevented from rotating at the same time; after the nut is rotated to a proper position, the limiting sleeve and the protruding block outside the fixing block are arranged outside the guide rod in a sleeving mode and embedded into the groove correspondingly, so that the nut can be limited, the nut is prevented from accidentally rotating outside the screw rod, and the problem that the nut outside the stud is inconvenient to fix, and the service life of the stud is prolonged is solved. And the bolt is easy to rotate accidentally during installation.

Description

TECHNICAL FIELD

[0001] The utility model relates to double -end bolt technical field, concretely is a kind of double -end bolt of preventing rotation. BACKGROUND

[0002] Double-end bolt, also known as double-end screw or stud, is a special type of bolt, characterized by having threads on one or both ends, while the middle part is a smooth rod. This design makes the double-end bolt more stable when connecting. Double-end bolt plays an important role in engineering and manufacturing due to its unique design and diverse application scenarios.

[0003] There are some problems with common double-end bolts, such as; the nut on the outside of the double-end bolt can easily rotate accidentally, making it inconvenient to fix the nut on the outside of the double-end bolt, and the bolt can easily rotate accidentally during installation.

[0004] Therefore, we propose a double-end bolt to prevent rotation to improve the above problems. INVENTION CONTENTS

[0005] The utility model aims at providing a double-end bolt to prevent rotation to solve the problem of inconvenient fixing of the nut on the outside of the double-end bolt and accidental rotation of the bolt during installation in the background technology.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: a double-end bolt to prevent rotation, comprising a screw rod, the left and right sides of the screw rod are provided with nuts, the left and right sides of the screw rod are provided with connecting plates, the side close to the middle of the connecting plate is fixedly connected with a fixed block, the outside of the fixed block is processed with a protruding block, the edges of the left and right sides inside the screw rod are processed with grooves, the top end of the side close to the middle of the connecting plate is fixedly connected with a limiting sleeve, the top end of the side close to the outside of the nut is fixedly connected with a guide rod, the left and right sides of the bottom end inside the connecting plate are provided with limiting grooves, the inside of the limiting groove is provided with a fixed rod, and the side close to the middle of the nut is provided with a gasket.

[0007] As a further technical scheme of the utility model, the protruding block and the groove are respectively provided with multiple groups, and the protruding block is embedded in the inside of the groove.

[0008] As a further technical scheme of the utility model, the nut and the two sides outside the screw rod cooperate with each other, and the limiting sleeve movably sleeves the outside of the limiting rod.

[0009] As a further technical solution of this utility model, the screw is coated with a protective layer on the outside, and the protective layer is provided with an anti-corrosion coating and a wear-resistant coating on the inside. The anti-corrosion coating is coated on the outside of the screw, and the wear-resistant coating is coated on the outside of the anti-corrosion coating. The anti-corrosion coating is an epoxy anti-corrosion coating.

[0010] As a further technical solution of this utility model, a housing is fixedly connected to the top of the limiting sleeve near the middle side, a pull plate is provided at the top of the housing, a fixing plate is fixedly connected to the bottom of the housing, a spring is fixedly connected to the top of the housing, a connecting rod is fixedly connected to the bottom of the pull plate, a movable plate is fixedly connected to the bottom of the connecting rod, a limiting rod is fixedly connected to the bottom of the movable plate, and a fixing hole is provided at the top of the guide rod.

[0011] As a further technical solution of this utility model, multiple sets of fixing holes are provided, the limiting rod is embedded inside the fixing hole, and the spring is fixedly connected between the top of the movable plate and the inside of the housing.

[0012] Compared with the prior art, the beneficial effects of this utility model are: the anti-rotation double-ended bolt not only facilitates the fixing of nuts and bolts and improves the service life of bolts, but also facilitates the fixing of limit sleeves;

[0013] (1) By setting a nut, connecting plate, limiting sleeve, limiting groove, fixing rod, fixing block, protrusion and groove, the top of the fixing rod is inserted into the limiting groove. When rotating the nut, the fixing rod is held to limit and fix the screw, preventing the screw and nut from rotating at the same time. After rotating the nut to the appropriate position, the protrusion on the outside of the limiting sleeve and the fixing block are respectively put on the outside of the guide rod and embedded in the groove, so as to limit the nut and prevent the nut from rotating accidentally outside the screw.

[0014] (2) By setting a protective layer, an anti-corrosion coating and a wear-resistant coating, the wear-resistant coating can protect the outside of the screw and make the screw wear-resistant, preventing excessive wear of the screw from affecting its use. The anti-corrosion coating can make the screw corrosion-resistant, preventing the outside of the screw from rusting and affecting the rotation of the nut.

