An electric wrench

Abstract

The present invention discloses an electric wrench, belonging to the field of electric wrenches. The present invention includes a micro hydraulic push rod and an electric wrench. A motor is installed inside the electric wrench, a transmission gear is sleeved on the output shaft of the motor, a rotating rod is provided on the top of the electric wrench, a transition gear is sleeved on the rotating rod and meshed with the transmission gear, a square connecting block is sleeved on the middle of the rotating rod, a protective sleeve for installing a rotary cutter is fixed on one side of the square connecting block, a helical gear is fixed at one end of the rotating rod and installed on the protective sleeve, a gear of the same type and size as the helical gear is also installed at one end of the rotary cutter, and the two mesh together; wherein the top of the protective sleeve is set to be a plane without chamfers. The present invention makes further optimization on the electric wrench so that the electric wrench is not affected by the size ratio of the internal motor and the thickness of the protective shell when it is used. First, the protective sleeve on the electric wrench is optimized to be flat instead of arc-shaped to reduce the volume space.

Description

Technical Field

[0001] The invention relates to the field of electric wrenches, and in particular to an electric wrench. Background Art

[0002] Electric wrench is an electric tool for tightening and loosening bolts and nuts. It is a tool for tightening high-strength bolts. It is used for the initial tightening and final tightening of large hexagonal high-strength bolts installed in steel structure bridges, factory buildings, chemical industry, power generation equipment, and the initial tightening of torsion shear type high-strength bolts, as well as occasions with strict requirements on the torque or axial force of bolt fasteners.

[0003] In home decoration, it is usually necessary to drill holes in door frames and fix them with screws. However, existing electric wrenches cannot fix screws well at the corners of door frames. Due to the internal motor of the electric wrench, the outer shell is thick and will directly contact the door frame. The screwdriver cannot be perpendicular to the door frame near the corner, causing the screws to always tilt when drilling. In addition, on relatively high door frames, it is usually necessary to manually hold the screws while using an electric wrench to fix the door frame. In this way, the screws will not be accurately perpendicular to the door frame, and there will be errors in the manual work, resulting in the nut being tilted to the door frame after the screws are fixed to the door frame, resulting in a poor fixing effect. For this reason, we have proposed an electric wrench. Summary of the invention

[0004] In view of the above-mentioned technical deficiencies, an object of the present invention is to provide an electric wrench.

[0005] In order to solve the above technical problems, the present invention adopts the following technical scheme: the present invention provides an electric wrench, including a micro hydraulic push rod and an electric wrench body, a motor is installed inside the electric wrench body, a transmission gear is sleeved on the output shaft of the motor, a rotating rod is provided on the top of the electric wrench body, a transition gear is sleeved on the rotating rod and meshed with the transmission gear, a square connecting block is sleeved on the middle of the rotating rod, a protective sleeve for installing a rotary cutter is fixed on one side of the square connecting block, a bevel gear is fixed on one end of the rotating rod, a rotary cutter is rotatably installed on the protective sleeve, and a rotary cutter is also installed at one end of the rotary cutter The micro-hydraulic push rod is of the same type and size as the helical gear, and the two are meshed together; wherein the top of the protective cover is set to be a plane without chamfers; a limit assembly is sleeved on the micro-hydraulic push rod, and a plurality of limit holes are provided on the limit assembly, and a slide seat is movably sleeved on the micro-hydraulic push rod, and the slide seat is fixed to the limit assembly by a latch; a pair of first fixing rods are installed on one side of one end of the micro-hydraulic push rod near the limit assembly, and a pair of second fixing rods are installed on the other side of one end of the micro-hydraulic push rod, and the first fixing rod and the second fixing rod are used to fix the clamp, and the clamp includes a pair of fixing rods arranged on a pair of fixing rods through a threaded screw A claw hand is fixed between the first fixed rod and the second fixed rod, a plurality of guide rods are arranged at the chamfer inside the claw hand, and a rotating seat is arranged on the claw hand, each of the claw hands is provided with a through groove; each of the claw hands is provided with a first slide groove, and a second slide groove is provided on the top of the claw hand near the first slide groove. A driving push rod is installed inside the micro hydraulic push rod, and racks are installed on both sides of the inner wall of the driving push rod. A first rotating shaft is installed on the first slide groove through a screw rod, and a gear is sleeved on the first rotating shaft, and the gear is meshed with the rack; wherein the first rotating shaft is used for twisting wire, and The first rotating shaft drives the anti-skid component to compress and extrude the frame; each of the claws is equipped with a second rotating shaft, and the second rotating shaft is composed of two fixed rods and a round roller arranged between the ends of the fixed rods; it also includes a pair of clamps arranged on the micro hydraulic push rod for fixing the frame, and a pair of anti-skid components installed between the two clamps; the anti-skid component includes a fixed plate arranged on a rotating seat connected by a hinge, a plurality of damping plates arranged on the fixed plate, a plurality of spring plates arranged on the damping plate, and a twisted wire shaft arranged in the middle of one side of the fixed plate and adjacent to the second rotating shaft, and the spring plates are provided with anti-skid rubber.

