Handheld screw fastening device

Abstract

The utility model relates to the technical field of fastening devices, in particular to a handheld screw fastening device which comprises a pressing plate, a connecting rod nut and a cutter bar, the pressing plate is fixedly connected with the connecting rod nut through a screw, one end of the cutter bar is rotatably provided with a rotary connecting disc, and the rotary connecting disc is connected with the pressing plate through a reset spring. A ball is arranged between the cutter bar and the connecting rod nut, the cutter bar and the connecting rod nut jointly form a ball-like screw nut pair, the other end of the cutter bar is magnetically connected with a magnetic suction cutter head, a pressing type clamping and positioning assembly is installed on the connecting rod nut, and one end of the pressing type clamping and positioning assembly corresponds to an embedded clamping groove formed in the cutter bar. According to the device, linear pressing force can be efficiently converted into rotating power, the screw fastening efficiency and precision are greatly improved, meanwhile, the screw can be fastened, the problem that the device cannot be used due to damage of internal parts is solved, and the using flexibility and convenience are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a handheld screw fastening device belongs to fastening device technical field. BACKGROUND

[0002] The handheld screw fastening device is a kind of efficient, portable fastening tool, mainly used for the fastening operation of various screws. It is usually composed of handle part and screw fastening part, and the clamping and fastening of screw are realized by motor drive or manual operation. The device has the characteristics of simple operation, flexibility and high efficiency, and is widely used in electronic product manufacturing, automobile repair, aerospace and other fields, which can greatly improve the efficiency and accuracy of screw fastening, reduce the difficulty and time cost of manual operation.

[0003] However, the traditional handheld screw fastening device mainly takes screwdriver as the main type, and the common ones can be divided into one type, cross type, hexagonal head type and star type according to the head type. Different types of screwdrivers are selected according to different work requirements during use to meet the needs of production work. At present, most of the screw fastening devices on the market are used by the external force of the operator to rotate the bit of the screwdriver to drive the screw to rotate, so that the screw thread pair is further engaged to achieve the purpose of fastening. When the installation space is relatively narrow, the operator may not be able to rotate the screwdriver handle, so that the screw cannot be fastened or disassembled, the use is limited, and different use requirements cannot be met, and there are certain disadvantages in the use process.

[0004] Therefore, the utility model is proposed. UTILITY MODEL CONTENT

[0005] The utility model aims to solve the above problems and provides a handheld screw fastening device, which has the advantages of efficiently converting linear pressing force into rotary power, greatly improving the efficiency and precision of screw fastening, and can also realize the fastening of screw, avoiding the problem of unable to use caused by damage of internal parts, and improving the flexibility and convenience of use.

[0006] The utility model realizes the above-mentioned purpose by the following technical scheme, a kind of handheld screw fastening device, including pressing plate, connecting rod nut and cutter bar, the pressing plate is fixedly connected with the connecting rod nut by screw, the cutter bar one end is rotatably installed with the rotary connecting disc, the rotary connecting disc is connected with the pressing plate by the reset spring, the cutter bar and the connecting rod nut are provided with the ball bearing, and jointly constitute the ball screw nut pair, the cutter bar other end is magnetically connected with the magnetic suction bit, the connecting rod nut is installed with the pressing type clamping positioning assembly, the pressing type clamping positioning assembly one end corresponds with the embedding clamping slot opened on the cutter bar.

[0007] Further, in order to make the movement of the cutter bar more smooth through the ball, and facilitate the disassembly of the magnetic cutter head, the outer circumferential surface of the cutter bar is provided with a circular spiral groove, the inner surface of the connecting rod nut is also provided with a circular spiral groove, the ball is rolled and clamped in the circular spiral groove, and the lower end of the cutter bar is designed with an internal hexagonal hole slot, and the magnetic cutter head is connected through magnetic force.

[0008] Further, in order to fix the circular base plate and the connecting rod nut through the fixed embedding part, the pressing type clamping positioning assembly comprises the fixed embedding part, the fixed embedding part is fixedly inserted on the connecting rod nut, and the circular base plate is fixedly installed on the fixed embedding part.

[0009] Further, in order to make the first positioning clamping block and the second positioning clamping block rotate on the hinged block through the rotating shaft, the extension connecting strip is fixedly installed on the inner wall of the circular base plate, one end of the extension connecting strip is fixed with the hinged block, the first positioning clamping block and the second positioning clamping block are installed on the hinged block, and the first positioning clamping block and the second positioning clamping block are rotatably connected with both ends of the hinged block through the rotating shaft.

[0010] Further, in order to fix the cutter bar through the first positioning clamping block and the second positioning clamping block, the first positioning clamping block and the second positioning clamping block are symmetrically distributed, one end of the first positioning clamping block and the second positioning clamping block corresponds to the embedding clamping groove, and the first positioning clamping block and the second positioning clamping block are connected through the connecting spring.

[0011] Further, in order to make the annular pushing block slide on the circular base plate through the advancing slide rod, the advancing slide rod is slidingly inserted into the circular base plate, and one end of the advancing slide rod is fixedly installed with the annular pushing block.

