CN214538352U - Electric torque wrench and pneumatic torque wrench calibrating device - Google Patents

Abstract

The utility model relates to an electronic moment of torsion spanner, pneumatic moment of torsion spanner calibrating device, including the device frame, be provided with bolt simulator and torque sensor on the device frame, torque sensor's moment of torsion output links to each other with bolt simulator's moment of torsion input, still is provided with spanner fixture on the device frame, and spanner fixture includes that at least a pair of be used for the centre gripping treats the holder of the moment of torsion spanner of calibration, and the moment of torsion output of the moment of torsion spanner centre gripping so that treat the calibration is connected with torque sensor's moment of torsion input coaxial line to the holder. The utility model provides a handheld moment of torsion spanner among the prior art and the difficult technical problem who guarantees the moment of torsion output and the torque sensor coaxial line of moment of torsion spanner.

Description

Electric torque wrench and pneumatic torque wrench calibrating device

Technical Field

The utility model relates to an electronic moment of torsion spanner, pneumatic moment of torsion spanner calibrating device among the spanner calibration field.

Background

The electric torque wrench and the pneumatic torque wrench are two common wrenches capable of outputting set torque, when the wrench is used, the output torque is set, then the torque is output outwards to work, and when the output torque is reached, the whole wrench stops working.

According to corresponding calibration standards, the set output torques of the electric torque wrench and the pneumatic torque wrench need to be calibrated. Specifically, the method comprises the following steps. Chinese patent CN210243073U discloses a "bolt simulator and a torque wrench calibration device using the same", wherein the calibration wrench calibration device includes a bolt simulator, which is a mechanism capable of simulating the connection of a bolt and a nut, thereby generating rotational resistance. When the torque wrench is calibrated, an operator holds the torque wrench, the torque wrench is connected with a torque input structure of the bolt simulator through the torque sensor, the output torque of the torque wrench is set, and the torque wrench is calibrated according to the reading comparison of the output torque and the torque sensor. The existing torque wrench calibrating device has the problems that: the handheld torque wrench of operating personnel carries out calibration operation, the weight of electronic torque wrench and pneumatic torque wrench is not light, and electronic torque wrench, pneumatic torque wrench also is not symmetrical structure, consequently hardly guarantee that the output and the torque sensor of torque wrench are concentric, will lead to the production of skew force like this, influence torque sensor's reading, thereby the influence is to the calibration precision of torque wrench, in addition, operating personnel's handheld effort is limited, can't hold the torque wrench sometimes, cause unable accurate measurement.

Disclosure of Invention

An object of the utility model is to provide an electronic moment of torsion spanner, pneumatic moment of torsion spanner calibrating device to solve among the prior art handheld moment of torsion spanner and the difficult technical problem who guarantees the moment of torsion output and the torque sensor coaxial line of moment of torsion spanner.

In order to solve the technical problem, the technical scheme of the utility model as follows:

the utility model provides an electronic moment of torsion spanner, pneumatic moment of torsion spanner calibrating device, including the device frame, be provided with bolt simulator and torque sensor on the device frame, torque sensor's moment of torsion output end links to each other with bolt simulator's moment of torsion input end, still be provided with spanner fixture on the device frame, spanner fixture includes at least a pair of holder that is used for the centre gripping to treat the moment of torsion spanner of calibration, the moment of torsion spanner centre gripping that the calibration was treated to the holder so that treat the moment of torsion output of the moment of torsion spanner of calibration and torque sensor's moment of torsion input coaxial line connection.

Two clamping pieces in the pair of clamping pieces are symmetrically arranged on two sides of the axis of the torque sensor, and the two clamping pieces in the pair of clamping pieces can synchronously move oppositely and backwards under the clamping piece driving mechanism.

The clamping piece driving mechanism comprises a lead screw with a forward transmission thread and a reverse transmission thread, and two clamping pieces in the pair of clamping pieces are in transmission fit with the forward transmission thread and the reverse transmission thread respectively.

The wrench clamping mechanism comprises two pairs of clamping pieces for clamping a torque wrench to be calibrated, and each pair of clamping pieces are arranged at intervals along the extension direction of the axis of the torque sensor.

The length of the clamp positioned away from the torque sensor is longer than the length of the clamp positioned close to the torque sensor.

The wrench clamping mechanism comprises three pairs of clamping pieces for clamping the torque wrench, wherein two pairs of clamping pieces are used for clamping and fixing the gun body of the torque wrench, and the other pair of clamping pieces are used for clamping and fixing the handle of the torque wrench

The device frame comprises a vertical installation plate which is vertically arranged, the bolt simulator, the torque sensor and the wrench clamping mechanism are all arranged on the side surface of the vertical installation plate, and two clamping pieces in the pair of clamping pieces are vertically arranged.

