CN100450724C

CN100450724C - Torque wrench with sensor

Info

Publication number: CN100450724C
Application number: CNB2005101248448A
Authority: CN
Inventors: 廖文煇
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-11-22
Filing date: 2005-11-22
Publication date: 2009-01-14
Anticipated expiration: 2025-11-22
Also published as: CN1970235A

Abstract

The spanner of a sensor is used to improve the precision and repeatability of the torsion value measuring. The spanner comprises a body, at least a sensor, and at least a positioning device, with the body having at least a positioning section partially proud of the wall of the body, each sensor having two ends and a body between these two ends which has at least one sensing plate to check the deformation status. The sensor is set on the body, each end setting on each positioning section, and each fastening device being used to combine the body and each sensor.

Description

Torque spanner with sensor

Technical field

The present invention is relevant with spanner, is meant a kind of torque spanner with sensor especially.

Background technology

When using the spanner swivel bolt, for the torque magnitude that will know that swivel bolt applies, generally can on pinch bar, directly paste a strain gauge, the distortion that utilizes spanner when switching, to be produced, drive strain gauge and produce electrically variation, can calculate and demonstrate torque value via this electrical variation of sensing.

In the above-mentioned mode of strain gauge directly being pasted on pinch bar, since can produce strain gauge can't be according to the different application demand shortcoming used of dismounting arbitrarily, therefore (TaiWan, China Announcement Number M268138 patent case) as shown in figure 22, it is the torsion torque sensor 201 that is installed in spanner 200 for with adding formula, but the sensing component 204 of sensing handle 203 deflections is set at the neck 202 of torsion torque sensor 201, sensing component 204 is a strain gauge, the user can be installed in torsion torque sensor 201 spanner of dissimilar or torque magnitude easily, to obtain the function of torque value sensing.

But, above-mentioned spanner 200 mainly is that torsion torque sensor 201 is directly locked at handle 203, when spanner 200 during because of stressed the distortion, because the surface of position at spanner 200 fixation of sensor 201 has the stress and strain generation, this factor will cause the faying face between sensor 201 and the spanner 200 to produce relative wriggling or slip, it is reported that strain gauge is a kind of very accurate and sensitive assembly, when spanner more than 200 time back and forth after the switching, in case wriggling or sliding phenomenon take place, will lose original relative position relation between sensor 201 and the spanner 200, that is sensing component 204 can't correctly sense the flexural deformation and the torque value of spanner 200, and then has influence on the accuracy and the reappearance of sensor 201.

And for example Figure 23 and (No. the 6928885th, U.S.'s Announcement Number and No. 6948380 patent case) shown in Figure 24, this two figure exposes a kind of torque spanner, spanner has a body 211, at least one straining and sensing device 212, a computing circuit 213, and a display unit 214; One shank 215 of body 211 has two side bearing surfaces 216 (as shown in figure 23) or a caulking groove 217 (as shown in figure 24), each straining and sensing device 212 is removably to be installed in each side bearing surface 216 or caulking groove 217, one response body 218 of strain sensor 212 is connected to each the side bearing surface 216 or the internal face of caulking groove 217, when body 211 is subjected to switching and when driving response body 218 distortion, can allow a straining and sensing unit 219 of being located at response body 218 produce electrically variation, and then measure the torque value of spanner.

Yet, because the response body 218 of above-mentioned spanner also is side bearing surface 216 or the caulking groove 217 that directly is connected to body 211, the problem that is run into is just as above-mentioned ground, when spanner is subjected to the torsion distortion, relative slip also can take place with faying face between the body 211 in response body 218, can cause equally between straining and sensing unit 219 and the body 211 and lose stable relative position relation.In addition, shown in Figure 23 as, in response to variant 218 is flat shape, when response body 218 in compression during situation, response body 218 can produce and frustrate song (buckling) phenomenon, and response body 218 can make response body 218 and body 211 that serious sliding phenomenon takes place when elongation, these phenomenons all can cause between straining and sensing unit 219 and the body 211 and lose stable marriage relation, so that the problem of flexural deformation of sensing spanner correctly and torque value.

Summary of the invention

Main purpose of the present invention is to be to provide a kind of torque spanner with sensor, and sensor is can firmly mutually combine with wrench body, to promote the accuracy and the reappearance of torque value that sensor is measured.

Take off purpose for before reaching, a kind of torque spanner provided by the present invention is characterized in that, includes:

One body, this body has at least one location division, and respectively this location division is the wall that protrudes this body;

At least one sensor, described sensor has at least two ends, and a body portion between described end, has an elastic portion between this body portion and at least one this end, this body portion is provided with at least one sensing chip, described sensing chip is in order to the deflection of this body portion of sensing, and the described end of each sensor is to be located at this body, makes this sensor one end be located at least one this location division; And

At least one fixture, described fixture are in order in conjunction with this body and each sensor.

