CN102241004A

CN102241004A - Electronic torque spanner

Info

Publication number: CN102241004A
Application number: CN2010101683962A
Authority: CN
Inventors: 胡厚飞
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-05-11
Filing date: 2010-05-11
Publication date: 2011-11-16

Abstract

The invention discloses an electronic torque spanner which is provided with a body, a handle body and sensing members, wherein the body is provided with a driving part and a rod body; the rod body is provided with an axial lead; one end of the rod body is connected with the driving part; a bending part is arranged at the other end of the rod body, which is opposite to the driving part; at least one sensing part is arranged at the annular side of the rod body; when the electronic torque spanner applies force, the axial lead of the rod body is perpendicular to the axis of a work piece driven by the driving part; the handle body is provided with a holding part and a bending part; the bending part of the handle body is connected with the bending part of the body; a torque display device is arranged on the handle body; the sensing members are arranged on the sensing parts and are used for detecting the strain condition of the rod body, then transmitting a signal to the torsion display device for operation and displaying a torsion value and the subsequent applied dynamic change.

Description

Electronic torque wrench

Technical field

The present invention relates to a kind of electronic torque wrench, the particularly a kind of electronic torque wrench structure that can accurately detect torque value for the bending angle again.

Background technology

Commercially available now electronic torque wrench is mainly installing one sensing chip on the body of rod of torque spanner, wherein this existing electronic torque wrench is provided with a drive division except that an end on the body of rod, the other end then forms handle, this drive division can be ratchet, actuator such as plum blossom or opening forms, and existing electronic torque wrench is mainly and is provided with at least one sensing chip (Sensor) and a torsion display unit, wherein this sensing chip is mainly on the directly default installation position of at least one side ring of being attached on the electronic torque wrench body of rod, major function is a side that is attached to this electronic torque wrench body of rod, the length that sees through this sensing chip produces body of rod bending strain during with this electronic torque wrench body of rod application of force, and then the produce bending strain degree of the detecting electronic torque wrench body of rod after the application of force is reversed work package, this sensing chip can and then convert the strain variation value to signal, this signal connects the circuit of establishing through this sensing chip and is sent to the torsion display unit of this circuit in the installing of the electronic torque wrench body of rod other end, wherein this torsion display unit is preset with the computing electronics that connects this sensing chip, this electronic operation device forms data after can receiving the signal that the aforementioned sensing chip of union detected, and the display that sees through on this torsion display unit demonstrates the torque value data changing condition dynamically, use strain (torsion) data that operator's easy-to-read torque spanner is provided and increase situation, therefore the operator is when the locking work package, can according to the secure data of work package locking when performing the application of force to the predetermined application of force value of work package, can stop to reverse work package, and reach the effect of best safety locking work package.

Though can seeing through the detecting of induction pieces, existing electronic torque wrench provide this computing electronics to calculate the torsion transform data accurately accurately, the induction pieces of right existing electronic torque wrench performs the body of rod strain conditions of angle when performing with 90 ° vertical torsion angle for the axle center of detecting this electronic torque wrench and work package (screw), that is the reply of this induction pieces must be that 90 ° vertical torsion angle performs torsion under the situation and changes and just understand the relatively accurate strain value that detects, that is to be the vertical drive division that performs with work package must be under the horizontally extending situation with extending the body of rod be connected, sensing chip on its body of rod just can accurately detect and correctly be converted into torque value, in other words if during the electronic torque wrench of drive division and extension generation bending angle, inevitablely after its torsion conduction bending angle produce the component dispersion because of angle not, the torque value that is transmitted to this body of rod must scatter and disappear and be directed at the suffered strain of this body of rod and can not finish and present maximum bending change, so the strain conditions that this sensing chip is sensed promptly can be inaccurate.

