A double stroke sleeve without falling screw

Abstract

The application relates to the technical field of hardware tools, in particular to a double-stroke sleeve without screw dropping, which comprises an outer sleeve, an inner sleeve, an electric screwdriver shaft, a first elastic component, a first limiting component, a second elastic component, a second limiting component and a plurality of movable components. The double-stroke screw sleeve disclosed by the application is helpful to guarantee the precision and efficiency of screw driving.

Description

Technical Field

[0001] This application relates to the field of hardware tool technology, specifically to a double-stroke socket that will not lose screws. Background Technology

[0002] A screw socket is a specialized accessory used to tighten screws. One end of the socket connects to an electric screwdriver, and the other end is used to secure the screw. When using it, the electric screwdriver is held to quickly tighten the screw to the designated location. An example application is a metal sheet factory building constructed from sheet metal roofing sheets and corrugated steel sheets along with other building materials. During construction, a large number of self-drilling screws are needed to tighten and secure the sheet metal roofing sheets. When using existing electric screwdriver sockets, screws are prone to falling out of the socket, affecting work efficiency. Existing technology includes screw sockets with built-in magnetic components, which can solve the problem of screws falling out. However, due to frequent contact with the screw, the magnetic components are prone to wear and damage, easily attracting large amounts of iron filings and other debris, and causing the screw to become misaligned, affecting work efficiency and screwing accuracy. Utility Model Content

[0003] In view of this, this application provides a double-stroke sleeve that will not lose screws, in order to solve all or part of the technical problems described in the background section of this application.

[0004] The innovative approach of this application is as follows: 1. The screw is fixed by using steel balls to press the screw radially inward from the sleeve; 2. A double-stroke sleeve is used, with an inner sleeve inside the outer sleeve, and an electric screwdriver spindle inside the inner sleeve; when removing the screw, the electric screwdriver spindle and the inner sleeve are pushed to extend towards the front end of the outer sleeve, while the steel balls are squeezed out of the inner sleeve. After the screw is placed into the screw slot of the electric screwdriver spindle, the electric screwdriver spindle and the inner sleeve return to their original positions under the action of their respective return components. At this time, the steel balls are partially squeezed into the inner sleeve by the outer sleeve to clamp the screw; 3. When tightening the screw, the electric screwdriver drives the electric screwdriver spindle to rotate, and the screw gradually goes deeper; at the same time, the electric screwdriver spindle and the inner sleeve gradually extend towards the front end of the outer sleeve; after the screw is tightened, the outer sleeve contacts the building material, and the steel balls are simultaneously squeezed out of the inner sleeve by the electric screwdriver spindle to loosen the screw; then the next screw is inserted.

[0005] The solution provided in this application to resolve its technical problem is as follows: A double-stroke sleeve that prevents screws from falling off, characterized in that it includes an outer sleeve, an inner sleeve, and an electric screwdriver spindle; The outer sleeve has a front sleeve cavity and a rear sleeve cavity arranged sequentially from front to back; a sleeve cavity partition is provided between the front sleeve cavity and the rear sleeve cavity; the front sleeve cavity includes an outer expansion section and an inner pressure section; The inner sleeve has a bit moving cavity and a shaft receiving cavity arranged sequentially from front to back; a bit shaft cavity partition is provided between the bit moving cavity and the shaft receiving cavity; and several locking holes are provided on the side wall of the bit moving cavity. The electric screwdriver spindle includes a screwdriver head, a shaft, and a connecting part; the screwdriver head is located in the screwdriver head movable cavity and can be blocked by the screwdriver shaft cavity partition, the shaft passes through and is housed in the shaft housing cavity, and the connecting part extends out of the shaft housing cavity; The double-stroke sleeve that prevents screws from falling off also includes a first elastic component and a first limiting component; the first limiting component is disposed on the shaft part, and the first elastic component is disposed in the shaft receiving cavity and its two ends can respectively act on the shaft cavity partition and the first limiting component; The inner sleeve includes a front sleeve section and a rear sleeve section; the front sleeve section is located in the front sleeve cavity and can be blocked by the sleeve cavity partition, and the rear sleeve section is located in the rear sleeve cavity. The double-stroke sleeve that will not lose screws also includes a second elastic component and a second limiting component; the second limiting component is disposed on the rear sleeve section, and the second elastic component is disposed in the rear sleeve cavity and its two ends can respectively act on the sleeve cavity partition and the second limiting component. The double-stroke sleeve that prevents screws from falling off also includes several moving parts; these moving parts are located inside the locking hole.