Wherein the body portion of this sensor and this body are at a distance of preset distance.

Wherein the sectional area of the body portion of this sensor is less than the sectional area of each end.

Wherein this body has a head and a grip part, and one has a pars intermedia with being connected between this head and this grip part, and described location division is that Local Convex is for this pars intermedia.

Wherein this body has a groove, and described location division is the wall that protrudes from this groove.

Wherein each location division of this body has a base segment and from the extended connected section of this base segment, and this base segment is the wall that protrudes from this body with extending, and this connected section then extends the outer end of this base segment.

Wherein this body has at least one recess that is depressed in wall, and each location division is to extend towards this wall from the bottom of described recess.

Wherein said elastic portion is to be bending.

Wherein include a signal in addition and handle and display unit, it is to receive and handle the signal of described sensing chip and show sense conditions that this signal is handled with display unit.

Wherein said sensing chip is to be strain gauge.

Wherein each fixture is to be screw, steady pin, rivet or clamp jaws.

Disclose main feature of the present invention according to above-mentioned, respectively this location division of the present invention protrudes from the wall of this body, when the stressed and flexural deformation of this spanner, respectively this surface, location division does not have the stress and strain generation, that is refer to that respectively this location division is to be no strain zone, respectively this sensor can firmly mutually combine with this spanner, even this spanner is repeatedly back and forth after the switching, the respectively end of this sensor and respectively still can keep the relation of original relative position between this location division, so the accuracy of sensor with reappear performance and obtain to guarantee.

In addition, respectively also can have an elastic portion that is bending between the body portion of this sensor and at least one this end, when each end of this sensor firmly is incorporated into respectively this location division respectively, when this body during because of the relative position change between crooked each end that drives sensor, can make the change correspondence of the relative position between this end respectively change into deflection (bending) distortion of the body portion of this sensor by this elastic portion, the sensing chip that is arranged on this body portion can carry out comparatively accurate sensing.

Moreover, if sensor of the present invention is arranged on body when position of neutral axis that theory of mechanics of materials is censured, then can make the body portion sectional area of this sensor long-pending less than respectively this end cross-sectional of this sensor, and this sensing chip is set in this body portion, because each end cross-sectional of this sensor is long-pending bigger, respectively this end can firmly be combined in each location division of this body, because the sectional area of this body portion is less, this body portion can obtain bigger dependent variable and straining and sensing amount again.No matter be to adopt above-mentioned the have sensor of elastic portion or the sensor that body portion sectional area amasss less than end cross-sectional, these ways just can not destroyed the marriage relation between this sensor and this body, that is all can promote the steadiness that respectively mutually combines between this sensor and this body.

In view of the above, disclosed torque spanner with sensor can keep firm relation between each sensor and the body, can reach the accuracy and the reproducible purpose of promoting torque value that sensor measures.

Description of drawings

Following conjunction with figs. is lifted some preferred embodiments, and in order to structure of the present invention and effect are elaborated, wherein each brief description of drawings is as follows, wherein:

Fig. 1 is the three-dimensional exploded view of the present invention's first preferred embodiment;

Fig. 2 is the front view of the present invention's first preferred embodiment;

Fig. 3 is the schematic diagram of the present invention's first preferred embodiment, mainly shows the deformation state of pars intermedia and sensor;

Fig. 4 is the three-dimensional exploded view of the present invention's second preferred embodiment;

Fig. 5 is the three-dimensional exploded view of the present invention's the 3rd preferred embodiment, shows that mainly two location divisions form in the state of tank lateral margin;

Fig. 6 is the three-dimensional exploded view of the present invention's the 4th preferred embodiment;

Fig. 7 is the three-dimensional combination figure of the present invention's the 4th preferred embodiment;

Fig. 8 is the front view of the present invention's the 4th preferred embodiment;

Fig. 9 is the three-dimensional exploded view of the present invention's the 5th preferred embodiment;

Figure 10 to Figure 12 implements aspect for the difference of sensor;

Figure 13 is the three-dimensional exploded view of the present invention's the 6th preferred embodiment;

Figure 14 is the three-dimensional combination figure of the present invention's the 6th preferred embodiment;

Figure 15 is the side view of the present invention's the 6th preferred embodiment;

Figure 16 is the three-dimensional exploded view of the present invention's the 7th preferred embodiment;

Figure 17 is the three-dimensional exploded view of the present invention's the 8th preferred embodiment;

Figure 18 is the three-dimensional exploded view of the present invention's the 9th preferred embodiment;

Figure 19 is the three-dimensional exploded view of the present invention's the tenth preferred embodiment;

Figure 20 is the three-dimensional exploded view of the present invention's the 11 preferred embodiment;

Figure 21 is the three-dimensional exploded view of the present invention's the 12 preferred embodiment;

Figure 22 is the three-dimensional exploded view of an existing torque spanner;

Figure 23 is the three-dimensional exploded view of another existing torque spanner; And

Figure 24 is the three-dimensional exploded view of another existing torque spanner.

