CN201079942Y - Hydraulic Digital Torque Wrench - Google Patents

Abstract

A hydraulic digital torque wrench comprises a head section and a handle section, wherein the head section comprises a working end and a combining end, a first pivot and a second pivot are fixedly arranged on two sides of the combining end respectively, a first hollow part and a second hollow part are concavely arranged on two sides of the end surface of the combining end respectively, the first pivot extends into the first hollow part, and the second pivot extends into the second hollow part; the handle section comprises a pivot end and a long cylindrical holding part, the pivot end is pivoted on a first pivot of the head section, a gap is reserved between the pivot end and a second pivot of the head section, a hydraulic cylinder is fixedly arranged at the pivot end corresponding to the second pivot of the head section, one end of a connecting rod is pivoted at one end of the hydraulic cylinder facing the head section, the other end of the connecting rod is pivoted on the second pivot of the head section, the other end of the hydraulic cylinder is connected with a pressure sensor, the pressure sensor is electrically connected with a torsion conversion display, the torsion conversion display comprises a display screen exposed out of the surface of the handle section, and the torsion conversion display is electrically connected with a battery, so that the utility model discloses can reach accurate torsion measurement.

Description

Hydraulic Digital Torque Wrench

technical field

The invention relates to a hand tool, especially a hydraulic digital torque hand tool, which can improve the accuracy of torque measurement.

Background technique

When the existing digital torque hand tools measure torque, most of them use strain components such as strain gauges to connect and combine with the tool handle, so that when the hand tool is subjected to torque and the handle deforms, the strain components will also deform along with the handle. The resulting resistance change can be converted into the torque borne by the hand tool by measuring the resistance change, and then achieve the function of displaying or warning the torque value.

However, in the manufacturing process of the existing digital torque hand tools, the raw steel materials are often subjected to different heat treatments according to the characteristics of different hand tools, resulting in different hardness of the hand tools, and the material thickness of various hand tools is also different. It is different, and it is difficult to control the environmental temperature difference when the hand tool is used, which will cause accuracy errors when the hand tool measures the torque. Due to the lack of accuracy of the existing digital torque hand tools, they are mostly used by ordinary users for daily use or DIY tools, and cannot be used as high-accuracy tools for professional use. The scope of application is limited.

Utility model content

In view of the lack of accuracy of existing digital torque hand tools, the purpose of the present invention is to provide a hydraulic digital torque wrench, which can improve the accuracy of torque measurement and further expand the application range of torque hand tools.

In order to achieve the above object, the hydraulic digital torque wrench of the present invention includes:

A hydraulic digital torque wrench, comprising:

A head section, the head section includes a working end and a joint end, a first pivot and a second pivot are respectively fixed on both sides of the joint end. a hollowed out part and a second hollowed out part, the first pivot extends in the first hollowed out part, and the second pivot extends in the second hollowed out part; and

A handle section, the handle section includes a pivot end and a grip part, the grip part is long column, the pivot end is pivoted on the first pivot of the head section, and the pivot end is connected to the head There is a gap between the second pivots of the section, and a hydraulic cylinder is fixed at the pivotal end corresponding to the second pivot of the head section, and the hydraulic cylinder is pivoted to one end of a connecting rod toward the end of the head section. The other end of the rod is pivoted on the second pivot of the head section, the other end of the hydraulic cylinder is connected with a pressure sensor, and the pressure sensor is electrically connected with a torque conversion display, and the torque conversion display includes a A display screen, the torque conversion display is electrically connected with a battery.

Preferably, one side of the pivot end of the handle segment is protrudingly provided with a pivot piece, and the pivot piece is pivotally arranged on the first pivot of the head section, and the other side of the pivot end corresponds to the position of the head section. On the side with the second pivot, the end surface of this side is concavely provided with an accommodating groove, and the hydraulic cylinder and the pressure sensor are fixedly arranged in the accommodating groove.

Preferably, the torque conversion display and the battery are arranged inside the handle.