Therefore electronic torque wrench in the past is for asking accurate, the grip part that mostly is its drive division and the body of rod and the other end thereof is whole design that can't bending, under the right situation that in narrow working space, performs, existing can't bending and only be fit to the conditional electronic torque spanner that development space uses and can't satisfy needs on the different usage spaces fully; Based on this reason, then there is the dealer between the existing electronic torque wrench design driven portion and the spanner body of rod, to have the structure of bending angle, but the torsion delta data that the electronic torque wrench that also therefore causes this drive division bending is detected is not accurate enough, therefore can't be used on the accurate use working condition.

But see also existing bending electronic torque wrench 40 designs shown in Figure 1, but for using restriction shortcoming and bending electronic torque wrench can't accurately detect the disappearance of torsion data in the space that solves existing electronic torque wrench that can't bending, then there is the dealer to develop bendable electronic torque wrench structure design shown in Figure 1, but wherein should be provided with a bending part 44 for a end by bending electronic torque wrench 40 in the body of rod, this bending part 44 has an open slot 441, this open slot 441 articulates an actuator 43 in wherein with a screw rod 431, actuator 43 is rotated in this open slot 441, but form angle bending, the other end of this actuator 43 is a drive end 41, this drive end 41 can connect driven units such as establishing sleeve (figure do not show) and do use as reversing work package (nut), being characterized as in this

actuator

43 and 41 of this drive ends of this structure is provided with an induction pieces 42, this induction pieces 42 is for being coated on the periphery of this actuator 43, connect a circuit 421 with a socket part 422 again and be connected to torsion display unit (figure does not show) from the body of rod place that this bending part 44 connects electronic torque wrench, but structural design features that should bending electronic torque wrench 40 is for seeing through the position is set can directly responds to the strain value that actuator 43 and this drive end 41 are produced of this induction pieces 42, and can not scatter and disappear and have influence on the detecting of induction pieces 43, but and reach electronic torque wrench bending and the accurately design of detecting torsion numerical value because of the angle bending of this bending part 44 produces torsion component.

But only aforesaid existing bending electronic torque wrench 40 structural designs still have following disappearance:

1. though this this induction pieces 42 is provided with the position and can makes its directly strain value of being produced of this actuator 43 of induction and this drive end 41, but increased the length of this actuator 43 also simultaneously with this drive end 41, for the restriction that increases with the usage space of work package upright position, add that drive end 41 again under the situation of socket sleeve, takies excessive space and is its shortcoming that designs.

2. this induction pieces 42 is for being coated on the periphery of this actuator 43, also be the position that drives work packages near this drive end 41, right electronic torque wrench is for exerting oneself greatly and part is collided for very easily producing in these drive end 41 positions, and the installation position of this induction pieces 42 is easy to generate damaged in collision when use be its another shortcoming.

3. only can the socket sleeve or the usefulness of hexagonal drive end in the design of this drive end 41, and the coating of this induction pieces 42 is designed to detect the strain of rotation, but can't detect as being used in the conversion of bend in one direction such as open-end wrench or double offset ring spanner, and also can't cooperate on the structural feature, therefore can drive the work package mode because of its restriction can't various attitude application.

Summary of the invention

The present invention is directed to the shortcoming of above-mentioned prior art, a kind of electronic torque wrench is provided.

Electronic torque wrench of the present invention has a body, a handle body and an induction pieces; This body has a drive division and a shaft, wherein this shaft has an axial line A, one end of shaft is for connecting this drive division, this shaft is provided with a bending part with respect to the other end of drive division, wherein offer at least one induction part on the ring side of this shaft, when electronic torque wrench performed, the axial line A of this shaft was on the axle center perpendicular to the work package that this drive division drove; This handle body has a grip part and a bending part, and the bending part of handle body and the bending part of body are connected, and this grip part then grips with hand for the operator and reverses use in addition, and wherein this handle is provided with a torsion display unit on one's body; This induction pieces is for being installed on this induction part, and is connected to this torsion display unit along this shaft after by this bending part with circuit; Wherein after the strain conditions of this induction pieces for this shaft of detecting, signal is seen through circuit be sent to after the torsion display unit computing and demonstrate torque value and the follow-up dynamic change that performs.

