CN108747926B - A multifunctional hardware wrench with torque indication - Google Patents

Abstract

The invention discloses a multifunctional hardware wrench with moment indication, which comprises a shell, wherein a cover plate is fixedly sleeved at one end of the shell, a steel pipe is fixedly connected to one side of the outer side wall of the shell, a scale plate is fixedly connected to one side of the steel pipe parallel to the shell, a handle rod is fixedly sleeved at one end of the steel pipe far away from the shell, a second cavity is arranged in the shell, a gear is rotatably connected to the inside of the second cavity, a plug is fixedly connected to one end of the steel pipe far away from the shell, a coil spring is movably connected to one end of the plug, a sliding block is movably connected to one end of the coil spring far away from the plug, a first cavity is arranged in the sliding block, a Z-shaped plate and an elastic piece are arranged in the first cavity, and a pointer is movably clamped at the side wall of the Z-shaped plate far away from one end of the gear.

Description

A multifunctional hardware wrench with torque indication

Technical Field

The invention relates to the technical field of mechanical tools, in particular to a multifunctional hardware wrench with torque indication.

Background Art

The adjustable wrench is a commonly used installation and disassembly tool, and its opening width can be adjusted within a certain range. It is mainly used in industrial processing, production and maintenance. When tightening and loosening screws or nuts with ordinary adjustable wrenches, when tightening and loosening the screws or nuts about half a turn, the wrench needs to be separated from the screws or nuts, and then the wrench is clamped with them, and then the screws or nuts are tightened and loosened, and this process is repeated until they are completely tightened and loosened. This separation process affects work efficiency, and the size of the wrench head is inconvenient to adjust. In addition, for some processing and manufacturing occasions with higher requirements, the tightness of the screws will be standardized. It is obviously not possible to fully meet the requirements by tightening the screws by relying on the operator's feeling. The existing tools with a display of the tightening force of the wrench are complex in structure and inconvenient to use. For this reason, we propose a multifunctional hardware wrench with a torque indicator.

Summary of the invention

The purpose of the present invention is to provide a multifunctional hardware wrench with torque indication to solve the problems raised in the above background technology.

To achieve the above object, the present invention provides the following technical solution: a multifunctional hardware wrench with torque indication, comprising a shell, one end of the shell is fixedly sleeved with a cover plate, one side of the outer side wall of the shell is fixedly connected with a steel pipe, the side of the steel pipe parallel to the upper surface of the shell is fixedly connected with a scale plate, and the end of the steel pipe away from the shell is meshed with a handle rod;

The shell is provided with a second cavity inside, the second cavity is communicated with the inside of the steel pipe, a gear is rotatably connected inside the second cavity, both ends of the gear pass through the second cavity, and one end extends to the outside of the shell, and the other end extends to the outside of the cover plate, a plug is meshed at one end of the inside of the steel pipe away from the shell, a coil spring is movably connected to one end of the plug, a slider is movably connected to one end of the coil spring away from the plug, one end of the slider away from the coil spring passes through the side wall of the second cavity and extends to the inside thereof and is movably connected to the gear, a first cavity is provided inside the slider, The first cavity is connected to the Z-plate through a rotating shaft, and a pressure head is provided at one end of the Z-plate, and the pressure head passes through the side walls of the first cavity and the second cavity and extends to the interior of the second cavity and is movably engaged with the teeth of the gear. A pointer is connected to the side wall of the Z-plate away from the gear, and the end of the pointer away from the Z-plate passes through the slider and the steel pipe in sequence and extends to above the scale plate. An elastic part is provided at one end of the slider located in the second cavity, and the elastic part is located on one side of the pressure head and is movably connected to the pressure head. Slide grooves are provided at both ends of the gear, and the slide grooves are slidably engaged with the blocks provided on the wrench mechanism.

Preferably, the wrench mechanism includes a lower splint, a groove on one side of the lower splint is provided with a long plate and a bent plate rotatably connected to the inside through a pin, the end of the long plate away from the lower splint is rotatably connected to a web plate through a knob, one end of the web plate is rotatably connected to the middle part of the bent plate through a pin, the end of the bent plate away from the lower splint is fixedly connected to an upper splint, and the upper splint is movably connected to the lower splint.

Preferably, the wrench mechanism is a sleeve.

Preferably, the elastic member is an elastic protrusion.

Preferably, the elastic member is composed of a plurality of disc springs, the plurality of disc springs are sleeved on a guide rod provided on the slide block, and a clearance groove corresponding to the guide rod is formed on the pressure head.

Preferably, a sheath is slidably sleeved on the outer side wall of the handle bar away from one end of the steel pipe.

Preferably, the ratio of the length of the lever arm from the rotating shaft to the pressure head to the length of the lever arm from the rotating shaft to the pointer is in the range of 1:3 to 1:6.

Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention can only tighten the screws or nuts in one direction through the connection relationship between the gear and the slider, and will not tighten them in the reverse direction. It can achieve the goal of tightening and loosening them without disengaging the wrench from the screws or nuts, thereby achieving the purpose of quick tightening and loosening. Through the connection relationship between the gear, the Z-plate, and the elastic member, the torque applied by the gear on the Z-plate can be reflected on the scale plate through the pointer displacement, allowing the user to see it intuitively, thereby achieving the purpose of tightening the threaded connection that requires a pre-tightening torque. By loosening the knob to adjust the web angle, the open-ended pliers composed of the upper and lower clamps can be opened to a suitable position, and then the knob can be tightened to fix it, thereby achieving the purpose of clamping the screws or nuts. This device can tighten standard screws or nuts and non-standard parts, and is very flexible and convenient to use. In addition, this device is detachable and easy to assemble, and it is convenient to replace gears, sliders and other consumable parts.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic structural diagram of the present invention;

FIG2 is an exploded view of the present invention;

FIG3 is a schematic diagram of the connection between the slider, the steel pipe and the Z-shaped plate of the present invention;

FIG4 is an enlarged view of the A portion of FIG3 when the elastic member of the present invention is an elastic protrusion;

FIG5 is a schematic diagram of the upper and lower clamping plates of the present invention in a closed state;

FIG6 is a schematic diagram of the upper and lower clamping plates of the present invention in an open state;

FIG7 is a schematic diagram of the position of the slide groove on the gear of the present invention;

FIG8 is a schematic diagram of the sleeve structure of the present invention;

FIG9 is a schematic structural diagram of a Z-shaped plate and a pointer of the present invention;

FIG. 10 is a schematic diagram of the structure of the pressure head when the elastic member of the present invention is a disc spring.

In the figure: 1, shell, 2, cover plate, 3, steel pipe, 4, handle bar, 5, scale plate, 6, pointer, 7, sheath, 8, upper splint, 9, belly plate, 10, lower splint, 11, gear, 12, slide groove, 13, slider, 14, Z-plate, 15, coil spring, 16, plug, 17, elastic member, 171, elastic protrusion, 172, disc spring, 173, guide rod, 18, first cavity, 19, second cavity, 20, knob, 21, bent plate, 22, long plate, 23, pressure head, 24, rotating shaft, 25, sleeve, 26, groove, 27, give way groove.

DETAILED DESCRIPTION

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.

Please refer to Figure 1-10.

Embodiment 1, the present invention provides a technical solution: a multifunctional hardware wrench with torque indication, comprising a shell 1, one end of the shell 1 is fixedly sleeved with a cover plate 2, the outer wall of the shell 1 is meshed and sleeved with the inner wall of the cover plate 2 through a thread, if the teeth of the gear 11 in the shell 1 are seriously worn, the cover plate 2 can be unscrewed to facilitate the replacement of the gear 11, one side of the outer wall of the shell 1 is fixedly connected with a steel pipe 3, the steel pipe 3 and the shell 1 are connected as a whole, the side of the steel pipe 3 parallel to the upper surface of the shell 1 is fixedly connected with a scale plate 5, the scale plate 5 is provided with a torque meter, the torque meter is calculated in advance according to the deformation of the elastic member 17 and the ratio of the Z-plate 14, the end of the steel pipe 3 away from the shell 1 is meshed and sleeved with a handle bar 4, the handle bar 4 is meshed and sleeved with the outer wall of the steel pipe 3 through a thread, if the parts inside the steel pipe 3 need to be replaced, the handle bar 4 can be disassembled;