[0015] (3) By setting a fixed hole, spring, pull plate, movable plate, fixed plate, limit rod and housing, the guide rod is embedded in the inside of the limit sleeve and then the pull plate is released. The spring uses its own elasticity to drive the connecting rod and movable plate to lower the limit rod, so that the limit rod is embedded in the inside of the fixed hole, and the limit sleeve is limited and fixed to prevent the fixed block on one side of the connecting plate from accidentally leaving the inside of the screw. Attached Figure Description

[0016] Figure 1 This is a frontal cross-sectional view of the present invention.

[0017] Figure 2 This is an enlarged side view cross-sectional diagram of the connecting plate of this utility model;

[0018] Figure 3 This is a partial enlarged cross-sectional structural diagram of the protective layer of this utility model;

[0019] Figure 4 For the present utility model Figure 1 Enlarged cross-sectional view of point A in the middle.

[0020] In the diagram: 1. Screw; 2. Nut; 3. Connecting plate; 4. Limiting sleeve; 5. Washer; 6. Limiting groove; 7. Fixing rod; 8. Fixing block; 9. Protrusion; 10. Groove; 11. Protective layer; 12. Anti-corrosion coating; 13. Wear-resistant coating; 14. Fixing hole; 15. Spring; 16. Pull plate; 17. Connecting rod; 18. Movable plate; 19. Fixing plate; 20. Limiting rod; 21. Guide rod; 22. Housing. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-4 This utility model provides an embodiment of a double-ended bolt for preventing rotation, comprising a screw 1, nuts 2 on the left and right sides of the screw 1, connecting plates 3 on the left and right sides of the screw 1, a fixing block 8 fixedly connected to the side of the connecting plate 3 near the middle, a protrusion 9 machined on the outside of the fixing block 8, grooves 10 machined on the left and right edges inside the screw 1, a limiting sleeve 4 fixedly connected to the top of the connecting plate 3 near the middle, a guide rod 21 fixedly connected to the top of the nut 2 near the outside, limiting grooves 6 opened on the left and right sides of the bottom inside the connecting plate 3, a fixing rod 7 provided inside the limiting groove 6, and a washer 5 provided on the side of the nut 2 near the middle.

[0023] Multiple sets of protrusions 9 and grooves 10 are provided. The protrusions 9 are embedded in the grooves 10. The nut 2 and the two sides of the screw 1 cooperate with each other. The limiting sleeve 4 is movably sleeved on the outside of the limiting rod 20.

[0024] Specifically, such as Figure 1 and Figure 2As shown, the top of the fixing rod 7 is inserted into the limiting groove 6. When rotating the nut 2, the fixing rod 7 is held to limit and fix the screw 1, preventing the screw 1 and the nut 2 from rotating at the same time. After rotating the nut 2 to the appropriate position, the limiting sleeve 4 and the protrusion 9 on the outside of the fixing block 8 are respectively put on the outside of the guide rod 21 and embedded in the groove 10, so as to limit the nut 2 and prevent the nut 2 from rotating accidentally outside the screw 1.

[0025] The screw 1 is coated with a protective layer 11 on the outside. The protective layer 11 is provided with an anti-corrosion coating 12 and a wear-resistant coating 13 inside. The anti-corrosion coating 12 is coated on the outside of the screw 1, and the wear-resistant coating 13 is coated on the outside of the anti-corrosion coating 12. The anti-corrosion coating 12 is an epoxy anti-corrosion coating.

[0026] Specifically, such as Figure 3 As shown, the wear-resistant coating 13 can protect the outside of the screw 1, giving the screw 1 wear-resistant properties and preventing excessive wear of the screw 1 from affecting its use. The anti-corrosion coating 12 can give the screw 1 anti-corrosion properties, preventing the outside of the screw 1 from rusting and affecting the rotation of the nut 2.

[0027] A housing 22 is fixedly connected to the top of the limiting sleeve 4 near the middle. A pull plate 16 is provided at the top of the housing 22. A fixing plate 19 is fixedly connected to the bottom of the inside of the housing 22. A spring 15 is fixedly connected to the top of the inside of the housing 22. A connecting rod 17 is fixedly connected to the bottom of the pull plate 16. A movable plate 18 is fixedly connected to the bottom of the connecting rod 17. A limiting rod 20 is fixedly connected to the bottom of the movable plate 18. A fixing hole 14 is provided at the top of the inside of the guide rod 21. Multiple sets of fixing holes 14 are provided. The limiting rod 20 is embedded in the inside of the fixing hole 14. The spring 15 is fixedly connected between the movable plate 18 and the top of the inside of the housing 22.