[0006] Preferably, a fixing component for rotating and fixing the electric wrench body is installed on the micro hydraulic push rod.

[0007] Preferably, the fixing assembly includes a rotating mounting sleeve arranged at the bottom of the electric wrench body, a slip ring arranged at the bottom of the rotating mounting sleeve, a threaded limiting groove arranged at the top of the slide seat, and a spiral rod arranged at the bottom of the slip ring for matching the aperture of the threaded limiting groove.

[0008] Preferably, the claw hand is installed with a third rotating shaft on a side close to the fixed plate, and fixed clamping strips are installed at both ends of the third rotating shaft, and the fixed clamping strips are fixed to the fixed plate by threaded screws.

[0009] The beneficial effects of the present invention are as follows: the present invention makes further optimization on the electric wrench body, so that the electric wrench body is not affected by the size ratio of the internal motor and the thickness of the protective shell when in use. Firstly, the protective cover on the electric wrench body is optimized to be flat instead of arc-shaped, thereby reducing the volume space. Then, the rotary cutter is separated from the motor shaft and the rotary cutter is positioned higher than the motor, thereby solving the influence of the size ratio of the motor and increasing the practicality of the device.

[0010] In order to further solve the existing problems, the driving push rod on the micro hydraulic push rod makes the steel rope twisted on the gear pass through the claw hand, and then the fixed plate and the wall are fastened together. When tightening, the micro hydraulic push rod and the frame wall are vertical, which solves the existing technical difficulties. The electric wrench body is located on the micro hydraulic push rod, which is convenient and labor-saving when used. The two can also be separated, which is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is a schematic diagram of the whole design of the present invention.

[0013] Figure 2 It is a schematic diagram of the overall clamp designed in the present invention.

[0014] Figure 3 It is a schematic diagram of the micro hydraulic push rod and the electric wrench body when they are separated in the design of the present invention.

[0015] Figure 4 It is a schematic diagram of A in the design of the present invention.

[0016] Figure 5 This is a schematic diagram of the entire interior of the fixture designed in the present invention.

[0017] Figure 6 It is a schematic diagram of another viewing angle of the overall design of the present invention.

[0018] Figure 7 It is a bottom schematic diagram of the whole design of the present invention.

[0019] Figure 8 It is a front view schematic diagram of the whole design of the present invention.

[0020] Fig. 9 It is a schematic diagram of the principle of the steel rope winding method in the design of the present invention.

[0021] Fig.10 It is a schematic diagram of B in the design of the present invention.