Drive division of the present invention can be the form of open-end wrench, double offset ring spanner or ratchet spanner; Can be connected a socket part between this drive division and this shaft, this drive division one end is provided with one first abutting end, the socket or separate mutually of this first abutting end and socket part, use replace different size drive division on the socket part, wherein induction part is opened on the shaft between socket part and bending part; And offering a sleeved part, a side of this grip part is provided with on it for this torsion display unit; This handle body middle section position more can be installed second bending part, forms the possibility of multi-angle bending; This bending part in the bending limited angular in this axial line A of shaft and handle body axle center for being not more than 30 °.

Description of drawings

Fig. 1 is the schematic diagram of existing structure.

Fig. 2 is the schematic perspective view of the present invention's first preferred embodiment.

Fig. 3 is the perspective exploded view of the present invention's first preferred embodiment.

Fig. 4 is the side cross-sectional schematic of the present invention's first preferred embodiment.

Fig. 5 is the enforcement action schematic diagram of the present invention's first preferred embodiment.

Fig. 6 is the schematic perspective view of the present invention's second preferred embodiment.

Fig. 7 is the perspective exploded view of the present invention's second preferred embodiment.

Fig. 8 is the side cross-sectional schematic of the present invention's second preferred embodiment.

Fig. 9 is that the partial structurtes of the embodiment of the invention are used decomposing schematic representation.

Figure 10 is the structure applications decomposing schematic representation of the embodiment of the invention.

Figure 11 is the structure applications decomposing schematic representation of the present invention's the 3rd preferred embodiment.

The specific embodiment

Those skilled in the art below cooperate Figure of description that embodiments of the present invention are done more detailed description, so that can implement after studying this specification carefully according to this.

See also shown in the present invention's first preferred embodiment of Fig. 2 and Fig. 3, but the design feature of electronic torque wrench of the present invention is to detect accurately the strain value of wrench body in the design of bending, and then calculate torque value, and can make drive division not increase the design that takes up room and be convertible into different driving portion structure and specification again; But in the design part of bending and accurate induction, structure of the present invention has a body 10, a handle body 20 and a torsion display unit 30.

This body 10 mainly has a shaft 11 and a drive division 12, wherein the axial line of this shaft 11 is defined as A, one end of shaft 11 is for connecting this drive division 12, this drive division 12 is a two-way spine move part in the present embodiment, and this drive division 12 has known constructions such as a spine move portion 121, a drive end 122 and a direction switch bar 123.

This shaft 11 is provided with a bending part 112 with respect to the other end of drive division 12, in the present embodiment, this bending part 112 is that an end has ring gear 1122, ring gear 1122 centers offer axis hole 1121, wherein offer at least one induction part 111 on the ring side of this shaft 11, these induction part 111 peripheries more are coated with the collar 13 that a flexible plastic is shaped, and the axial line A of this shaft 11 rotates for socket on the axle center of the work package (nut) that driven perpendicular to this drive division 12, and this moment, this shaft 11 made shaft 11 produce bending strains because produce shear force perpendicular to the axle center of work package.

This handle body 20 has a grip part 22 and a bending part 212, and handle body 20 has the body of rod 21 these bending parts 212 of connection.These body of rod 21 definition one axial line B, the body of rod 21 outer shrouds are coated with grip part 22, and wherein the bending part 212 of this handle body 20 socket-connects the bending part 112 of this open slot body and body 10 for having an open slot body.This bending part 212 also offers a relative pivot hole 2122, penetrates the axis hole 1121 that links aforesaid bending part 112 for a latch 214, makes the bending part 112 of body 10 be coupling to rotate on this bending part 212 and links.

