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CN-224202642-U - Torque calibration device

CN224202642UCN 224202642 UCN224202642 UCN 224202642UCN-224202642-U

Abstract

The utility model particularly relates to a torque calibration device which comprises a screw rod part, a shell, a nut part and a transmission part, wherein the screw rod part comprises a base body and a rod body, the rod body is arranged on the base body, the spring part is supported by the base body and sleeved on the rod body, the shell is supported by the base body and sleeved on the spring part, the nut part is movably connected with the rod body in a threaded connection mode, the transmission part is arranged between the spring part and the nut part and sleeved on the rod body, the transmission part comprises a pressure plate and a bearing arranged on the pressure plate, and the pressure plate is supported by the spring part so that the bearing rotates along with the nut part. According to the torque calibration device, the bearing in the transmission part is used for enabling the rotation friction force of the nut part in the rotation and pressing process to be resolved by the bearing, so that the spring part is only affected by the pressing force of the nut part in the rotation and pressing process, and the linear precision of the torque calibration device is improved.

Inventors

  • LIU ZIWEI
  • CHEN CUIZHEN
  • ZENG JIANXING

Assignees

  • 广西水利电力职业技术学院

Dates

Publication Date
20260505
Application Date
20250609

Claims (10)

  1. 1. A torque calibration device is characterized in that, the torque calibration device comprises: The screw rod (1), the screw rod (1) comprises a base (11) and a rod body (12), wherein the rod body (12) is arranged on the base (11); The spring piece (2), the said spring piece (2) is supported by the said base (11) and set up in the said body of rod (12); The shell (3), the said shell (3) is supported by said base (11) and set up in the said spring member (2); the nut piece (4) is movably connected to the rod body (12) in a threaded connection mode; the transmission part (5), the said transmission part (5) is set up between said spring element (2) and said nut member (4) and cover and locate the said body of rod (12); The transmission part (5) comprises a pressing plate (51) and a bearing (52) arranged on the pressing plate (51), and the pressing plate (51) is supported by the spring part (2) so that the bearing (52) rotates along with the nut part (4).
  2. 2. A torque calibration device according to claim 1, characterized in that the nut member (4) comprises a rotating disc (41) and a rotating body (42) arranged on the rotating disc (41), the rotating disc (41) is supported by the spring member (2), a part of the rotating body (42) protrudes from the housing (3), and an end of the rotating body (42) comprises a standard square hole (421).
  3. 3. A torque calibration device according to claim 2, characterized in that the end of the rotor (42) comprises a removably connected end (422), said standard square hole (421) being provided in said end (422); The standard square holes (421) comprise 1/4 holes (421 c), 3/8 holes (421 b) or 1/2 holes (421 a).
  4. 4. A torque calibration device according to claim 2, characterized in that the rotor (42) and the rotor disc (41) are integrally formed.
  5. 5. A torque calibration device according to claim 2, characterized in that the housing (3) comprises a stop member (32), the stop member (32) being arranged on the housing (3), the stop member (32) comprising a through hole (321), the through hole (321) being larger than the diameter of the rotor (42) and smaller than the diameter of the rotor disc (41).
  6. 6. A torque calibration device according to claim 5, characterized in that the limiting member (32) comprises an arc-shaped clamping ring (322), and the clamping ring (322) is accommodated in a groove (31) formed in the inner wall of the end portion of the housing (3).
  7. 7. A torque calibration device according to claim 1, characterized in that the spring element (2) comprises a disc spring (21) at low torque rates.
  8. 8. A torque calibration device according to claim 1, characterized in that at high torque rates, the spring element (2) comprises a disc spring (21) and at least two sets of shims (22) arranged between the disc spring (21) and the housing (11).
  9. 9. A torque calibration device according to claim 1, wherein the housing (11) comprises a second circular truncated cone arranged on the first circular truncated cone, and the diameter of the second circular truncated cone is smaller than that of the first circular truncated cone, so that one end of the housing (3) is clamped to the second circular truncated cone in a clearance fit manner.
  10. 10. A torque calibration device according to claim 9, characterized in that the housing (11) comprises a receiving table arranged on the other side of the first table.