[0022] Description of the reference numerals: 1-micro hydraulic push rod, 101-driving push rod, 102-rack, 103-gear, 104-first rotating shaft, 2-electric wrench body, 201-transmission gear, 202-transition gear, 203-square connecting block, 204-protective cover, 205-bevel gear, 3-limiting assembly, 301-limiting hole, 4-sliding seat, 5-fixing assembly, 501-rotating mounting sleeve, 502-screw Grooved limit groove, 503-slip ring, 504-screw rod, 6-first fixed rod, 7-second fixed rod, 8-clamp, 801-claw hand, 802-guide rod, 803-through groove, 804-rotating seat, 9-second rotating shaft, 10-fixed plate, 1001-damping plate, 1002-spring, 1004-twisted wire shaft, 11-fixed card strip, 12-third rotating shaft, 13-first slide groove, 14-second slide groove. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example 1: Figures 1 to 10As shown, the present invention provides an electric wrench, including a micro hydraulic push rod 1 and an electric wrench body 2, wherein a motor is installed inside the electric wrench body 2, a transmission gear 201 is sleeved on the output shaft of the motor, a rotating rod is provided on the top of the electric wrench body 2, a transition gear 202 is sleeved on the rotating rod and meshes with the transmission gear 201, a square connecting block 203 is sleeved on the middle of the rotating rod, a protective sleeve 204 for installing a rotary cutter is fixed on one side of the square connecting block 203, a bevel gear 205 is fixed on one end of the rotating rod, a rotary cutter is rotatably installed on the protective sleeve 204, and a gear of the same type and size as the bevel gear 205 is also installed on one end of the rotary cutter, and the two are meshed together; wherein the micro hydraulic push rod 1 can be selected from Nanjing The model of Yongnuo Transmission Equipment Co., Ltd. is YNT-03. This solution can solve the problem by optimizing the design on the electric wrench body 2. When in use, the transmission gear 201 is driven by the motor, and the transition gear 202 is driven to rotate during the rotation of the transmission gear, thereby causing the transition gear 202 to rotate coaxially with the bevel gear 205. The transition gear 202 is arranged on the top of the electric wrench body 2 to avoid the trouble caused by the design problems of the internal motor and the shell. The motor shaft of the original electric wrench body 2 is connected with the rotary cutter, resulting in the internal motor position being fixed and unable to expand to the outside, resulting in the shell being very thick. In the solution, the rotary cutter and the motor shaft are separated, and the rotary cutter is located flat on the top of the motor shell, which can effectively solve the shell thickness problem.

[0025] The top of the protective cover 204 is designed to be flat without chamfers, and during use, the top of the protective cover 204 is attached to a frame or a wall to reduce the floor space, thereby bringing greater convenience to construction.

[0026] Embodiment 2: In order to further improve the embodiment 1, the expansion proposed on the basis of the embodiment 1 is that the micro hydraulic push rod 1 is equipped with a fixing assembly 5 for rotating and fixing the electric wrench body 2, and also includes a pair of clamps 8 provided on the micro hydraulic push rod 1 for fixing the frame, and a pair of anti-slip assemblies installed between the two clamps 8, wherein the fixing assembly 5 is provided on the micro hydraulic push rod 1 for rotating and fixing the electric wrench body 2, and the fixing assembly 5 is provided on the micro hydraulic push rod 1 for fixing the frame, and the anti-slip assemblies installed between the two clamps 8 are provided on the micro hydraulic push rod 1 for fixing the frame, and the anti-slip assemblies ... Figure 3 It can be seen that according to certain operation requirements, frames of different rules need to be fixed. At this time, if the electric wrench body 2 can only move on the micro hydraulic push rod 1, it is not conducive to the practicality after modification. Therefore, it is not only necessary to fix the electric wrench body 2 but also to rotate and move, as follows:

[0027] The fixing assembly 5 comprises a rotating mounting sleeve 501 arranged at the bottom of the electric wrench body 2, a slide seat 4 movably mounted on the micro hydraulic push rod 1, a slip ring 503 arranged at the bottom of the rotating mounting sleeve 501, a threaded limiting groove 502 arranged at the top of the slide seat 4, and a screw rod 504 arranged at the bottom of the slip ring 503 for matching the aperture of the threaded limiting groove 502. The micro hydraulic push rod 1 is sleeved with a limiting assembly 3, and the limiting assembly 3 is provided with a plurality of limiting holes 301, and the slide seat 4 is fixed to the limiting assembly 3 by a latch, as shown in FIG. Figure 1 It can be seen that the limit assembly 3 is composed of a ring fixed on the micro hydraulic push rod 1 and support rods fixed on both sides of the ring. When the electric wrench body 2 needs to be tapped, the pin fixed on the limit assembly 3 can be pulled out, and then the slide 4 can slide on the micro hydraulic push rod 1. It is simple and convenient. When the opening direction needs to be corrected, the electric wrench body 2 can be directly rotated by hand, and then the mounting sleeve 501 will rotate along the threaded limit groove 502. It only needs to be manually adjusted to the appropriate direction, and when the micro hydraulic push rod 1 is not needed, the electric wrench body 2 is rotated and separated along with the threaded limit groove 502 for easy storage.

