Self-positioning type driving screw driver adaptive to screw rod

Abstract

The utility model discloses a self-positioning type driving screw driver matched with a screw rod. The screw rod is provided with an end, and a cross hole is formed in the end; the driving screwdriver is provided with a handle, a driving rod and a crosshead which is arranged at the end part of the driving rod and can be positioned and embedded into the cross hole, a positioning component which is connected with the end head and drives the end head to be coaxial with the crosshead is arranged on the driving rod, and the positioning component can axially move relative to the crosshead. The positioning component is a positioning cylinder which is axially and slidably arranged on the driving rod in a sleeving mode and wraps the crosshead in the annular direction, the end can be axially embedded into the positioning cylinder, and the side wall of the end is close to the inner wall of the positioning cylinder. The screw rod and the driving screw driver can be driven to be connected and coaxial through the positioning component, then the screw rod can be driven to be aligned with the threaded hole through the driving screw driver, and the problem that at present, manual supporting is needed is solved. And due to the moving structure of the positioning component, the positioning component can axially move on the driving rod and is separated from the crosshead and the end head of the screw rod, so that the screw rod is completely fastened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of screw assembly, in particular to a self-positioning driving driver adapted to a screw. BACKGROUND

[0002] The screw has a head, and a cross hole is formed in the head, as shown in the structure of Fig. 1-2 For small-sized screws, in order to improve the driving force during assembly, a polygonal hole is formed in the head, as shown in the structure of Fig. 2 which can increase the contact area with the driving driver adapted to the screw, thereby facilitating the driving assembly of the screw. The driving driver adapted to the screw assembly is shown in Fig. 3 which has a handle, a driving rod, and a cross head provided at the end of the driving rod and capable of being positioned and embedded into the cross hole. During the assembly of the screw, the operator holds the handle of the driving driver, then aligns the screw to be assembled with the driving driver, as shown in Fig. 3 then embeds the cross head of the driving driver into the cross hole of the screw, and then rotates the driving driver to achieve the assembly of the screw (with the adapted internal threaded hole). The reverse rotation of the driving driver can achieve the disassembly of the screw.

[0003] However, during the assembly of the screw by the driving driver, the operator needs to hold the screw (as shown by the vertical arrow in Fig. 4 ) to be coaxial with the threaded hole before the head of the screw is rotated and matched with the threaded hole. In this alignment state, the screw can be smoothly rotated into the threaded hole. However, during manual holding, there is usually an axial deviation, as shown in Fig. 4 which makes it difficult to smoothly rotate the screw into the threaded hole. If the assembly continues, it will cause damage to the external threads on the screw and the internal threads in the threaded hole, affecting the fastening effect in the later period. Meanwhile, when the threads on the screw are fine threads, the alignment and thread matching of the screw and the threaded hole are further increased, which not only easily causes damage to the threads, but also affects the assembly efficiency.

[0004] In actual operation, the component with internal threads that is fastened with the screw also needs to be held and stabilized during the screw fastening, so the operation difficulty of the screw fastening assembly is further increased. SUMMARY

[0005] In view of the above problems, the present application aims to provide a self-positioning driving driver adapted to a screw, which can drive the screw and the driving driver to be connected and coaxial, thereby aligning the screw and the threaded hole by the driving driver, solving the current manual holding operation, and solving the problem of damage to the external threads of the screw and the internal threads of the threaded hole caused by the axial deviation of the manually held screw.

[0006] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows: a self-positioning type driving screwdriver suitable for a screw rod, the screw rod having a head, a cross hole being formed in the head; the driving screwdriver having a handle, a driving rod, and a cross head provided at the end of the driving rod and capable of being positioned and embedded into the cross hole, characterized in that: a positioning member is arranged on the driving rod and connected with the head and drives the head and the cross head to be coaxial, and the positioning member is axially movable compared with the cross head.

[0007] Preferably, the positioning member is a positioning cylinder which is axially sleeved on the driving rod and circumferentially covers the cross head, the head can be axially embedded into the positioning cylinder, and the side wall of the head is close to the inner wall of the positioning cylinder.

[0008] Preferably, a positioning plate is fixedly arranged on the driving rod at the rear side of the positioning cylinder, and a return spring is arranged between the positioning plate and the positioning cylinder and sleeved on the driving rod.

[0009] Preferably, the inner wall of the positioning cylinder is provided with a tapered port structure at the port.