Description

Torque calibration device Technical Field The utility model relates to the technical field of simulation bolts, in particular to a torque calibration device. Background According to JJF1610-2017 published by the metrological verification department, the electric and pneumatic torque wrenches must be equipped with a high torque rate simulator and a low torque rate simulator when calibrated, and the calibration requires stable simulated bolting characteristics and good linearity. In the process of calibrating the electric torque wrench and the pneumatic torque wrench, the performance of the linearity and the stability of the torque is important. Prior art cn202123381682.X discloses a simulation bolt, through the nut that is equipped with, screw up it on the body of rod for simulation nut screw up action, through the body of rod that is equipped with, be used for simulation nut screw up action, through the compact heap that is equipped with, can produce pressure drive belleville spring action to the compact heap when the nut rotates to realize the linear change of simulation bolt moment of torsion, through the belleville spring that is equipped with, belleville spring can produce deformation when the pressure change that receives, thereby realize the change of simulation bolt moment of torsion. The above-mentioned process has a problem in that the compatibility is poor because the wing nut which is arranged to be sleeved on the rod body can only be adapted to any one of the high torque rate simulator or the low torque rate simulator. Meanwhile, the nut is directly pressed on the compression block through the gasket, the butterfly nut is fixedly connected to the compression block, and the nut is influenced by the gasket and friction force between the gasket and the compression block in the rotating process, so that the linearity of the torque tested by the nut is damaged, and the calibration precision is influenced. In addition, the nut is driven and screwed by the transmission rod and the gear, so that the nut is limited in specification and the transmission rod is stressed greatly, and the problems that a spanner with various specifications cannot be adapted and the transmission mechanism is easy to damage are solved. The prior art CN107845321a discloses a hydraulic torque connection simulator, which drives a piston by hydraulic oil through a way of conducting the hydraulic oil through a channel, thereby realizing the simulation of torque, and realizes the switching between a high torque rate simulator and a low torque rate simulator by controlling the ratio relation between the pitch of a loading head and the height of a transition round table. On one hand, the sealing cost of the hydraulic oil is high, the hydraulic oil needs to be maintained and replaced regularly, so that the cost of a product is increased, and the sliding of the piston along the inner wall has requirements on the machining precision of devices. On the other hand, hydraulic oil leakage is an important cause of failure of calibration precision, and the maintenance and protection cost of the device is high. In addition, the high torque rate simulator and the low torque rate simulator depend on the height of the transition round table and the screw pitch of the screw loader, and a plurality of groups of combinations of the transition round table and the loader are needed to be provided for implementation, and the defect of complex matching exists, so that the prior art is high in maintenance cost and matching cost. Therefore, the simulation bolt for torque calibration in the prior art has the technical problems that the high-torque rate simulator and the low-torque rate simulator are difficult to be compatible or the compatibility cost is high, and the linear precision is influenced by the traditional disc spring contact mode. Meanwhile, the prior art has the defects of more transmission intervals between the nut and the spring, no anti-drop design of the nut and the like no matter in mechanical fixed connection type or hydraulic transmission type. Disclosure of utility model Aiming at the technical problems that in the prior art, a high torque rate simulator and a low torque rate simulator are difficult to be compatible or have higher compatible cost, the linear precision is influenced by a traditional disc spring contact mode, the transmission interval between a nut and a spring is more, the nut has no anti-drop design and the like, the utility model provides a torque calibration device which at least has the advantages of low cost, good compatibility, high linear precision, strong stability and the like. The utility model provides a torque calibration device, which comprises: the screw rod comprises a seat body and a rod body, wherein the rod body is arranged on the seat body; The spring piece is supported by the base body and sleeved on the rod body; The shell is supported by the base body and sleeved on the spring piece; the nut piece i