[0006] Explanation of the dual-stroke principle: When the electric screwdriver shaft moves forward, it can compress the first elastic component through the first limiting component. After being compressed, the first elastic component will exert pressure on the partition of the screwdriver shaft cavity, thereby pushing the inner sleeve forward. When the screwdriver head reaches the locking hole of the screwdriver head movable cavity, the inner sleeve gradually enters the outer expansion section of the front sleeve cavity. Thus, the movable component is gradually squeezed out of the locking hole and into the outer expansion section of the front sleeve cavity. Finally, the outer end of the inner sleeve reaches the opening of the outer sleeve, and the screwdriver head simultaneously reaches the opening of the inner sleeve. At this time, a screw is inserted into the screw cap receiving groove of the screwdriver head and then the electric screwdriver shaft is loosened. The electric screwdriver shaft and the inner sleeve return to their rearward positions under the action of the first elastic component and the second elastic component, respectively. When the locking hole on the inner sleeve reaches the inner pressure section, the side wall of the inner pressure section of the outer sleeve will gradually press the movable component into the locking hole, thereby locking the screw radially. At the same time, the screwdriver head of the electric screwdriver shaft has left the locking hole. After the return is completed, the screw has been loaded and fixed. When screwing in a screw, the electric screwdriver drives the screwdriver shaft to rotate, and the screw gradually enters the building material, such as sheet metal. At the same time, the screwdriver shaft and the inner sleeve gradually move towards the front end of the outer sleeve. When the outer sleeve contacts and presses against the surface of the building material, the screw is in place. At this point, the moving parts are squeezed out of the inner sleeve by the screwdriver shaft and enter the outer expansion section of the front sleeve cavity, thus loosening the screw and completing the work.

[0007] Preferably, the screwdriver spindle has a screw cap receiving groove on the screwdriver head. The structure of the screw cap receiving groove is compatible with common screws, such as hexagonal nut grooves.

[0008] Preferably, the outer opening size of the locking hole is larger than the inner opening size. Further, the inner opening size of the locking hole is smaller than the diameter of the moving part, i.e., the steel ball.

[0009] Preferably, the diameter of the bit head is larger than the diameter of the bit shaft cavity partition.

[0010] Preferably, the diameter of the front sleeve section is larger than the diameter of the rear sleeve section; the diameter of the front sleeve section is larger than the inner diameter of the sleeve cavity partition.

[0011] Preferably, the first elastic component is a spring or a spring sheet; the first limiting component is a metal ring.

[0012] Preferably, the second elastic component is a spring or a sheet; the second limiting component is a metal ring.

[0013] Preferably, the moving part is a steel ball or a steel column.

[0014] Preferably, the outer diameter of the first limiting component is smaller than the diameter of the shaft receiving cavity; the outer diameter of the second limiting component is smaller than the diameter of the rear sleeve cavity.

[0015] Preferably, the diameter of the outer expansion section is larger than the diameter of the inner pressure section.

[0016] Beneficial technical effects: As described above, the double-stroke sleeve disclosed in this application, which prevents screws from falling out, can automatically move its moving parts between the inner and outer sleeves through double-stroke action to clamp or loosen screws. Compared with magnetic sleeves using magnetic components, it is not only less prone to wear or damage, but also has a stronger locking force and prevents screw twisting. Furthermore, it is easy to operate; simply pressing down and releasing the electric screwdriver spindle installs the screw, and turning on the electric screwdriver to tighten the screw automatically releases it, resulting in high precision and efficiency.