[0012] Further, in order to extrude the first positioning clamping block and the second positioning clamping block through the annular pushing block, one end of the first positioning clamping block and the second positioning clamping block is located inside the annular pushing block.

[0013] Further, in order to make the advancing slide rod slide on the circular base plate through the pressing positioning head, the other end of the advancing slide rod is fixedly installed with the pressing positioning head.

[0014] The technical effects and advantages of the utility model are: through the design of the ball screw nut pair, linear pressing force is efficiently converted into rotary power, the efficiency and precision of screw fastening are greatly improved; through simple pressing operation, the positioning of the tool bar by the pressing type clamping positioning assembly is realized, the overall rotation is controlled, the fastening of the screw is also realized, the problem of unable to use caused by internal part damage is avoided, the flexibility and convenience of use are improved, and diversified screw fastening requirements are met. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the overall structure schematic view of the utility model;

[0016] Figure 2 It is the connecting structure schematic view of the tool bar and the pressing plate of the utility model;

[0017] Figure 3 It is the installation structure schematic view of the circular base plate of the utility model;

[0018] Figure 4 It is the connecting structure schematic view of the first positioning clamping block and the second positioning clamping block of the utility model;

[0019] Figure 5 It is the installation structure schematic view of the annular pushing block of the utility model;

[0020] In the drawing: 1, pressing plate; 2, connecting rod nut; 3, tool bar; 4, rotary connecting disc; 5, return spring; 6, ball; 7, magnetic suction tool bit; 8, pressing type clamping positioning assembly; 801, fixed embedding part; 802, circular base plate; 803, extension connecting strip; 804, hinged block; 805, first positioning clamping block; 806, second positioning clamping block; 807, rotary shaft; 808, connecting spring; 809, pushing slide rod; 810, annular pushing block; 811, pressing positioning head. DETAILED DESCRIPTION

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

[0022] Please refer to Figures 1-5As shown, a handheld screw fastening device comprises a pressing plate 1, a connecting rod nut 2 and a cutter bar 3, the pressing plate 1 is fixedly connected with the connecting rod nut 2 through a screw, the cutter bar 3 is rotatably installed with a rotary connecting disc 4 at one end, the rotary connecting disc 4 is connected with the pressing plate 1 through a reset spring 5, a ball 6 is arranged between the cutter bar 3 and the connecting rod nut 2, and together they constitute a ball screw nut pair, a magnetic suction cutter head 7 is magnetically connected to the other end of the cutter bar 3, a pressing type clamping positioning assembly 8 is installed on the connecting rod nut 2, one end of the pressing type clamping positioning assembly 8 corresponds to the embedded clamping groove opened on the cutter bar 3, and when in use, the pressing plate 1 is pressed with force, this action is transmitted to the cutter bar 3 through the connecting rod nut 2, at the same time, the ball 6 rolls between the cutter bar 3 and the connecting rod nut 2, forming a transmission effect similar to a ball screw, efficiently converting linear thrust into rotary force, realizing the fastening of the screw in place, and through the pressing of the pressing type clamping positioning assembly 8 by the fingers, one end thereof corresponds to and is clamped with the embedded clamping groove pre-designed on the cutter bar 3, ensuring that the cutter bar 3 is stable and does not shake, and through the overall rotation, the fastening of the screw can also be realized, avoiding the problem of being unable to use due to damage of internal parts, and being more flexible and convenient to use, meeting different use requirements.

[0023] The outer circumferential surface of the cutter bar 3 has a circular spiral groove, the inner surface of the connecting rod nut 2 is also provided with a circular spiral groove, the ball 6 is rollingly clamped in the circular spiral groove, and the lower end of the cutter bar 3 is designed with an internal hexagonal hole groove, and the magnetic suction cutter head 7 is magnetically connected thereto, in use, the magnetic suction cutter head 7 is magnetically attracted to the internal hexagonal hole groove at the lower end of the cutter bar 3, aligns with the screw, holds the pressing plate 1 and the connecting rod nut 2 tightly, and through the rolling clamping of the ball 6 in the circular spiral groove between the connecting rod nut 2 and the cutter bar 3, efficient transmission is realized, with the pressing plate 1 exerting force, the ball 6 advances along the spiral path, driving the cutter bar 3 and the magnetic suction cutter head 7 to rotate and penetrate, until the screw is fastened.