[0010] The beneficial effects of the present application are: the positioning member can drive the screw rod and the driving screwdriver to be connected and coaxial, and then the driving screwdriver can drive the screw rod and the threaded hole to be aligned, solving the current manual operation that needs to be supported. The movement structure of the positioning member can make the positioning member axially move on the driving rod and be separated from the cross head and the head of the screw rod, so as to realize the complete fastening of the screw rod. BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1 It is a structure diagram of the screw rod.

[0012] Fig. 2 It is a structure diagram of the head.

[0013] Fig. 3 It is a diagram showing the current assembly operation of the screw rod by the driving screwdriver.

[0014] Fig. 4 It is a diagram showing the current assembly operation of the screw rod by the driving screwdriver. Fig. 3 It is a diagram showing the current assembly operation of the screw rod by the driving screwdriver.

[0015] Fig. 5 It is a structure diagram of the self-positioning type driving screwdriver of the present application.

[0016] Fig. 6 It is a diagram showing that the screw rod is embedded into the positioning cylinder of the driving screwdriver.

[0017] Fig. 7 It is a diagram showing the screw rod assembly of the self-positioning type driving screwdriver of the present application.

[0018] Fig. 8For the purpose of this application Fig. 7 The diagram shows how to gradually tighten the screw.

[0019] Fig. 9 This illustration shows the screw end being embedded into the positioning cylinder for this application. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions of this application will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] See attached document Fig. 1-9 The diagram shows a self-positioning drive screwdriver adapted to a screw rod. The screw rod 1 has an end 11, in which a cross-shaped hole 1a is formed, such as... Fig. 2 The structure shown is as follows. Currently, the drive screwdriver 2 adapted for screw 1 assembly is as follows: Fig. 3 As shown, the screwdriver 2 has a handle 21, a drive rod 22, and a crosshead 23 at the end of the drive rod 22 that can be positioned and inserted into the crosshead hole 1a. When assembling the screw 1, the operator holds the handle 21 of the drive screwdriver 2, then aligns the screw 1 to be assembled with the drive screwdriver 2, and then inserts the crosshead 23 of the drive screwdriver 2 into the crosshead hole 1a of the screw 1. By rotating the drive screwdriver 2, the screw 1 (with the matching internal thread hole) can be assembled. Reverse rotation of the drive screwdriver 2 can disassemble the screw 1.

[0022] To address the current issues of requiring operator support during screw assembly and the difficulty in smoothly performing assembly operations due to axial misalignment, such as... Fig. 7 As shown, this application provides a positioning component on the drive rod 22 that connects to the end 11 and drives the end 11 to be coaxial with the crosshead 23, and this positioning component is axially movable relative to the crosshead 23. During operation, the cross hole 1a of the screw 1 is nested into the crosshead 23 of the drive screwdriver 2. Simultaneously, the positioning component drives the screw 1 to connect and be coaxial with the drive screwdriver 2, thereby allowing the drive screwdriver 2 to align the screw 1 with the threaded hole, solving the current problem of requiring manual support during operation.

[0023] Since the positioning member is connected to the screw 1, and the screw 1 needs to be detached from the positioning member in the fully tightened state, the positioning member can move axially on the drive rod 22 and detach from the crosshead 23 and the end 11 of the screw 1 under the action of axial movement relative to the crosshead 23, thereby achieving full tightening of the screw 1.

[0024] Specifically, such as Fig. 5-6As shown, the positioning member is a positioning cylinder 3 axially slidingly sleeved on the driving rod 22 and circumferentially covering the cross head 23, the end head 11 can be axially embedded into the positioning cylinder 3, and the side wall of the end head 11 is close to the inner wall of the positioning cylinder 3, that is, the gap between the side wall of the end head 11 and the inner wall of the positioning cylinder 3 is smaller than the axial width of the side wall of the end head 11, preferably, a gap of about 1-2 mm is reserved between the side wall of the end head 11 and the inner wall of the positioning cylinder 3, so that the end head 11 can be smoothly embedded into the positioning cylinder 3, and under this structure, the end head 11 can be positioned after being embedded into the positioning cylinder 3, avoiding the axial deflection of the end head 11 in the positioning cylinder 3. When operating, as shown in Fig. 8 As shown, the positioning cylinder 3 is slid on the driving rod 22, so that the cross head 23 is retracted into the positioning cylinder 3, then the end head 11 of the screw rod 1 is embedded from the port of the positioning cylinder 3, and the screw rod 1 is rotated, so that the cross head 23 is embedded into the cross hole 1a of the end head 11, that is, the screw rod 1 is connected to the driving screwdriver 2, solving the current operation that the operator needs to hold the screw rod 1, and then the screw rod 1 can be aligned with the threaded hole by the driving screwdriver 2 for rotation assembly.