The utility model has the advantages that: the utility model discloses in, the bolt simulator, torque sensor and spanner fixture all set up on the mount pad, during the use, will treat the moment of torsion spanner centre gripping of calibration between corresponding a pair of holder, undertake the counter-force of moment of torsion spanner during operation through the holder, simultaneously and fix a position the moment of torsion spanner through the holder, make the moment of torsion output of moment of torsion spanner arrange with torque sensor's torque input end coaxial line, just so can not appear because the manual operation problem, and make the moment of torsion spanner exert oneself to torque sensor off-centre, thereby guaranteed that torque sensor can accurately read out the output torque of moment of torsion spanner, the calibration precision to the moment of torsion spanner has been guaranteed.

Drawings

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

FIG. 2 is a schematic view of the structure of the wrench holding mechanism of FIG. 1;

FIG. 3 is a schematic view of the wrench clamping mechanism and the torque wrench;

FIG. 4 is a schematic view of the wrench clamping mechanism and the torque wrench according to embodiment 2 of the present invention;

fig. 5 is a schematic structural view of embodiment 3 of the present invention.

Detailed Description

The utility model discloses embodiment 1 of well electronic moment of torsion spanner, pneumatic moment of torsion spanner calibrating device is shown as figure 1~ 3: the device comprises a device frame, wherein the device frame comprises a device frame bottom plate 3 and an installation vertical plate 7 fixed on the device frame bottom plate, a bolt simulator 4, a torque sensor 8 and a wrench clamping mechanism are sequentially arranged on one side surface of the installation vertical plate 7 from left to right, the bolt simulator comprises a rotating piece 5 and a first grinding piece 6 and a second grinding piece 17 which are arranged along the circumferential direction of the rotating piece at intervals, and the torque input end of the bolt simulator is arranged on the rotating piece. The periphery of the rotating part is provided with a rotating part force transmission surface 9, the inner wall of each grinding part is provided with a grinding part force transmission surface which is matched with the rotating part force transmission surface in a rotating contact manner, the rotating part force transmission surface is a revolution surface taking the axis of the rotating part as a revolution axis, and the grinding part is provided with a loading end which is used for being loaded by a corresponding loading mechanism (not shown in the figure) in a radial direction. Bolt simulator belongs to prior art, and other concrete structure are not detailed here again, and torque sensor's torque output end links to each other with the torque input of bolt simulator 4, is connected with standard torque measurement appearance 2 on the torque sensor 8, and torque measurement appearance can show torque sensor 8's torque detection reading.

The wrench clamping mechanism comprises a mechanism seat 14 fixed on the mounting vertical plate, the mechanism seat 14 is of a plate-shaped structure, two pairs of clamping pieces 15 arranged left and right are arranged on the mechanism seat, two clamping pieces in each pair of clamping pieces are arranged up and down, each clamping piece comprises a clamping plate 12 with the length perpendicular to the side face of the mounting force plate, the length of the clamping plate of the clamping piece close to the right is longer than that of the clamping piece close to the left, and the clamping plate on the right can conveniently clamp the handle part of the torque wrench 13. Two clamping pieces in the pair of clamping pieces are symmetrically arranged on two sides of the axis of the torque sensor, and the two clamping pieces in the pair of clamping pieces can synchronously move oppositely and backwards under the clamping piece driving mechanism. The clamping piece driving mechanism comprises a lead screw 10 with a forward transmission thread and a reverse transmission thread, two clamping pieces in a pair of clamping pieces respectively comprise nut blocks 16 in transmission fit with the forward transmission thread and the reverse transmission thread, the nut blocks 16 are assembled on the mechanism base 14 in a guiding and moving mode along the up-down direction, and the nut blocks 16 are fixed with corresponding clamping plates together. The upper end of the screw rod is provided with a hand wheel 11 for torque input, and the hand wheel can be rotated to control the pair of clamping pieces to move relatively or move backwards. The utility model provides a moment of torsion output, moment of torsion input are corresponding square tenon, square tenon hole structure.

When the device is used, as shown in fig. 1, an electric torque wrench or a pneumatic torque wrench is hereinafter referred to as a torque wrench to be calibrated, the torque wrench 13 to be calibrated is horizontally arranged between corresponding clamping plates of two pairs of clamping pieces, corresponding hand wheels are respectively rotated, two clamping plates in a corresponding pair of clamping pieces move relatively, the torque wrench to be calibrated is clamped, meanwhile, the height position of the torque wrench can be changed, when the height difference between the torque output end of the torque wrench to be calibrated and the torque input end of a torque sensor is not much consistent, the torque output end of the torque wrench to be calibrated is manually inserted into the torque input end of the torque sensor, and then the corresponding hand wheels are continuously screwed, so that the torque wrench to be calibrated is fixed.

