Screw capable of preventing loosening

Abstract

The utility model relates to the technical field of screws, and discloses an anti-loosening screw which comprises a screw body and a nut, the lower end of the screw body is fixedly connected with a sliding rod, the outer wall of the sliding rod is slidably connected with a sleeve, the upper end of the sleeve is fixedly connected with a fixed sleeve matched with the nut, and the lower end of the outer wall of the sleeve is in threaded connection with a movable sleeve. Symmetrical limiting assemblies are arranged on the inner wall of the sleeve. According to the screw capable of preventing loosening, the sleeve is arranged, the fixing sleeve matched with the nut is arranged on the sleeve, after the sleeve is installed on the sliding rod, the inner wall of the fixing sleeve is attached to the outer wall of the nut, the limiting assembly can operate by sliding the movable cylinder, and therefore the sleeve is limited, and the screw capable of preventing loosening has the beneficial effects that the sleeve is not prone to loosening; according to the screw, the screw body and the nut can be fixed, so that rotation between the screw body and the nut is effectively prevented, and loosening between the screw body and the nut is effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of screws, in particular to a screw which can prevent loosening. Background Art

[0002] Screws are tools that use the physics and mathematical principles of the circular rotation of the inclined surface of an object and the friction force to gradually fasten objects and machine parts. Screw is a general term for fasteners and a daily colloquialism. Screws are indispensable industrial necessities in daily life: such as very small screws used in cameras, glasses, clocks, electronics, etc.; general screws for televisions, electrical products, musical instruments, furniture, etc.; as for engineering, construction, and bridges, large screws and nuts are used; transportation equipment, airplanes, trams, cars, etc. use both large and small screws. Screws have important tasks in industry, and as long as there is industry on the earth, the function of screws will always be important. Screws are a common invention of people's production and life for thousands of years. In terms of application areas, it is the first invention of mankind. The main function of a screw is to connect two workpieces together for fastening, and screws usually need to be used in conjunction with nuts;

[0003] However, when the existing screws are used for a long time, the screws and nuts are prone to loosening depending on the usage scenario, which can easily lead to the two parts being loosened, resulting in the parts being separated, and thus more dangerous accidents.

[0004] In order to solve the above problem, the present application proposes a screw that can prevent loosening. Utility Model Content

[0005] The utility model aims to provide a screw capable of preventing loosening, and is mainly used to solve the problem that the existing screw and nut are easy to loosen, resulting in the easy loosening of the two components.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0007] A screw capable of preventing loosening comprises a screw body and a nut. The lower end of the screw body is fixedly connected to a sliding rod, the outer wall of the sliding rod is slidably connected to a sleeve, the upper end of the sleeve is fixedly connected to a fixing sleeve matching the nut, the lower end of the outer wall of the sleeve is threadedly connected to a moving cylinder, and the inner wall of the sleeve is provided with symmetrical limiting components.

[0008] The working principle and beneficial effects of the utility model:

[0009] 1. Working principle: After connecting the two workpieces together through the screw body and the nut, install the sleeve on the sliding rod at one end of the screw body, and fix the fixed sleeve on the nut, rotate the moving cylinder to move it in the direction of the fixed sleeve. When the moving cylinder moves to a certain extent, the limit assembly can play a better limiting role on the sleeve, and the screw can be used normally.

[0010] 2. Beneficial effect: By providing a sleeve, a fixing sleeve matching the nut is provided on the sleeve. After the sleeve is installed on the sliding rod, the inner wall of the fixing sleeve fits with the outer wall of the nut. The limiting assembly can be operated by sliding the moving cylinder to limit the sleeve. The advantage of such a setting is that the screw body and the nut can be fixed, thereby effectively preventing the screw body and the nut from rotating, and then effectively preventing the screw body and the nut from loosening.

[0011] Preferably, the limit assembly includes a sleeve with a first sliding cavity symmetrically formed on the inner wall of the sleeve, a second sliding cavity corresponding to the first sliding cavity formed on the outer wall of the sleeve, the first sliding cavity is internally slidably connected to a limit block, the outer wall of the slide rod is provided with a limit groove matching the limit block, the limit block is fixedly connected to a connecting rod on a side away from the slide rod, the other end of the connecting rod extends to the inside of the second sliding cavity and is fixedly connected to a wedge block, the wedge block extends out of the sleeve on a side away from the connecting rod, and a spring is fixedly connected to a side of the inner wall of the second sliding cavity away from the wedge block, the other end of the spring is fixedly connected to the wedge block, after the sleeve is installed on the slide rod, the moving cylinder is rotated to move it in the direction of the fixed sleeve, and the moving cylinder continues to rotate when it contacts the wedge block, and the inner wall of the moving cylinder The wall will squeeze the wedge block to move downward, and at the same time squeeze the spring to make it in a compressed state. When the wedge block moves downward, the connecting rod can drive the limit block to move into the limit groove. The clamping connection between the limit block and the limit groove can play a better limiting role on the sleeve, and the screw can be used normally, and the anti-loosening effect is better. When the screw needs to be further removed, the moving cylinder is rotated in the reverse direction to move it away from the fixed sleeve. When the moving cylinder is away from the wedge block, the wedge block will pop out under the action of the spring and drive the limit block to disengage from the limit groove, so that the sleeve can be removed from the sliding rod, and the screw can be removed at this time. The advantage of this arrangement is that it not only has a better anti-loosening effect on the screw, but also makes disassembly and assembly of the screw more convenient.