[0024] The pressing type clamping positioning assembly 8 comprises a fixed embedding part 801 fixedly inserted on the connecting rod nut 2, a circular base plate 802 fixedly installed on the fixed embedding part 801, an extension connecting strip 803 fixedly installed on the inner wall of the circular base plate 802, a hinged block 804 fixed at one end of the extension connecting strip 803, a first positioning clamping block 805 and a second positioning clamping block 806 installed on the hinged block 804, the first positioning clamping block 805 and the second positioning clamping block 806 being rotatably connected with both ends of the hinged block 804 through a rotating shaft 807, the first positioning clamping block 805 and the second positioning clamping block 806 being symmetrically distributed, one end of the first positioning clamping block 805 and the second positioning clamping block 806 corresponding to the embedded clamping groove, and the first positioning clamping block 805 and the second positioning clamping block 806 being connected through a connecting spring 808, a pushing sliding rod 809 being slidingly inserted on the circular base plate 802, an annular pushing block 810 being fixedly installed at one end of the pushing sliding rod 809, one end of the first positioning clamping block 805 and the second positioning clamping block 806 being located inside the annular pushing block 810, and a pressing positioning head 811 being fixedly installed at the other end of the pushing sliding rod 809, in use, the magnetic attraction tool bit 7 is connected to the lower end of the tool bar 3 through magnetic force, then the pressing plate 1 and the connecting rod nut 2 are held and pressed, and the pressing positioning head 811 is pressed with fingers, so that the pushing sliding rod 809 drives the annular pushing block 810 to slide, and then the first positioning clamping block 805 and the second positioning clamping block 806 are driven to rotate inwards through the rotating shaft 807 to press the connecting spring 808, the embedded clamping groove on the tool bar 3 is aligned with the position of the first positioning clamping block 805 and the second positioning clamping block 806, so that the first positioning clamping block 805 and the second positioning clamping block 806 are clamped into the embedded clamping groove, so as to stabilize the tool bar 3, and the overall rotation can realize the fastening of the screw, and when the pressing positioning head 811 is loosened, the first positioning clamping block 805 and the second positioning clamping block 806 are separated from the embedded clamping groove under the action of the connecting spring 808, so as to enable the tool bar 3 to rotate, and the operation mode can be flexibly switched, and the use is more flexible.

[0025] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as exemplary and non-restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended to encompass all changes falling within the meaning and scope of the equivalent elements of the claims. Any reference signs in the claims should not be considered as limiting the claims to which they relate.

[0026] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature described. The specification can include implicit combinations of explicitly mentioned features and / or explicit combinations of implicitely mentioned features. Each embodiment depends on the explicit combinations of features and / or the implicit combinations of features made specifically within that embodiment, and each such embodiment can be combined with every other such embodiment to create further embodiments.

Claims

1. A hand-held screw fastening device comprising a pressing plate (1), a connecting rod nut (2) and a knife bar (3), characterized in that: The pressing plate (1) is fixedly connected with the connecting rod nut (2) through screws, one end of the cutter bar (3) is rotatably installed with a rotary connecting disc (4), the rotary connecting disc (4) is connected with the pressing plate (1) through a reset spring (5), the cutter bar (3) and the connecting rod nut (2) are provided with a ball (6) therebetween and jointly constitute a ball screw nut pair, the other end of the cutter bar (3) is magnetically connected with a magnetic suction cutter head (7), the connecting rod nut (2) is installed with a pressing type clamping positioning assembly (8), one end of the pressing type clamping positioning assembly (8) corresponds to an embedded clamping groove formed in the cutter bar (3).

2. The hand held screw fastening apparatus according to claim 1, wherein: The cutter bar (3) has a circular spiral groove on the outer circumferential surface, the connecting rod nut (2) is also provided with a circular spiral groove on the inner surface, the ball (6) is clamped and rolled in the circular spiral groove, and the lower end of the cutter bar (3) is designed with an internal hexagonal groove and is connected with the magnetic suction cutter head (7) through magnetic force.

3. The hand held screw fastening apparatus of claim 1 wherein: The pressing type clamping positioning assembly (8) comprises a fixed embedded part (801), the fixed embedded part (801) is fixedly inserted into the connecting rod nut (2), and a circular base plate (802) is fixedly installed on the fixed embedded part (801).

4. The hand held screw fastening apparatus of claim 3 wherein: An extension connecting strip (803) is fixedly installed on the inner wall of the circular base plate (802), one end of the extension connecting strip (803) is fixedly provided with a hinged block (804), a first positioning clamping block (805) and a second positioning clamping block (806) are installed on the hinged block (804), and the first positioning clamping block (805) and the second positioning clamping block (806) are rotatably connected with both ends of the hinged block (804) through a rotating shaft (807).

5. The hand held screw fastening apparatus of claim 4 wherein: The first positioning clamping block (805) and the second positioning clamping block (806) are symmetrically distributed, one end of the first positioning clamping block (805) and the second positioning clamping block (806) corresponds to the embedded clamping groove, and the first positioning clamping block (805) and the second positioning clamping block (806) are connected through a connecting spring (808).

6. The hand held screw fastening apparatus of claim 5 wherein: A propelling sliding rod (809) is slidingly inserted into the circular base plate (802), and an annular pushing block (810) is fixedly installed at one end of the propelling sliding rod (809).

7. The hand held screw fastening apparatus of claim 6 wherein: One end of the first positioning clamping block (805) and the second positioning clamping block (806) is located inside the annular pushing block (810).

8. The hand held screw fastening apparatus of claim 7 wherein: A pressing positioning head (811) is fixedly installed at the other end of the propelling sliding rod (809).

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