[0017] The technical solution and technical effects of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 First-person perspective 3D view of a double-stroke sleeve that won't lose screws; Figure 2 : A second-view stereoscopic image of a double-stroke sleeve that won't lose screws; Figure 3 : First-person exploded view of a double-stroke sleeve that won't lose screws; Figure 4 : A second-view exploded view of a double-stroke sleeve that won't lose screws; Figure 5 Perspective view of the outer sleeve structure; Figure 6Perspective view of the inner sleeve structure; Figure 7 Perspective view of the electric screwdriver shaft structure; Figure 8 Assembly drawing of a double-stroke sleeve component that will not lose screws; Figure 9 : Schematic diagram of the stroke of a double-stroke sleeve that will not lose screws; Icon description: 1-Outer sleeve, 11-Front sleeve cavity, 12-Rear sleeve cavity, 13-Sleeve cavity partition; 111-Outer expansion section, 112-Inner pressure section; 2-Inner sleeve, 21-Bit moving cavity, 22-Shaft housing cavity, 23-Bit shaft cavity partition, 24-Locking hole, 25-Front sleeve section, 26-Rear sleeve section; 3-Electric screwdriver spindle, 31-Screwdriver head, 32-Spindle shaft, 33-Connecting part, 34-Screw cap receiving groove; 4-First elastic component; 5-First limiting component; 6-Second elastic component; 7-Second limiting component; 8-Moving parts. Detailed Implementation

[0019] Please see Figures 1 to 8 The double-stroke sleeve that will not lose screws disclosed in this application includes an outer sleeve 1, an inner sleeve 2, an electric screwdriver shaft 3, a first elastic component 4, a first limiting component 5, a second elastic component 6, a second limiting component 7, and a movable component.

[0020] Among them: the first elastic component 4 and the second elastic component 6 are both springs; the first limiting component 5 and the second limiting component 7 are both metal rings; and the movable component 8 is a steel ball.

[0021] The outer sleeve 1 is provided with a front sleeve cavity 11 and a rear sleeve cavity 12 arranged sequentially from front to back; a sleeve cavity partition 13 is provided between the front sleeve cavity 11 and the rear sleeve cavity 12; the front sleeve cavity 11 includes an outer expansion section 111 and an inner pressure section 112; the diameter of the outer expansion section 111 is larger than the diameter of the inner pressure section 112.

[0022] The inner sleeve 2 is provided with a bit moving cavity 21 and a shaft receiving cavity 22 arranged sequentially from front to back; a bit shaft cavity partition 23 is provided between the bit moving cavity 21 and the shaft receiving cavity 22; a number of evenly distributed locking holes 24 are provided on the side wall of the bit moving cavity 21; the external opening size of the locking hole 24 is larger than the internal opening size.

[0023] The inner sleeve 2 includes a front sleeve section 25 and a rear sleeve section 26; the diameter of the front sleeve section 25 is larger than the diameter of the rear sleeve section 26; and the diameter of the front sleeve section 25 is larger than the inner diameter of the sleeve cavity partition 13.

[0024] The electric screwdriver spindle 3 includes a screwdriver head 31, a shaft portion 32, and a connecting portion 33. The screwdriver head 31 of the electric screwdriver spindle 3 is provided with a screw cap receiving groove 34, which is a hexagonal screw cap groove. The connecting portion 33 of the electric screwdriver spindle 3 is provided with a corresponding connecting structure for connecting the electric screwdriver. The diameter of the screwdriver head 31 is larger than the diameter of the screwdriver spindle cavity partition portion 23.

[0025] The screwdriver head 31 of the electric screwdriver spindle 3 is disposed within the screwdriver head movable cavity 21 and can be blocked by the screwdriver spindle cavity partition 23. The shaft portion 32 passes through and is accommodated within the shaft receiving cavity 22, and the connecting portion 33 extends out of the shaft receiving cavity 22. A first limiting member 5 is disposed on the shaft portion 32, and a first elastic member 4 is disposed within the shaft receiving cavity 22, with both ends capable of acting on the screwdriver spindle cavity partition 23 and the first limiting member 5, respectively. The outer diameter of the first limiting member 5 is smaller than the diameter of the shaft receiving cavity 22.