[0012] Preferably, a symmetrical guide block is fixedly connected to the inner wall of the sleeve, and a guide groove matching the guide block is provided on the outer wall of the slide rod. When installing the sleeve, the guide block provided on the inner wall of the sleeve and the guide groove provided on the outer wall of the slide rod can provide a better guiding effect for the sleeve, thereby making the installation of the sleeve more convenient.

[0013] Preferably, the number of springs inside the second sliding cavity is not less than four, and the springs are symmetrically arranged inside the second sliding cavity. When the screw is further removed, the movable cylinder is rotated to move it in the direction away from the fixed sleeve. When the movable cylinder moves away from the wedge block, the wedge block will pop out under the action of the spring and drive the limit block to disengage from the limit groove. By setting the number of springs inside the second sliding cavity to be not less than four, the elastic force of the spring on the wedge block can be greater, thereby making the stability higher when the spring drives the wedge block to slide.

[0014] Preferably, sliders are fixedly connected to both sides of the wedge block, and a sliding groove matching the slider is provided on the inner wall of the second sliding cavity. When the wedge block slides inside the second sliding cavity, the sliders arranged on both sides of the wedge block and the sliding groove provided on the inner wall of the second sliding cavity can play a better limiting and guiding role for the wedge block, thereby making the wedge block more stable when sliding inside the second sliding cavity and effectively preventing the wedge block from escaping from the second sliding cavity.

[0015] Preferably, the outer wall of the moving cylinder is provided with a rubber sleeve, and the outer wall of the rubber sleeve is provided with anti-slip grooves. The rubber sleeve provided on the outer wall of the moving cylinder can make people's hands more comfortable when rotating the moving cylinder. The anti-slip grooves provided on the outer wall of the rubber sleeve can effectively increase the friction between people's hands and the moving cylinder, preventing people's hands from slipping when rotating the moving cylinder.

[0016] Preferably, the corners of the guide groove away from one end of the screw body are all chamfered. By setting the corners on one side of the guide groove as chamfers, it is easier for people to insert the guide block on the inner wall of the sleeve into the guide groove when installing the sleeve, thereby making the installation of the sleeve more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the explosion structure of the utility model as a whole;

[0019] Figure 3 It is a schematic diagram of the overall cross-sectional structure of the sleeve of the utility model;

[0020] Figure 4 It is a schematic diagram of the partial cross-sectional structure of the limiting component of the utility model.

[0021] In the figure: 1. screw body; 2. nut; 3. slide rod; 4. sleeve; 5. fixed sleeve; 6. first slide cavity; 7. second slide cavity; 8. limit block; 9. limit groove; 10. connecting rod; 11. wedge block; 12. spring; 13. moving cylinder; 14. guide block; 15. guide groove; 16. slider; 17. slide groove. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-4 A screw that can prevent loosening includes a screw body 1 and a nut 2. The lower end of the screw body 1 is fixedly connected with a slide rod 3. The outer wall of the slide rod 3 is slidably connected with a sleeve 4. The inner wall of the sleeve 4 is fixedly connected with a symmetrical guide block 14. The outer wall of the slide rod 3 is provided with a guide groove 15 matching the guide block 14. The corners of the guide groove 15 away from one end of the screw body 1 are all chamfered, which can play a good guiding role for the sleeve 4, thereby making the installation of the sleeve 4 more convenient. The upper end of the sleeve 4 is fixedly connected with a fixing sleeve 5 matching the nut 2. The sleeve 4 is installed to the screw body 1. After the sliding rod 3 is put on, the inner wall of the fixed sleeve 5 fits with the outer wall of the nut 2, so that the nut 2 and the screw body 1 rotate synchronously when the screw body 1 rotates, thereby having a better anti-loosening effect on the screw. The lower end of the outer wall of the sleeve 4 is threadedly connected with a moving cylinder 13, and the outer wall of the moving cylinder 13 is sleeved with a rubber sleeve, and the outer wall of the rubber sleeve is provided with anti-slip grooves. The inner wall of the sleeve 4 is provided with symmetrical limiting components. The moving cylinder 13 is rotated to move it in the direction of the fixed sleeve 5. When the moving cylinder 13 moves to a certain extent, the limiting component can play a better limiting role on the sleeve 4, and the screw can be used normally.