A second cavity 19 is provided inside the shell 1, and the second cavity 19 is communicated with the interior of the steel pipe 3. A gear 11 is rotatably connected inside the second cavity 19. Both ends of the gear 11 pass through the second cavity 19, and one end extends to the outside of the shell 1, while the other end extends to the outside of the cover plate 2. The center hole of the end face of the shell 1 is concentric and equal in diameter to the center hole of the end face of the cover plate 2. The gear 11 is between the shell 1 and the cover plate 2, and its two ends respectively pass through the two center holes and rotate inside the two center holes. A plug 16 is meshed at one end of the steel pipe 3 away from the shell 1, and the plug 16 is fixedly connected to the steel pipe 3 by threads. A cross groove is provided at one end of the plug 16, which can be disassembled to facilitate the replacement of the slider 13 and the coil spring 15. One end of the plug 16 is movably connected to the coil spring 15, and the end of the coil spring 15 away from the plug 16 is movably connected to the slider 13, and the end of the slider 13 away from the coil spring 15 passes through the side wall of the second cavity 19. The slider 13 is connected to the tooth surface of the gear 11 by the tooth surface of the gear 11, and the slider 13 is connected to the tooth surface of the gear 11 by the tooth surface of the gear 11. A first cavity 18 is provided, and the first cavity 18 is connected to the Z-shaped plate 14 through a rotating shaft 24. The elastic member 17 can be in the form of an elastic protrusion 171 to support the Z-shaped plate 14 (the relationship between the elastic coefficient and the deformation amount of the elastic protrusion 171 is measured and calculated in advance). A pressure head 23 is provided at one end of the Z-shaped plate 14. The pressure head 23 is made of 3Cr2W8V alloy tool steel, which has high hardness and small deformation, which is conducive to improving the accuracy of the device. The pressure head 23 penetrates the side walls of the first cavity 18 and the second cavity 19 and extends to the inside of the second cavity 19 and is movably engaged with the teeth of the gear 11. A pointer 6 is connected to the side wall of the Z-shaped plate 14 away from the gear 11. The end of the pointer 6 away from the Z-shaped plate 14 penetrates the slider 13 and the steel pipe 3 in sequence and extends to the top of the scale plate 5. The end of the slider 13 located in the second cavity 19 is provided with an elastic member 17, and the elastic member 17 is located on one side of the pressure head 23 and is movably connected to the pressure head 23. Both ends of the gear 11 are provided with There is a slide groove 12, and the slide groove 12 is slidably engaged with the card block provided on the wrench mechanism. The left end pressure head 23 of the Z-shaped plate 14 is in rigid contact with the gear 11. Taking Figure 3 as an example, when the screw or nut is to be tightened, the handle rod 4 is rotated counterclockwise. When the tooth surface contacts the pressure head 23, the Z-shaped plate 14 will drive the gear 11 to rotate counterclockwise to tighten the screw or nut under the action of external force. Under the reaction force, the teeth will squeeze the end of the pressure head 23 to move downward, and the Z-shaped plate 14 will squeeze the elastic member 17 to make it form The right end of the Z-shaped plate 14 rotates upward with the rotating shaft 24 as the center. Since the back of the rightmost end of the Z-shaped plate 14 is connected to the pointer 6, the pointer 6 will also rotate upward, thereby indicating a value on the scale plate 5. The handle bar 4 continues to be rotated counterclockwise, that is, when the external force continues to increase, the deformation of the elastic member 17 increases. When the pointer 6 points to the required torque value, you can let go, indicating that the nut is tightened in place. When the external force is cancelled, the Z-shaped plate 14 will restore the balance state under the action of the elastic protrusion 171.

Specifically, the ratio of the arm length from the rotating shaft 24 to the pressure head 23 to the arm length from the rotating shaft 24 to the pointer 6 is in the range of 1:3 to 1:6. By adopting this ratio range, the deformation of the elastic member 17 can be amplified and displayed on the scale plate 5 by the pointer 6, which is more obvious. Specifically, the outer wall of the handle rod 4 away from the end of the steel pipe 3 is slidably sleeved with a sheath 7, and the material of the sheath 7 is high-quality PP to reduce fatigue generated during operation.

Embodiment 2, in order to make the wrench applicable to a wider range of nuts, the spanner mechanism includes a lower clamping plate 10, a groove 26 provided on one side of the lower clamping plate 10 is rotatably connected to a long plate 22 through a pin shaft, and the spanner mechanism is connected through a slide groove 12. Because this device can only be tightened in one direction, when you want to loosen, you need to slide the open-end pliers out and install them in the slide groove 12 at the other end. The two slide grooves 12 are slidably connected to the lower clamping plate 10, and the groove of the lower clamping plate 10 is rotatably connected to a long plate 22 and a bent plate 21 through a pin shaft. The end of the long plate 22 away from the lower clamping plate 10 is rotatably connected to the web 9 through a knob 20. The button 20 adopts a fine thread with a small pitch, a small thread lead angle, and good self-locking performance. The bent plate 21, the web 9 and the long plate 22 form a connecting rod mechanism. One end of the web 9 is rotatably connected to the middle of the bent plate 21 through a pin. The end of the bent plate 21 away from the lower clamp 10 is fixedly connected to the upper clamp 8. The upper clamp 8 is movably connected to the lower clamp 10. The upper clamp 8, the lower clamp 10 and the connecting rod mechanism form an opening pliers. By loosening the knob 20 and pulling the web 9, the width of the opening of the opening pliers can be adjusted, and then tightening the knob 20 to fix the opening; of course, the wrench mechanism can be used with a conventional replaceable sleeve 25.