[0026] The front sleeve section 25 of the inner sleeve 2 is disposed within the front sleeve cavity 11 and can be blocked by the sleeve cavity partition 13, while the rear sleeve section 26 is disposed within the rear sleeve cavity 12. A second limiting member 7 is disposed on the rear sleeve section 26, and a second elastic member 6 is disposed within the rear sleeve cavity 12, with both ends capable of acting on the sleeve cavity partition 13 and the second limiting member 7, respectively. The outer diameter of the second limiting member 7 is smaller than the diameter of the rear sleeve cavity 12.

[0027] Several movable parts 8 are respectively installed in the corresponding locking holes 24.

[0028] Explanation of the dual-stroke principle: The double-stroke sleeve is fixedly connected to the power output end of the electric screwdriver via the connecting part 33.

[0029] STEP01: When screwing in a screw, pressure is applied to the screwdriver shaft 3 by the electric screwdriver; when the electric screwdriver shaft 3 moves forward, it can compress the first elastic member 4 through the first limiting member 5; after being compressed, the first elastic member 4 will exert pressure on the screwdriver shaft cavity partition 23, thereby pushing the inner sleeve 2 to move forward together. When the bit head 31 reaches the locking hole 24 of the bit moving cavity 21, the inner sleeve 2 gradually enters the outer expansion section 111 of the front sleeve cavity 11; thus, the moving part 8 is gradually squeezed out of the locking hole 24 and enters the outer expansion section 111 of the front sleeve cavity 11; finally, the outer end of the inner sleeve 2 reaches the opening of the outer sleeve 1, and the bit head 31 simultaneously reaches the opening of the inner sleeve 2. At this point, a screw is inserted into the screw cap receiving groove 34 of the screwdriver head 31, and then the electric screwdriver shaft 3 is loosened; the electric screwdriver shaft 3 and the inner sleeve 2 return to their original positions under the action of the first elastic component 4 and the second elastic component 6, respectively; when the locking hole 24 on the inner sleeve 2 reaches the inner pressure section 112 of the front sleeve cavity 11, the side wall of the inner pressure section 112 of the outer sleeve will gradually press the movable component 8 into the locking hole 24, thereby locking the screw from the radial direction of the screw; at the same time, the screwdriver head 31 of the electric screwdriver shaft 3 has left the locking hole 24 position; after the return is completed, the screw has been loaded and fixed. STEP02: When screwing in a screw, the electric screwdriver drives the screwdriver shaft 3 to rotate, and the screw gradually enters the building material, such as sheet metal. At the same time, the screwdriver shaft 3 and the inner sleeve 2 gradually move towards the front end of the outer sleeve 1. When the outer sleeve 1 contacts and presses against the surface of the building material, the screw is in place. At this time, the moving part 8 is squeezed out of the inner sleeve 2 by the screwdriver shaft 3 and enters the outer expansion section 111 of the front sleeve cavity 11. Loosen the screw and continue to load the next screw.

[0030] Therefore, the double-stroke socket disclosed in this application, which prevents screws from falling out, can automatically clamp or loosen screws through its double-stroke action. Compared with magnetic sockets, it is less prone to wear or damage and prevents screws from becoming misaligned. Furthermore, it is easy to operate; when installing screws, simply holding the electric screwdriver and pressing down and releasing the screwdriver shaft will install the screw; when tightening screws, starting the electric screwdriver will automatically loosen the screw, resulting in high precision and efficiency.

[0031] The technical solutions and effects of this application have been described in detail above with reference to the accompanying drawings and specific embodiments. It should be noted that those skilled in the art can develop other embodiments based on this. Any simple modifications and equivalent substitutions that do not depart from the innovative concept of this application are covered by this application and fall within the protection scope of this patent.