[0025] In order to further solve the operation that the operator needs to frequently slide the positioning cylinder 3 axially, as shown in Fig. 5-6 , 8, a positioning plate 4 is fixedly arranged on the driving rod 22 at the rear side of the positioning cylinder 3, and a return spring 5 is arranged between the positioning plate 4 and the positioning cylinder 3 and is sleeved on the driving rod 22. Before operation, the positioning cylinder 3 is driven to slide to the outside of the cross head 23 by the action of the return spring 5, so that the end head 11 can be embedded into the positioning cylinder 3 and the cross head 23, and then the screw rod 1 is rotated for assembly by the driving screwdriver 2. When the port of the positioning cylinder 3 contacts the port of the threaded hole (as shown in the state), Fig. 8 , continue to rotate the driving screwdriver 2, compress the return spring 5 by the positioning plate 4, and further axially advance the cross head 23 and the end head 11 (as shown in the state), Fig. 8 , so that the screw rod 1 can be completely fastened. After assembly is completed, the positioning cylinder 3 is driven to the outside of the cross head 23 again by the return spring 5 for embedding and assembly of the next screw rod 1.

[0026] Since the end head 11 is close to the inner wall of the positioning cylinder 3 (with a small gap for axial positioning), in order to facilitate the smooth embedding of the end head 11 of the screw rod 1 into the positioning cylinder 3, as shown in Fig. 9 , a tapered port structure is arranged at the port of the inner wall of the positioning cylinder 3. The tapered port structure increases the inner diameter of the outer port of the positioning cylinder 3, so that the end head 11 can be embedded into the positioning cylinder 3, and then can be smoothly embedded into the positioning cylinder 3, realizing the rapid embedding assembly of the end head 11 and improving the operation efficiency of the continuous assembly of the screw rod 1.

[0027] The principle of the present application is: the driving screwdriver 2 in use, the end head 11 of the screw rod 1 is embedded into the positioning cylinder 3, and the screw rod 1 is rotated, so that the cross hole 1a on the end head is nested on the cross head 23 of the driving screwdriver 2, and then the screw rod 1 is driven by the driving screwdriver 2 to be opposite to the internal threaded hole, and then the screw rod 1 is assembled in the internal threaded hole through the rotation of the driving screwdriver 2. When the port of the positioning cylinder 3 is in contact with the port of the threaded hole, the driving screwdriver 2 is continuously rotated, the reset spring 5 is compressed by the positioning plate 4, the cross head 23 and the end head 11 further axially travel, and then the complete fastening of the screw rod 1 can be realized. After the assembly is completed, the positioning cylinder 3 is driven by the reset spring 5 to be stretched out to the outside of the cross head 23 again, and the embedding and assembly of the next screw rod 1 are carried out.

[0028] The basic principle, main features and advantages of the present application are shown and described above. There are various changes and improvements of the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application.

Claims

1. A self-positioning driver adapted to a screw rod, the screw rod (1) having a tip (11) in which a cross hole (la) is formed; the driver (2) having a handle (21), a driving rod (22) and a cross head (23) provided at the end of the driving rod (22) and capable of being positioned and embedded into the cross hole (la), characterized in that: A positioning member is arranged on the driving rod (22) and connected with the end head (11) and drives the end head (11) to be coaxial with the cross head (23), and the positioning member is axially movable compared with the cross head (23).

2. A driver according to claim 1, wherein: The positioning member is a positioning cylinder (3) which is axially slidably sleeved on the driving rod (22) and circumferentially covers the cross head (23), the end head (11) can be axially embedded into the positioning cylinder (3), and the side wall of the end head (11) is close to the inner wall of the positioning cylinder (3).

3. A driver according to claim 2, wherein: A positioning plate (4) is fixedly arranged on the driving rod (22) at the rear side of the positioning cylinder (3), and a return spring (5) is arranged between the positioning plate (4) and the positioning cylinder (3) and is sleeved on the driving rod (22).

4. The drive spoon according to claim 3, wherein: The inner wall port of the positioning cylinder (3) is arranged as a tapered port structure.

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