[0028] A pair of first fixing rods 6 are installed on one side of one end of the micro hydraulic push rod 1 near the limit assembly 3, and a pair of second fixing rods 7 are installed on the other side of one end of the micro hydraulic push rod 1, and the first fixing rod 6 and the second fixing rod 7 are used to fix a clamp 8, and the clamp 8 includes a claw hand 801 fixed between a pair of first fixing rods 6 and the second fixing rod 7 by a threaded screw, a plurality of guide rods 802 arranged at the internal chamfers of the claw hand 801, and a rotating seat 804 arranged on the claw hand 801, and each of the claw hands 801 is provided with a through groove 803. As mentioned above, in actual operation, workers often need to hold up the electric wrench body 2, and fixing a micro hydraulic push rod 1 at the bottom of the electric wrench body 2 can effectively help workers save effort.

[0029] Embodiment 3: Based on the embodiment 2, further development is continued, the distance between each claw hand 801 is changed, each claw hand 801 is provided with a first slide groove 13, and a second slide groove 14 is provided on the top of the claw hand 801 near the first slide groove 13. A driving push rod 101 is installed inside the micro hydraulic push rod 1, and racks 102 are installed on both sides of the inner wall of the driving push rod 101. A first rotating shaft 104 is installed on the first slide groove 13 through a screw, and a gear 103 is sleeved on the first rotating shaft 104, and the gear 103 is meshed with the rack 102; wherein the first rotating shaft 104 is used for twisting wire, and the first rotating shaft 104 drives the anti-skid component to compress the extrusion frame, the first fixed rod 6 and the second fixed rod 7 can change position in the first slide groove 13 and the second slide groove 14 respectively, and only need to loosen and tighten the screw rods. When changing position, the distance between a pair of claw hands 801 can be changed to increase the scope of use.

[0030] A second rotating shaft 9 is installed on each of the claw hands 801, and the second rotating shaft 9 is composed of two fixed rods and a round roller arranged between the ends of the fixed rods.

[0031] The anti-skid assembly includes a fixed plate 10 connected to a rotating seat 804 by a hinge, a plurality of damping plates 1001 arranged on the fixed plate 10, a plurality of spring plates 1002 arranged on the damping plates 1001, and a twisted wire shaft 1004 arranged in the middle of one side of the fixed plate 10 and adjacent to the second rotating shaft 9. The spring plates 1002 are provided with anti-skid rubber. When the claw hand 801 is used, it can be attached to the wall straightly. Then, due to the Figure 1 and Fig. 9 It can be seen that, perpendicular to the wall, after the micro hydraulic push rod 1 is plugged in, the driving push rod 101 is controlled to push the rack 102 along the direction of the claw hand 801 through the through slot 803. After that, during the feeding process of the driving push rod 101, the gear 103 rotates and winds the wire, and the steel rope drives the second rotating shaft 9 to rotate. The end of the steel rope is tied to the stranding shaft 1004. As the gear 103 is winding the wire, it will pull the fixed plate 10 to squeeze it onto the frame. During the squeezing process, the rotating seat 804 will rotate on the claw hand 801 and move with it, promoting the squeezing effect during its activity, so that each damping plate 1001 can be in close contact with the frame or the wall, improving the fastening effect and preventing slipping;

[0032] The role of the shrapnel 1002 Figure 4It can be seen that the direction of the opening is toward the outside of the board, which serves the purpose of preventing slipping. Because when the fixing plate 10 is fixed on the frame, the micro hydraulic push rod 1 and the electric wrench body 2 have gravity, so when it is suspended vertically on the frame, the upper part of the fixing plate 10 is most likely to detach. Therefore, the spring piece 1002 is designed in this way to catch the frame when detaching, thereby enhancing the adsorption force between the fixing plate 10 and the frame.

[0033] The claw hand 801 is installed with a third shaft 12 on one side close to the fixed plate 10, and fixed clips 11 are installed at both ends of the third shaft 12. The fixed clips 11 are fixed to the fixed plate 10 by threaded screws. Since the claw hand 801 and the fixed plate 10 have too few fulcrums, the connection between them is prone to breakage. Then, the fixed clips 11 are installed on this basis to help increase the number of fulcrums and prevent the two from being broken by force. Figure 5 It can be seen that the two fixed clips 11 are fixed on the third rotating shaft 12, and form a triangle in space with the fixed plate 10, which helps to make the claw hand 801 and the fixed plate 10 more stable, thereby increasing its service life.