[0028] Specifically, such as Figure 1 and Figure 4 As shown, after the guide rod 21 is embedded inside the limiting sleeve 4, the pull plate 16 is released. The spring 15 uses its own elasticity to cause the connecting rod 17 and the movable plate 18 to drive the limiting rod 20 down, so that the limiting rod 20 is embedded inside the fixing hole 14, which limits and fixes the limiting sleeve 4, preventing the fixing block 8 on one side of the connecting plate 3 from accidentally coming out of the screw 1.

[0029] Working principle: In use, the top of the fixing rod 7 is inserted into the limiting groove 6. When rotating the nut 2, the fixing rod 7 is held to limit and fix the screw 1, preventing the screw 1 and nut 2 from rotating simultaneously. After rotating the nut 2 to the appropriate position, the pull plate 16 is pulled. The pull plate 16 drives the limiting rod 20 to rise. Then, the limiting sleeve 4 and the protrusion 9 on the outside of the fixing block 8 are respectively fitted onto the outside of the guide rod 21 and embedded in the groove 10, thereby limiting the nut 2 and preventing the nut 2 from rotating accidentally outside the screw 1. The guide rod 21 is embedded in the limiting sleeve. After the pull plate 16 is released from the inside of 4, the spring 15 uses its own elasticity to cause the connecting rod 17 and the movable plate 18 to drive the limiting rod 20 down, so that the limiting rod 20 is embedded in the inside of the fixing hole 14, and the limiting sleeve 4 is limited and fixed to prevent the fixing block 8 on one side of the connecting plate 3 from accidentally detaching from the inside of the screw 1. The wear-resistant coating 13 can protect the outside of the screw 1, so that the screw 1 has wear resistance and prevents the screw 1 from being worn too much and affecting its use. The anti-corrosion coating 12 can make the screw 1 have anti-corrosion properties and prevent the outside of the screw 1 from rusting and affecting the rotation of the nut 2.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A double-ended stud bolt for preventing rotation, comprising a threaded rod (1), characterized in that: Nuts (2) are provided on the left and right sides of the outside of the screw (1). Connecting plates (3) are provided on the left and right sides of the screw (1). A fixing block (8) is fixedly connected to the side of the connecting plate (3) near the middle. A protrusion (9) is machined on the outside of the fixing block (8). Grooves (10) are machined on the edges of the left and right sides inside the screw (1). A limiting sleeve (4) is fixedly connected to the top of the side of the connecting plate (3) near the middle. A guide rod (21) is fixedly connected to the top of the side of the nut (2) near the outside. Limiting grooves (6) are opened on the left and right sides of the bottom of the inside of the connecting plate (3). A fixing rod (7) is provided inside the limiting groove (6). A washer (5) is provided on the side of the nut (2) near the middle.

2. The anti-rotation double-ended bolt according to claim 1, characterized in that: The protrusions (9) and grooves (10) are provided in multiple sets, and the protrusions (9) are embedded in the grooves (10).

3. The anti-rotation double-ended bolt according to claim 1, characterized in that: The nut (2) and the two sides of the screw (1) cooperate with each other, and the limiting sleeve (4) is movably sleeved on the outside of the limiting rod (20).

4. The anti-rotation double-ended bolt according to claim 1, characterized in that: The screw (1) is coated with a protective layer (11) on the outside. The protective layer (11) is provided with an anti-corrosion coating (12) and a wear-resistant coating (13) inside. The anti-corrosion coating (12) is coated on the outside of the screw (1), and the wear-resistant coating (13) is coated on the outside of the anti-corrosion coating (12). The anti-corrosion coating (12) is an epoxy anti-corrosion coating.

5. The anti-rotation double-ended bolt according to claim 1, characterized in that: The top of the limiting sleeve (4) is fixedly connected to a housing (22) near the middle. A pull plate (16) is provided at the top of the housing (22). A fixing plate (19) is fixedly connected to the bottom of the housing (22). A spring (15) is fixedly connected to the top of the housing (22). A connecting rod (17) is fixedly connected to the bottom of the pull plate (16). A movable plate (18) is fixedly connected to the bottom of the connecting rod (17). A limiting rod (20) is fixedly connected to the bottom of the movable plate (18). A fixing hole (14) is opened at the top of the guide rod (21).

6. The anti-rotation double-ended bolt according to claim 5, characterized in that: The fixing hole (14) is provided in multiple sets, the limiting rod (20) is embedded in the fixing hole (14), and the spring (15) is fixedly connected between the top of the movable plate (18) and the inside of the housing (22).

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