Preferably, the end surface of the joint end of the head section is inclined relative to the extending direction of the head section, and the end surface of the pivot end of the handle section is inclined relative to the extending direction of the handle section.

The specific effects that the utility model can achieve include:

1. Since the utility model does not use the resistance change caused by the deformation of the hand tool itself to measure the torque, but uses the pressure change of the hydraulic cylinder to measure the torque, it is not easy to measure the torque due to the difference in hardness and thickness of the material and the change of the ambient temperature The advantages of error, so the torque measurement of the utility model has the characteristics of high accuracy.

2. Since the utility model can perform high-accuracy torque measurement, it can not only be applied to the DIY use of general users, but also can be applied to professional application fields, even in the test application range that requires extremely high accuracy. a seat.

Description of drawings

Fig. 1 is a three-dimensional schematic view of a preferred embodiment of the present invention.

Fig. 2 is a schematic top view of a preferred embodiment of the present invention.

Fig. 3 is a schematic cross-sectional view of a preferred embodiment of the utility model when the handle section is pivoted relative to the head section.

Fig. 4 is a three-dimensional schematic view of another preferred embodiment of the present invention.

[Description of main component symbols]

(10) Head section (11) Working end

(12) Joint end (121) First pivot

(122) Second Pivot (123) First Hollowout

(20) Handle section (21) Pivot end

(22) Grip (23) Hydraulic cylinder

(24) Connecting rod (25) Pressure sensor

(26) Torque conversion display

(27) Battery (28) Pivot piece

(29) Storage tank

Detailed ways

Please refer to FIG. 1 and FIG. 2, the preferred embodiment of the present invention includes a head section 10 and a handle section 20 pivotally arranged on the head section 10, wherein;

The head section 10 includes a working end 11 and a joint end 12. The working end 11 can be sleeved on a fixing member such as a nut or a screw to rotate and lock the fixing member. A first pivot 121 and a second pivot 122; preferably, the end surface of the joint end 12 is inclined relative to the direction in which the head section 10 extends, so that there is a mutual pivot between the head section 10 and the handle section 20 The two sides of the end surface of the joint end 12 are respectively recessed with a first hollowed out part 123 and a second hollowed out part 124, the first pivot 121 extends in the first hollowed out part 123, and the second pivot 122 extends in the second hollow part 124;

The handle section 20 includes a pivot end 21 and a long cylindrical grip portion 22, the pivot end 21 is pivotally arranged on the first pivot 121 of the head section 10, and the pivot end 21 and the head section 10 There is a gap between the second pivots 122, so that the handle section 20 can pivot relative to the head section 10, and the pivot end 21 is fixed with a hydraulic cylinder 23 corresponding to the second pivot 122 of the head section 10. One end of the cylinder 23 facing the head section 10 is pivotally arranged on one end of a connecting rod 24, and the other end of the connecting rod 24 is pivotally arranged on the second pivot 122 of the head section 10, whereby when the handle section 20 is relative to the head section 10 pivots to make the hydraulic cylinder 23 move towards the head section 10, the connecting rod 24 applies pressure to the liquid in the hydraulic cylinder 23, and the other end of the hydraulic cylinder 23 is connected with a pressure sensor 25, which can sense the liquid in the hydraulic cylinder 23. Pressure change, the pressure sensor 25 is electrically connected with a torque conversion display 26, and the pressure change sensed by the pressure sensor 25 can be transmitted to the torque conversion display 26 and converted into a torque value. The torque conversion display 26 includes a The display screen on the surface of the handle section 20 can display the torque value for the user's reference. The torque conversion display 26 is electrically connected with a battery 27 to provide the power required for the operation of the torque conversion display 26;

Preferably, the end surface of the pivoting end 21 is inclined relative to the direction in which the handle section 20 extends, and a pivoting piece 28 protrudes from one side of the pivoting end 21, and the pivoting piece 28 is pivotally mounted on the head section. On the first pivot 121 of 10, the other side of the pivot end 21 corresponds to the side on which the second pivot 122 is provided on the head section 10, and the end surface of this side is concavely provided with an accommodating groove 29, the hydraulic cylinder 23 and the pressure sensor 25 are fixed in the accommodating groove 29, the torque conversion display 26 and the battery 27 are arranged inside the handle section 20, the torque conversion display 26 can preset a torque upper limit, when the utility model is preferably implemented For example, when the applied torque exceeds the upper limit of the torque, the torque conversion display 26 can send a warning signal such as a sound or a light, so as to prevent the user from applying excessive torque on the fixing member and damaging the fixing member.