[0024] like Figure 2 , Figure 3 and Figure 4As shown, the limiting assembly includes a first sliding cavity 6 symmetrically provided on the inner wall of the sleeve 4, a second sliding cavity 7 corresponding to the first sliding cavity 6 provided on the outer wall of the sleeve 4, a limiting block 8 slidably connected inside the first sliding cavity 6, a limiting groove 9 matching the limiting block 8 provided on the outer wall of the slide rod 3, a connecting rod 10 fixedly connected to the side of the limiting block 8 away from the slide rod 3, the other end of the connecting rod 10 extends to the inside of the second sliding cavity 7 and is fixedly connected to a wedge block 11, the wedge block 11 extends out of the sleeve 4 away from the side of the connecting rod 10, the wedge block 11 is slidably connected to the inner wall of the second sliding cavity 7, sliders 16 are fixedly connected on both sides of the wedge block 11, a sliding groove 17 matching the slider 16 is provided on the inner wall of the second sliding cavity 7, a spring 12 is fixedly connected to the side of the inner wall of the second sliding cavity 7 away from the wedge block 11, the other end of the spring 12 is fixedly connected to the wedge block 11, the number of springs 12 in the second sliding cavity 7 is not less than four, and the springs 12 are symmetrically arranged inside the second sliding cavity 7. When the sleeve 4 is installed on the sliding rod 3, the moving cylinder 13 is rotated to make it move in the direction of the fixed sleeve 5. When it contacts the wedge block 11, the moving cylinder 13 continues to be rotated. The inner wall of the moving cylinder 13 will squeeze the wedge block 11 to move downward, and at the same time, the spring 12 is squeezed to make it in a compressed state. The wedge block 11 moves downward, and the connecting rod 10 can drive the limiting block 8 to move inside the limiting groove 9. The engagement of the limiting block 8 and the limiting groove 9 can play a good limiting role on the sleeve 4, and the screw can be used normally, and the anti-loosening effect is better. When it is necessary to continue to disassemble the screw, the moving cylinder 13 is rotated in the opposite direction to make it move in the direction away from the fixed sleeve 5. When the moving cylinder 13 is away from the wedge block 11, the wedge block 11 will pop up under the action of the spring 12 and drive the limiting block 8 to disengage from the limiting groove 9, so that the sleeve 4 can be removed from the sliding rod 3, and the screw can be removed at this time.

[0025] From the above, it can be seen that the specific implementation of the utility model is as follows:

[0026] When the screw is removed, the moving cylinder 13 is rotated in the opposite direction to move it in the direction away from the fixed sleeve 5. When the moving cylinder 13 is away from the wedge block 11, the wedge block 11 will pop up under the action of the spring 12 and drive the limiting block 8 to disengage from the limiting groove 9, so that the sleeve 4 can be removed from the sliding rod 3. At this time, the screw can be removed.

[0027] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A screw capable of preventing loosening, comprising a screw body (1) and a nut (2), It is characterized in that The lower end of the screw body (1) is fixedly connected to a slide rod (3), the outer wall of the slide rod (3) is slidably connected to a sleeve (4), the upper end of the sleeve (4) is fixedly connected to a fixed sleeve (5) matching the nut (2), the lower end of the outer wall of the sleeve (4) is threadedly connected to a moving cylinder (13), and the inner wall of the sleeve (4) is provided with symmetrical limit assemblies.

2. A screw capable of preventing loosening according to claim 1, Features: The limiting assembly comprises a sleeve (4) having an inner wall provided with a symmetrical first sliding cavity (6), an outer wall of the sleeve (4) having a second sliding cavity (7) corresponding to the first sliding cavity (6), the first sliding cavity (6) being internally slidably connected to a limiting block (8), an outer wall of the sliding rod (3) having a limiting groove (9) matching the limiting block (8), a connecting rod (10) being fixedly connected to the side of the limiting block (8) away from the sliding rod (3), the other end of the connecting rod (10) extending into the inside of the second sliding cavity (7) and being fixedly connected to a wedge block (11), the side of the wedge block (11) away from the connecting rod (10) extending out of the sleeve (4), the wedge block (11) being slidably connected to the inner wall of the second sliding cavity (7), a side of the inner wall of the second sliding cavity (7) away from the wedge block (11) being fixedly connected to a spring (12), the other end of the spring (12) being fixedly connected to the wedge block (11).

3. A screw capable of preventing loosening according to claim 1, Features: A symmetrical guide block (14) is fixedly connected to the inner wall of the sleeve (4), and a guide groove (15) matching the guide block (14) is formed on the outer wall of the slide rod (3).

4. A screw capable of preventing loosening according to claim 2, Features: The number of springs (12) inside the second sliding cavity (7) is no less than four, and the springs (12) are symmetrically arranged inside the second sliding cavity (7).

5. A screw capable of preventing loosening according to claim 2, Features: Slide blocks (16) are fixedly connected to both sides of the wedge block (11), and a slide groove (17) matching the slide block (16) is formed on the inner wall of the second slide cavity (7).

6. A screw capable of preventing loosening according to claim 1, Features: The outer wall of the moving cylinder (13) is covered with a rubber sleeve, and the outer wall of the rubber sleeve is provided with anti-skid patterns.

7. A screw capable of preventing loosening according to claim 3, Features: The corners of the guide groove (15) away from one end of the screw body (1) are all chamfered.

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