The specific embodiment

Seeing also Figure 1 and Figure 2, is for the present invention's first preferred embodiment provides the spanner 10 with sensor 30, and spanner 10 includes a body 20, a sensor 30, and a fixture 38.Body 20 is to be shaft-like, body 20 1 ends have one in order to the head 21 in conjunction with sleeve, the other end has one can be for the grip part 22 of switching, one has a pars intermedia 23 with connecting between head 21 and the grip part 22, pars intermedia 23 has the sidewall 25 that a roof 24 and two is divided into roof 24 2 sides, wherein the wall of a sidewall 25 has two location divisions 26 at a distance of preset distance, each location division 26 is to extend the ground Local Convex for sidewall 25 from pars intermedia 23 one, and each location division 26 is provided with one from the recessed screw 27 of end face.

As shown in Figure 3, this sensor 30 is to be the long shaped plate sheet, and the material of sensor 30 can adopt the material that is same as body 20, in order to avoid the inconsistent caused thermal strain of the two Yin Wendu thermal expansion; Sensor 30 has two ends 31, and each end 31 has the axially identical of a perforation 32, two perforation 32.Be to interconnect between two ends 31 by the whole body portion 33, the perforation 32 of body portion 33 and two ends 31 be positioned at same axially, has an elastic portion 34 that is bending between body portion 33 and each end 31 respectively, the two side faces of body portion 33 is respectively equipped with a sensing chip 35, sensing chip 35 is to be strain gauge, two sensing chips 35 electrically connect a signal of being located at body 20 and handle and display unit 36, each sensing chip 35 can be responded to the deflection of body portion 33 and produce electrically variation, utilizes the signal processing with display unit 36 the electrical variation of sensing chip 35 to be changed through computing again and demonstrates torque value.Sensor 30 is two location divisions, 26 end faces that are connected to body 20 with two ends 31 respectively, make between body portion 33 and elastic portion 34 and the body 20 at a distance of preset distance, by this fixture 38 sensor 30 is incorporated into body 20 again, in present embodiment, fixture 38 is to be two-screw 39, what each screw 39 was arranged in sensor 30 respectively bores a hole 32, and screws togather the screw 27 of location division 26, and body 20 and sensor 30 are together with each other.

Via above-mentioned explanation, head 21 installings one sleeve (not shown) when spanner 10, and when being used for the switching bolt, just as shown in Figure 3, body 20 structures can produce strain because of being subjected to the effect of switching power, and pars intermedia 23 is and then distortion also, because location division 26 of the present invention is to protrude from sidewall 25, according to the ess-strain theory of the mechanics of materials, these 26 surfaces, location division that protrude from sidewall 25 do not have strain and take place; Also even spanner before stressed, the surface of location division 26 is the plane, then spanner stressed after, the surface of location division 26 still is the plane, utilize two-screw 39 that sensor 30 is combined with body 20 again, can not produce wriggling or relative slip between two ends 31 of sensor 30 and each location division 26, that is each location division 26 can firmly be fixed in two ends 31 of sensor 30, this firm marriage relation has been arranged, even spanner is applied switching power more than 10 time back and forth, pars intermedia 23 is subjected to the effect of switching power and when being out of shape, the relative position relation of sentencing 20 of the sensor 30 of 39 combinations of two-screw and bodies in two location divisions 26 still can keep original relation always, so the sensing precision of sensor 30 and reappearance all can obtain to keep.