Claims

1. A double-stroke sleeve that prevents screws from falling off, characterized in that: Includes outer sleeve (1), inner sleeve (2), and electric screwdriver shaft (3); The outer sleeve (1) is provided with a front sleeve cavity (11) and a rear sleeve cavity (12) from front to back; a sleeve cavity partition (13) is provided between the front sleeve cavity (11) and the rear sleeve cavity (12); the front sleeve cavity (11) includes an outer expansion section (111) and an inner pressure section (112). The inner sleeve (2) is provided with a bit moving cavity (21) and a shaft receiving cavity (22) in sequence from front to back; a bit shaft cavity partition (23) is provided between the bit moving cavity (21) and the shaft receiving cavity (22); a number of locking holes (24) are provided on the side wall of the bit moving cavity (21). The electric screwdriver shaft (3) includes a screwdriver head (31), a shaft part (32), and a connecting part (33). The screwdriver head (31) of the electric screwdriver spindle (3) is disposed in the screwdriver head movable cavity (21) and can be blocked by the screwdriver spindle cavity partition (23). The shaft part (32) passes through and is accommodated in the shaft accommodating cavity (22). The connecting part (33) extends out of the shaft accommodating cavity (22). The double-stroke sleeve that will not lose screws also includes a first elastic component (4) and a first limiting component (5); The first limiting component (5) is disposed on the shaft part (32), and the first elastic component (4) is disposed in the shaft receiving cavity (22) and its two ends can respectively act on the shaft cavity partition part (23) and the first limiting component (5). The inner sleeve (2) includes a front sleeve section (25) and a rear sleeve section (26); The front sleeve section (25) is disposed in the front sleeve cavity (11) and can be blocked by the sleeve cavity partition (13), and the rear sleeve section (26) is disposed in the rear sleeve cavity (12); The double-stroke sleeve that will not lose screws also includes a second elastic component (6) and a second limiting component (7). The second limiting component (7) is disposed on the rear sleeve section (26), and the second elastic component (6) is disposed in the rear sleeve cavity (12) and its two ends can respectively act on the sleeve cavity partition (13) and the second limiting component (7). The double-stroke sleeve that will not lose screws also includes several moving parts (8); The movable part (8) is disposed within the locking hole (24).

2. The double-stroke sleeve that will not lose screws according to claim 1, characterized in that: The screwdriver head (31) of the electric screwdriver shaft (3) is provided with a screw cap receiving groove (34).

3. The double-stroke sleeve that will not lose screws according to claim 1, characterized in that: The external opening size of the locking hole (24) is larger than the internal opening size.

4. The double-stroke sleeve that prevents screws from falling off according to claim 1, characterized in that: The diameter of the batch head (31) is larger than the diameter of the batch shaft cavity partition (23).

5. The double-stroke sleeve that will not lose screws according to claim 1, characterized in that: The diameter of the front sleeve section (25) is larger than the diameter of the rear sleeve section (26); The diameter of the front sleeve section (25) is greater than the inner diameter of the sleeve cavity partition (13).

6. The double-stroke sleeve that prevents screws from falling off according to claim 1, characterized in that: The first elastic component (4) is a spring or a sheet spring; The first limiting component (5) is a metal ring.

7. The double-stroke sleeve that will not lose screws according to claim 1, characterized in that: The second elastic component (6) is a spring or a sheet spring; The second limiting component (7) is a metal ring.

8. The double-stroke sleeve that will not lose screws according to claim 1, characterized in that: The movable part (8) is a steel ball or a steel column.

9. The double-stroke sleeve that will not lose screws according to claim 1, characterized in that: The outer diameter of the first limiting component (5) is smaller than the diameter of the shaft receiving cavity (22); The outer diameter of the second limiting component (7) is smaller than the diameter of the rear sleeve cavity (12).

10. The double-stroke sleeve that prevents screws from falling off according to claim 1, characterized in that: The diameter of the outer expansion section (111) is larger than the diameter of the inner pressure section (112).

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