One side of this bending part 212 offers an opening 2121, this opening 2121 is arranged with a button release 213 and a limited part 215 in these bending part 212 inner spaces, wherein this button release 213 is meshing or be located away from the ring gear 1122 of aforementioned bending part 112 for discharging this limited part 215, makes it restriction or discharge to rotate.The design of the rotational angle of this bending part 112/212 is that to be not more than 30 ° (promptly being less than or equal to 30 °) with this axial line A and the formed maximum bending angle θ of B be best collocation design; This grip part 22 is the cylinder of a soft plastic injection molding in present embodiment, and this grip part 22 coats for being sheathed on the body of rod 21 outer shrouds, the grasping force and the comfort that provide the operator to grip.

More directly mode such as injection molding fit is for it for grip part 22 and the body of rod 21, a place of this grip part 22 more can be reserved with a sleeved part 221 and is installed in wherein for a torsion display unit 30 in the present embodiment, and more can reserve the setting area 211 of this torsion display unit 30 of device to adapt to the collocation design of different volumes on the body of rod 21 relative sleeved part 221 positions.

This induction pieces 32 is for being installed on this induction part 111, and be connected to this torsion display unit 30 with the body of rod 21 that circuit 31 is prolonging handle body 20 after by this bending part 112/212 along this shaft 11 and connect, on this torsion display unit 30, have known design such as torsion computing electronics and display screen, after seeing through the strain conditions of these induction pieces 32 these shafts 11 of detecting, signal is seen through circuit 31 be sent to the 30 back computings of torsion display unit and demonstrate torque value and the follow-up dynamic changing data that performs.

See also Fig. 4 and the present invention's first preferred embodiment completed assembled schematic diagram shown in Figure 5; in the design of present embodiment when electronic torque wrench performs; on the axle center of the axial line A of this shaft 11 for the work package that driven perpendicular to this drive division 12; therefore the setting position of induction pieces 32 can't be subjected to the influence that strength conduction component scatters and disappears because of the bending of bending part 112/212; still can accurately detect the strain conditions of shaft 11; and sensing chip 32 is subjected to the collar 13 protections of outer shroud; and apart from drive end 122 according to ordering above spacing; therefore sensing chip 32 chance of damaging that is collided significantly reduces; sensing chip 32 is for being installed in a side of shaft again; therefore but can be generally increase drive division 12 or drive division 12 adds that the volume of extension socket 50 takies, therefore be more suitable for narrow space use needs on relatively as the electronic torque wrench 40 of existing bending.

See also Fig. 6 again, drawing shown in Fig. 7 and the present invention's second preferred embodiment shown in Figure 8, for can some needs of special space demand more, in the electronic torque wrench structure design of the present invention, more can add one second body of rod 23 in this

body

10 and 20 of this handle bodies, this second body of rod 23 is an extension body of rod that increases, the one end is provided with second bending part 232 with aforementioned bending part 212 same structures design, and has an open slot body equally, the bending part 112 of this open slot body and body 10 is socket-connected, this second bending part 232 also offers a relative pivot hole 2322 penetrates the aforesaid bending part 112 of binding for a latch 234 axis hole 1121, the bending part 112 of body 10 is coupling on this second bending part 232, rotates and link, one side of this second bending part 232 offers an opening 2321 equally, this opening 2321 is arranged with a button release 233 and a limited part 235 in second bending part, 232 inner spaces, wherein this button release 233 is meshing or be located away from the ring gear 1122 of aforementioned bending part 112 for discharging this limited part 235, make it restriction or discharge to rotate, and second body of rod 23 has ring gear 231 with aforementioned bending part 112 same design with respect to the other end of second bending part 232, this ring gear 231 is connected with the bending part 212 of handle body 20, and more can be sheathed on second body of rod 23 second collar 24 that is shaped of a soft plastic, global design can be formed with plural bending design, make whole electronic torque wrench more can carry out multi-faceted reversing, and detect the torsion variation accurately.