The present invention's mentioned spanner structure in the prior art, when spanner 10 carries out the work of switching bolt at every turn, because sensor 30 is the location divisions 26 that are fixed on body 20, and can be along with the pars intermedia 23 corresponding distortion of body 20, when 31 relative positions in each end of each location division 26 drive sensor 30 change, the elasticity of utilizing the elastic portion 34 of sensor 30 to be had, can make the change correspondence of the relative position of 31 of each ends change into the flexural deformation of body portion 33, in other words, each sensing chip 35 that is arranged at body portion 33 can correctly sense the relative position change amount of 31 of each ends, also get final product the torque value of sensing spanner 10, the present invention is had the cushioning effect of elastic portion 34 by body portion 33, can make each end 31 of sensor 30 avoid being subjected to brute force and pull effect, and then sliding phenomenon can not take place between each end 31 of location division 26 and the body 20, can keep firm relation between sensor 30 each end 31 and the body 20, and each sensing chip 35 of body portion 33 again can the sensing torque value, makes the accuracy of measurement and reappearance obtain to guarantee.

Comprehensively above-mentioned, the present invention utilizes sensor to be located at the location division of body, this sensor both can firmly mutually combine with wrench body, and the torque value of sensing spanner accurately again is so the present invention can promote the accuracy and the reproducible effect of torsion sensing value.

As shown in Figure 4, the torque spanner 12 that the present invention's second preferred embodiment is provided, can have two location divisions 26 respectively in two sidewalls 25 of body 20, simultaneously and two sensors 30 are divided into the location division 26 of two sidewalls 25, thus, can improve the accuracy and the reappearance of the torque value that is measured equally more.

Explanation according to the invention described above, fixture of the present invention is not limited to use screw, also can utilize steady pin, rivet, or clamp jaws mutually combines sensor and body, and sensor also can be located at a diapire of body, the location division of body and the structure of sensor can also other multi-form structure replace technical characterictic equally all according to the invention and creation spirit; As shown in Figure 5, it is the torque spanner that is provided for the present invention's the 3rd preferred embodiment, its characteristics promptly are: the sidewall 41 of body 40 has a tank 42 that is recess, so that form two location divisions 43 with respect to two lateral margins of tank 42, and sidewall 41 has a grooving 421 respectively in the outside of each location division 43, each end 45 of sensor 44 utilizes a screw 46 to be fixed in each location division 43 respectively, elastic portion 47 and body portion 48 are suspended in the tank 42 of body 40, thus, tank 42 and two groovings, 421 structures of utilizing body 40 to be had, make location division 43 structures between tank 42 and each grooving 421 can not change because of the distortion of body 40, the sensing chip 49 of being located at body portion 48 is sensing body 40 and corresponding distortion reaches goal of the invention of the present invention equally accurately.

Fig. 6 is to shown in Figure 8 for another example, it is the spanner 50 that is provided for the present invention's the 4th preferred embodiment, it mainly forms member and first preferred embodiment is roughly the same, characteristics are: each location division 52 of body 51 has a base segment 53 and from base segment 53 extended connected sections 54, base segment 53 is the sidewalls 55 that protrude from body 51 from body 51 one with extending, 54 of connected sections are generally to be the outer end that the state that is parallel to sidewall 55 extends base segment 53, and two connected sections 54 are to extend towards relative direction, and sensor 56 can be fixed between two connected sections 54 by two-screw 57.

As shown in Figure 9, it is the spanner 60 that is provided for the present invention's the 5th preferred embodiment, its composition member and the 3rd preferred embodiment are roughly the same, characteristics are: body portion 62 2 ends of sensor 61 have the elastic portion 63 that one day, same direction was extended respectively, the outer end of elastic portion 63 then respectively one be connected in end 64,65 of perforation that make body portion 62 and each end 64 are at a distance of a preset distance, when location division 67 is fixed in by screw 66 in two ends 64, but the also deflection of sensing class origin portion 62 of the sensing chip 68 of being located at body portion 62; As shown in figure 10, the structure of sensor 61 can only be the elastic portion 63 of bending in the 62 1 side settings of body portion; Or as shown in figure 11, each elastic portion 63 is respectively perpendicular between end 64 and the body portion 62; For another shown in Figure 12, each elastic portion 63 is that self 62 2 end extends to each end 64 towards different and relative direction respectively; In addition, each end of sensor can wear for two-screw as illustrated in fig. 12, and the axial of the perforation of two ends also can be extended towards different directions respectively.

Extremely shown in Figure 15 as Figure 13, it is the spanner 71 that is provided for the present invention's the 6th preferred embodiment, be characterized in being: the roof 73 of body 72 has a microscler groove 74 that is penetration state, relative two internal faces 75 of groove 74 have a location division 76 from the extension of internal face one respectively, two location divisions 76 generally are positioned at the position of neutral axis of body 72 approximately, location division 76 has a screw 77, body portion 81 sectional areas of sensor 78 are less than the sectional area at both ends 79, each location division 76 is fixed in by screw 80 respectively in two ends 79 of sensor 78, make between body portion 81 and the body 72 at a distance of preset distance, when body 72 is subjected to switching and is out of shape, because the sectional area of body portion 81 is less than the sectional area of each end 79, therefore body portion 81 part-structure that is adjacent to each end 79 can have the effect that generally is same as above-mentioned elastic portion structure, can make body portion 81 between two ends 79 corresponding to body 72 distortion equally.