The torque output value of the torque wrench to be calibrated is set, the torque wrench to be calibrated outputs torque to the bolt simulator through the torque sensor, and the torque wrench can be calibrated according to the reading of the torque sensor. In other embodiments of the present invention, the relative movement or the backward movement between the two clamping members of the pair of clamping members can be realized by an electric driving mechanism; certainly, the mounting vertical plate can also be arranged, at the moment, the clamping plate can be vertically placed, and when the torque wrench needs to be calibrated, the torque wrench is vertically placed; when the calibrating device is only used for calibrating the torque wrenches of the same model, the distance between the two clamping pieces in the pair of clamping pieces can not be adjusted because the thickness sizes of the torque wrenches of the same model are consistent, and the distance between the two clamping pieces in the pair of clamping pieces is matched with the thickness of the torque wrenches to be calibrated in design.

Embodiment 2 of the electric torque wrench, pneumatic torque wrench calibrating device is shown in fig. 4: embodiment 2 differs from embodiment 1 in that the wrench holding mechanism comprises three pairs of said holding members 15 for holding the torque wrench, wherein two pairs of holding members are used for holding and fixing the gun body of the torque wrench, and the other pair of holding members is used for holding and fixing the handle of the torque wrench, and the gun body is the part perpendicular to the handle on the torque wrench. The clamping plate 12 of the clamping member for clamping the torque wrench handle is a folded plate structure as shown in fig. 4, and by holding the torque wrench handle, the position can generate a large resistance torque, so that the shell of the torque wrench is prevented from rotating under the reaction force in the calibration process.

Embodiment 3 of the electric torque wrench, pneumatic torque wrench calibrating device is shown in fig. 5: embodiment 3 is different from embodiment 1 in that the mounting vertical plate 7 is provided with a guide rail groove extending in the left-right direction in the guiding direction, the torque sensor 8 and the wrench holding mechanism 40 are both disposed on the moving plate 41, the moving plate 41 is movably matched with the guide rail groove 42 in the guiding direction, a displacement compensation spring 43 is disposed between the right side of the moving plate 41 and the device frame, and the displacement compensation spring 43 is used for applying an acting force to the moving plate 41 in the left direction. The bolt simulator 4 in this embodiment is different from the bolt simulator in embodiment 1, the bolt simulator includes a screw 44 and a disc spring 45, when a torque is applied to the screw 44, the screw moves to the left to compress the disc spring 45, and the screw generates a displacement to the left, so in this embodiment, the torque sensor 8 and the wrench clamping mechanism 40 are both installed on a movable plate 41 capable of moving to the left and right, when the screw moves to the left, the displacement compensation spring 43 drives the movable plate 41 to move to the left to compensate a displacement amount generated by the movement of the screw, so that a pressure in the left and right directions between the bolt simulator and the torque sensor and between the torque sensor and the torque wrench is not greatly changed, thereby ensuring accuracy of calibration data.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (7)

1. The utility model provides an electronic moment of torsion spanner, pneumatic moment of torsion spanner calibrating device, includes the device frame, is provided with bolt simulator and torque sensor on the device frame, and torque sensor's torque output end links to each other its characterized in that with the moment of torsion input of bolt simulator: the device frame is also provided with a wrench clamping mechanism, the wrench clamping mechanism comprises at least one pair of clamping pieces used for clamping the torque wrench to be calibrated, and the clamping pieces clamp the torque wrench to be calibrated so that the torque output end of the torque wrench to be calibrated is coaxially connected with the torque input end of the torque sensor.

2. The electric torque wrench, pneumatic torque wrench calibrating device according to claim 1, wherein: two clamping pieces in the pair of clamping pieces are symmetrically arranged on two sides of the axis of the torque sensor, and the two clamping pieces in the pair of clamping pieces can synchronously move oppositely and backwards under the clamping piece driving mechanism.

3. The electric torque wrench, pneumatic torque wrench calibrating device according to claim 2, wherein: the clamping piece driving mechanism comprises a lead screw with a forward transmission thread and a reverse transmission thread, and two clamping pieces in the pair of clamping pieces are in transmission fit with the forward transmission thread and the reverse transmission thread respectively.

4. The electric torque wrench, pneumatic torque wrench calibrating device according to claim 2, wherein: the wrench clamping mechanism comprises two pairs of clamping pieces for clamping a torque wrench to be calibrated, and each pair of clamping pieces are arranged at intervals along the extension direction of the axis of the torque sensor.

5. The electric torque wrench, pneumatic torque wrench calibrating device according to claim 4, wherein: the length of the clamp positioned away from the torque sensor is longer than the length of the clamp positioned close to the torque sensor.

6. The electric torque wrench, pneumatic torque wrench calibrating device according to claim 4, wherein: the wrench clamping mechanism comprises three pairs of clamping pieces for clamping the torque wrench, wherein the two pairs of clamping pieces are used for clamping and fixing the gun body of the torque wrench, and the other pair of clamping pieces are used for clamping and fixing the handle of the torque wrench.

7. The electric torque wrench and pneumatic torque wrench calibrating device according to any one of claims 1 to 6, wherein: the device frame comprises a vertical installation plate which is vertically arranged, the bolt simulator, the torque sensor and the wrench clamping mechanism are all arranged on the side surface of the vertical installation plate, and two clamping pieces in the pair of clamping pieces are vertically arranged.

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