See also in the structure embodiment application of the present invention shown in Figure 9, this body of rod 11 more can offer plural induction part 111, uses sheathed a plurality of induction pieces 32/32 ', uses the sensitivity that increases detecting again, for design is used in the extension that the present invention can learn; Structure chart shown in addition again please view 10, this drive division 12 more replaceablely be the drive division 16 of open-end wrench or be the drive division 17 of double offset ring spanner specification except that can be the spine move part, uses as what different size needed and replace usefulness; See also again shown in the third embodiment of the invention of Figure 11, easily may for more having in the structure replacement that makes drive division between aforementioned different size, the present invention more can more can set up a socket part 18 in 11 of this drive division 15/16/17 and this shafts and be connected, and be provided with one first abutting end 151/161/171 in drive division one end of each specification, particularly drive division 15 is for to have identical spine move portion 153 with aforesaid drive division 12, with known constructions such as an one drive end 152 and direction switch bar 154, each first abutting end 151/161/171 can be socket-connected or separate with socket part 18, use replace different size drive division 15/16/17 on socket part 18, this induction part 111 is opened on the shaft 11 of 121 of socket part 18 and bending parts in this embodiment.

In sum, the present invention is by the sheathed position collocation of induction pieces, and integrally-built design, make electronic torque wrench be able in the bending process, detect accurately accurately torsion and change that the induction pieces installation position volume that can not increase drive division takies and avoid broken the damage evil idea and the different size drive division of can arranging in pairs or groups again.

The above only is in order to explain preferred embodiment of the present invention; be not that attempt is done any pro forma restriction to the present invention according to this; therefore, all have in that identical creation spirit is following do relevant any modification of the present invention or change, all must be included in the category that the invention is intended to protect.

Claims

1. an electronic torque wrench is characterized in that, includes:

One body, this body has a drive division and a shaft, wherein this shaft has an axial line, one end of shaft is for connecting drive division, shaft has a bending part with respect to the other end of drive division, the ring side of this shaft is provided with at least one induction part, and when electronic torque wrench performed, the axial line of this shaft was on the axle center perpendicular to the work package that this drive division drove;

One handle body, this handle body has a grip part and a bending part, and wherein handle is provided with a torsion display unit on one's body, and the bending part of handle body and the bending part of body are connected; And

One induction pieces, this induction pieces be for being installed on this induction part, and be connected to this torsion display unit along this shaft after by this bending part with circuit;

Wherein, this induction pieces is for after the torsion of this shaft of detecting changes, and shows torque value after signal is sent to the torsion display unit.

2. electronic torque wrench as claimed in claim 1 is characterized in that, this drive division is a double offset ring spanner.

3. electronic torque wrench as claimed in claim 1 is characterized in that, this drive division is an open-end wrench.

4. electronic torque wrench as claimed in claim 1 is characterized in that, this drive division is a ratchet spanner.

5. electronic torque wrench as claimed in claim 1, it is characterized in that, be connected with a socket part between this drive division and this shaft, this drive division one end is provided with one first abutting end, the socket or separate mutually of this first abutting end and socket part, use replace different size drive division on the socket part, wherein, induction part is opened on the shaft between socket part and bending part.

6. electronic torque wrench as claimed in claim 1 is characterized in that, a side of this grip part offers a sleeved part, is provided with on it for this torsion display unit.

7. electronic torque wrench as claimed in claim 1, it is characterized in that, this handle body middle section position can be installed one second body of rod, and the bending part that this second body of rod has one second bending part and this shaft links, and second body of rod links with respect to the other end of second bending part and the bending part of handle body.

8. electronic torque wrench as claimed in claim 1 is characterized in that, the outer sheathed collar of this shaft.

9. electronic torque wrench as claimed in claim 1 is characterized in that, this bending part in the bending limited angular of this axial line A of shaft and handle body axial line B for being not more than 30 °.