As shown in figure 16, it is the spanner 84 that is provided for the present invention's the 7th preferred embodiment, its characteristics are: body 85 has the two circular recesses 87 that are depressed in roof 86, the location division 88 that can be higher or lower than roof 86 that is shaped, the bottom of each recess 87, thus, when two ends 90 of sensor 89 utilize screw 91 to be fixed in two location divisions 88, the goal of the invention of same attainable cost invention.

As shown in figure 17, be the spanner 82 that is provided for the present invention's the 8th preferred embodiment, its composition member and the 5th preferred embodiment are roughly the same, and characteristics are to be that body 83 is to be the open-end wrench form; And as shown in figure 18, it is the spanner 100 that is provided for the present invention's the 9th preferred embodiment, it is formed member and generally is same as the 6th preferred embodiment, characteristics are: the roof 102 of body 101 has a microscler grooving 103 that is recess, and relative two internal faces 104 of grooving 103 have a location division 105 that protrudes from internal face 104 respectively.Again as shown in figure 19, it is the spanner 110 that is provided for the present invention's the tenth preferred embodiment, its characteristics are: body 111 has two groovings 112, each grooving 112 forms an arcuation wall 114 in body 111, and a smooth shape wall 115, each location division 116 is to extend towards each arcuation wall 114 from each smooth shape wall 115.

As shown in figure 20, be the spanner 92 that is provided for the present invention's the 11 preferred embodiment, its structure and the 6th preferred embodiment are roughly the same, and body 93 also is the open-end wrench form, and characteristics are that then sensor 94 structures use the version of the 4th preferred embodiment instead.At last as shown in figure 21, it is the spanner 120 that is provided for the present invention's the 12 preferred embodiment, it includes a body 121, one sensor 122, and four-function is with the screw 123 of fixation of sensor 122 and body 121, characteristics are: the wall that each end 124 and the body 121 of sensor 122 is in contact with one another has two location divisions 125 that are convex, each location division 125 is perforation 126 outer rims that are located on each end 124, when sensor 122 combines with body 121, because sensor 122 only is connected to body 121 with each location division 125, when body 121 is bent and is out of shape, sensor 122 is also less with the relative slippage between the body 121, therefore also can reach goal of the invention of the present invention.

Claims

1. a torque spanner is characterized in that, includes:

One body, this body has at least one location division, and described location division is the wall that protrudes this body;

At least one sensor, described sensor has two ends, and a body portion between this two end, has an elastic portion between this body portion and at least one this end, and this body portion is provided with at least one sensing chip, and described sensing chip is in order to the deflection of this body portion of sensing; The described end of each sensor is to be located at this body, makes each end of this sensor be located at respectively this location division respectively; And

2. according to the described torque spanner of claim 1, it is characterized in that wherein the body portion of this sensor and this body are at a distance of preset distance.

3. according to the described torque spanner of claim 1, it is characterized in that wherein the sectional area of the body portion of this sensor is less than the sectional area of each end of this sensor.

4. according to the described torque spanner of claim 1, it is characterized in that wherein this body has a head and a grip part, one has a pars intermedia with being connected between this head and this grip part, and described location division is that Local Convex is for this pars intermedia.

5. according to the described torque spanner of claim 1, it is characterized in that wherein this body has a groove, described location division is the wall that protrudes from this groove.

6. according to the described torque spanner of claim 1, it is characterized in that, wherein each location division of this body has a base segment and from the extended connected section of this base segment, and this base segment is the wall that protrudes from this body with extending, and this connected section then extends the outer end of this base segment.

7. according to the described torque spanner of claim 1, it is characterized in that wherein this body has at least one recess that is depressed in the wall of this body, and each location division is that the wall towards this body extends from the bottom of described recess.

8. according to the described torque spanner of claim 1, it is characterized in that wherein said elastic portion is to be bending.

9. according to the described torque spanner of claim 1, it is characterized in that, wherein include a signal in addition and handle and display unit that it is to receive and handle the signal of these sensing chips and show sense conditions that this signal is handled with display unit.

10. according to the described torque spanner of claim 1, it is characterized in that wherein said sensing chip is a strain gauge.

11., it is characterized in that wherein each fixture is screw, steady pin, rivet or clamp jaws according to the described torque spanner of claim 1.