Embodiment 3, on the basis of embodiment 2, the elastic member 17 can be changed into a disc spring 172, the elastic member 17 is composed of a plurality of disc springs 172, the specifications of the disc spring 172 being an outer diameter of 4 mm and an inner diameter of 2.1 mm. The plurality of disc springs 172 are sleeved on a guide rod 173 provided on the slider 13, the pressure head 23 is provided with a clearance groove 27 corresponding to the guide rod 173, to provide a clearance space for the pressure head 23 to squeeze the disc spring 172 downward and cause deformation, the disc spring 172 is a special spring that is conical in the axial direction and bears load, after bearing load deformation, it can achieve the effect of low stroke and high compensation force, and can exert a relatively stable elastic effect in a smaller space, which is very suitable for the use in this application.

Working principle: Taking the tightening nut as an example, refer to Figure 1 to loosen the knob 20, pull the web 9 to the right, so that the open-end pliers composed of the upper clamp 8 and the lower clamp 10 open a suitable distance, then tighten the knob 20, clamp the nut, hold the sheath 7, turn the handle bar 4 half a turn clockwise, then turn it half a turn counterclockwise, and then turn it half a turn clockwise, and repeat this process until the nut is completely tightened. When rotating clockwise, the gear 11 will squeeze the Z-shaped plate 14 in the second cavity 19 to cause displacement, causing the elastic member 17 to deform. The amount of deformation of the elastic member 17 will be reflected on the scale plate 5, and the pointer 6 will indicate the torque used on the scale plate 5. According to the torque requirements specified in the mechanical manual (or the values of other instructions), stop tightening when the pointer 6 indicates the required value. When loosening the nut, just slide the open-end pliers out of the lower slide groove 12 and install it in the upper slide groove 12, and repeat the above operation.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims (3)

1. The utility model provides a take moment to instruct multi-functional five metals spanner, includes casing (1), its characterized in that: one end of the shell (1) is fixedly sleeved with a cover plate (2), one side of the outer side wall of the shell (1) is fixedly connected with a steel pipe (3), one side, parallel to the upper surface of the shell (1), of the steel pipe (3) is fixedly connected with a scale plate (5), and one end, far away from the shell (1), of the steel pipe (3) is meshed and sleeved with a handle rod (4);

The inside of casing (1) is equipped with second cavity (19), the inside of second cavity (19) communicates with each other with steel pipe (3), the inside rotation of second cavity (19) is connected with gear (11), the both ends of gear (11) all run through second cavity (19), and one end extends to the outside of casing (1), and the other end extends to the outside of apron (2), the inside of steel pipe (3) is kept away from the one end meshing of casing (1) and is connected with end cap (16), the one end swing joint of end cap (16) has coil spring (15), the one end swing joint of end cap (16) of coil spring (15) is kept away from end cap (16) has slider (13), the one end of slider (13) is kept away from coil spring (15) runs through the lateral wall of second cavity (19) and extends to its inside and with the tooth swing joint of gear (11), the inside of slider (13) is equipped with first cavity (18), first cavity (18) are connected with Z word board (14) through pivot (24), the one end cap (14) is equipped with pressure head (23) and the inside of a second cavity (19) and the tooth that extends to the inside of second cavity (19), the side wall of one end, far away from the gear (11), of the Z-shaped plate (14) is connected with a pointer (6), one end, far away from the Z-shaped plate (14), of the pointer (6) sequentially penetrates through the sliding block (13) and the steel pipe (3) and extends to the upper part of the scale plate (5), one end, located in the second cavity (19), of the sliding block (13) is provided with an elastic piece (17), the elastic piece (17) is located on one side of the pressure head (23) and is movably connected with the pressure head (23), sliding grooves (12) are formed in two ends of the gear (11), and the sliding grooves (12) are in sliding clamping connection with clamping blocks arranged on a spanner mechanism;

the outer side wall of one end, far away from the steel pipe (3), of the handle rod (4) is sheathed with a sheath (7) in a sliding manner, and the ratio of the length of a force arm from the rotating shaft (24) to the pressure head (23) to the length of a force arm from the rotating shaft (24) to the pointer (6) is in the range of 1:3 to 1:6.

2. The multifunctional hardware wrench with moment indication according to claim 1, wherein: the spanner mechanism comprises a lower clamping plate (10), a long plate (22) and a bent plate (21) are respectively connected in a groove (26) formed in one side of the lower clamping plate (10) in a rotating mode through a pin shaft, one end of the long plate (22) away from the lower clamping plate (10) is connected with a web plate (9) in a rotating mode through a knob (20), one end of the web plate (9) is connected with the middle portion of the bent plate (21) in a rotating mode through the pin shaft, one end of the bent plate (21) away from the lower clamping plate (10) is fixedly connected with an upper clamping plate (8), and the upper clamping plate (8) is movably connected with the lower clamping plate (10).

3. The multifunctional hardware wrench with moment indication according to claim 1, wherein: the spanner mechanism is a sleeve (25).