Please refer further to Fig. 3, when the preferred embodiment of the present invention is in use, the working end 11 of the head section 10 can be sleeved on a fixing piece, and the elongated cylindrical holding part of the handle section 20 can be held 22 apply force to rotate, the elongated cylindrical shape of this grip part 22 can make the preferred embodiment of the present utility model easier to apply force, at this moment the handle section 20 promptly pivots relative to the head section 10, and drives the connecting rod 24 to apply pressure For the liquid in the hydraulic cylinder 23, after the pressure sensor 25 senses the change in the hydraulic pressure of the hydraulic cylinder 23, the signal will be sent to the torque conversion display 26, and the torque value will be displayed on the display screen. At this time, the user can easily know The amount of torque applied to the fixture.

Because the preferred embodiment of the present utility model does not use the deformation of the hand tool itself to measure the torque, but uses the pressure change of the hydraulic cylinder 23 to measure the torque, it is not easy to cause torque measurement errors due to the difference in hardness and thickness of the material and the change in the ambient temperature Therefore, the torque measurement of the preferred embodiment of the utility model has the characteristics of high accuracy, which can be applied to professional application fields, and even has a place in the test application range that requires extremely high accuracy.

Please further refer to Figure 4, the preferred embodiment of the present utility model can be applied to the design of various hand tools, such as the working end 11 of the head 10 is a ratchet wrench, in another preferred embodiment, the head 10A The working end 11 can also be a general wrench and a non-fixed hand tool with a replaceable tool head. All tools that need to measure the torque value for locking the fixture are applicable, and are not limited to the preferred ones of the present utility model. The scope described in the examples.

Claims (4)

1. a hydraulic type digital torsion spanner is characterised in that, comprising:

A section, this section comprises a working end and a binding end, these binding end both sides are installed with one first pivot and one second this section of pivot respectively, the end face both sides of this binding end are concaved with one first cavern part and one second cavern part respectively, first pivot extends in first cavern part, and second pivot extends in second cavern part;

And

One handle section, this handle section comprises a pivot end and a grip part, this grip part is a long column shape, this pivot end is hubbed on first pivot of head section, and leave the space between second pivot of this pivot end and head section, this pivot end is installed with a hydraulic cylinder corresponding to this section second pivot place, this hydraulic cylinder is hubbed at an end of a connecting rod towards an end of head section, the other end of this connecting rod is hubbed on second pivot of this section, the other end of hydraulic cylinder is connected with a pressure sensor, pressure sensor and a torsion crossover display terminal electrically connect, and this torsion crossover display terminal includes a display screen that is exposed to the handle section surface, this torsion crossover display terminal and battery electric connection.

2. hydraulic type digital torsion spanner as claimed in claim 1, be characterised in that, one side of this handle section pivot end convexes with the sheet that is pivoted, this sheet that is pivoted is hubbed on first pivot of this section, the opposite side of this pivot end is provided with a side of second pivot corresponding to this section, the end face of this side is concaved with a storage tank, and this hydraulic cylinder and pressure sensor are fixedly arranged in this storage tank.

3. hydraulic type digital torsion spanner as claimed in claim 2 is characterised in that, this torsion crossover display terminal and battery are arranged at the handle intersegmental part.

4. as the described hydraulic type digital torsion spanner of claim 1,2 or 3, be characterised in that the direction that the end face of this section binding end extends with respect to the head section is inclination, the direction that the end face of this handle section pivot end extends with respect to the handle section is inclination.

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