[0034] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An electric wrench, comprising a miniature hydraulic push rod (1) and an electric wrench body (2), characterized in that: A motor is installed inside the electric wrench body (2), and a transmission gear (201) is sleeved on the output shaft of the motor. A rotating rod is provided at the top of the electric wrench body (2), and a transition gear (202) is sleeved on the rotating rod and meshes with the transmission gear (201). A square connecting block (203) is sleeved on the middle of the rotating rod, and a protective sleeve (204) for mounting a rotary cutter is fixed on one side of the square connecting block (203). A bevel gear (205) is fixed at one end of the rotating rod, and a rotary cutter is rotatably mounted on the protective sleeve (204). A gear of the same type and size as the bevel gear (205) is also installed at one end of the rotary cutter, and the two gears are meshed together. The top of the protective cover (204) is designed to be a plane without chamfers; a limit assembly (3) is sleeved on the micro hydraulic push rod (1), a plurality of limit holes (301) are provided on the limit assembly (3), a slide seat (4) is movably sleeved on the micro hydraulic push rod (1), and the slide seat (4) is fixed to the limit assembly (3) by means of a latch; A pair of first fixing rods (6) are installed on one side of one end of the micro hydraulic push rod (1) near the limit assembly (3), and a pair of second fixing rods (7) are installed on the other side of one end of the micro hydraulic push rod (1), and the first fixing rod (6) and the second fixing rod (7) are used to fix a clamp (8), and the clamp (8) comprises a claw (801) arranged between the first fixing rod (6) and the second fixing rod (7) by a pair of threaded screws, a plurality of guide rods (802) arranged at the internal chamfer of the claw (801), and a rotating seat (804) arranged on the claw (801), and each of the claws (801) is provided with a through groove (803); Each of the claw hands (801) is provided with a first slide groove (13), and a second slide groove (14) is provided on the top of the claw hand (801) near the first slide groove (13). A driving push rod (101) is installed inside the micro hydraulic push rod (1), and racks (102) are installed on both sides of the inner wall of the driving push rod (101). A first rotating shaft (104) is installed on the first slide groove (13) through a screw rod, and a gear (103) is sleeved on the first rotating shaft (104), and the gear (103) is meshed with the rack (102); wherein the first rotating shaft (104) is used for twisting wire, and the first rotating shaft (104) drives the anti-slip component to compress the extrusion frame; Each of the claw hands (801) is mounted with a second rotating shaft (9), and the second rotating shaft (9) is composed of two fixed rods and a round roller arranged between the ends of the fixed rods; It also includes a pair of clamps (8) disposed on the micro hydraulic push rod (1) for fixing the frame, and a pair of anti-slip components installed between the two clamps (8); The anti-skid component comprises a fixed plate (10) connected to a rotating seat (804) via a hinge, a plurality of damping plates (1001) arranged on the fixed plate (10), a plurality of spring plates (1002) arranged on the damping plate (1001), and a twisted wire shaft (1004) arranged in the middle of one side of the fixed plate (10) and adjacent to the second rotating shaft (9), wherein the spring plates (1002) are provided with anti-skid rubber.

2. An electric wrench as claimed in claim 1, characterized in that: The micro hydraulic push rod (1) is provided with a fixing component (5) for rotating and fixing the electric wrench body (2).

3. An electric wrench as claimed in claim 2, characterized in that: The fixing assembly (5) comprises a rotating mounting sleeve (501) arranged at the bottom of the electric wrench body (2), a slip ring (503) arranged at the bottom of the rotating mounting sleeve (501), a threaded limiting groove (502) arranged at the top of the slide seat (4), and a spiral rod (504) arranged at the bottom of the slip ring (503) and used to match the aperture of the threaded limiting groove (502).

4. An electric wrench as claimed in claim 1, characterized in that: The claw hand (801) is provided with a third rotating shaft (12) on a side close to the fixed plate (10), and fixed clamping strips (11) are provided at both ends of the third rotating shaft (12), and the fixed clamping strips (11) are fixed to the fixed plate (10) via threaded screws.

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