Torque value prompting device, method and torque wrench

Abstract

The application relates to a torque value prompting device and method of a torque wrench and the torque wrench, belonging to the technical field of electronic circuits, which comprises a torque acquisition module, a control module and a knocking module.The torque acquisition module is used for converting the torque value of the torque wrench into a torque signal; the control module outputs a knocking control signal in response to the value of the torque signal reaching a preset torque signal value; the torque input end is connected to the torque output end of the torque acquisition module; the knocking module emits a knocking sound in response to the knocking control signal; and the control signal receiving end is connected to the control signal output end of the control module. The operator can hear the knocking sound when the torque signal reaches the preset torque signal value. The application has the effect of facilitating the prompting of the operator to stop the force.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic circuits, and in particular to a torque wrench torque value prompting device, method and torque wrench. BACKGROUND

[0002] The torque wrench refers to a wrench that allows an operator to apply a specific torque value. According to different use scenarios, a torque wrench with an appropriate range is selected, and it has a wide range of applications in large automobile, home appliance factory and other production lines. The wrench mainly consists of a torque adjusting mechanism, a mechanical tripping mechanism, a locking mechanism, a ratchet head, a wrench housing and a handle.

[0003] At present, when using a torque wrench to apply torque, the required torque value is usually set first. When the operator turns to the required torque value, the mechanical tripping mechanism in the torque wrench produces a knocking sound and a slight vibration feeling to prompt the operator to stop applying force. Since the mechanical tripping mechanism is used to prompt the stop of force application, errors are easily generated when the operator does not operate normally. Therefore, in scenarios with high precision requirements, an electronic torque wrench is usually used, and the torque value can be displayed in real time on the display screen, so that the operator can accurately apply the required torque value. However, when using the electronic torque wrench, the operator needs to constantly monitor the display screen to ensure that the force is applied to the preset torque value, which is easy to cause visual fatigue of the operator, thereby making it inconvenient to prompt the operator when the operator uses the torque wrench to apply the preset torque value. SUMMARY

[0004] In order to facilitate prompting the operator when the torque value reaches the preset value, the present application provides a torque wrench torque value prompting device, method and torque wrench.

[0005] In a first aspect, the present application provides a torque wrench torque value prompting device, which adopts the following technical solution:

[0006] A torque wrench torque value prompting device, comprising

[0007] A torque acquisition module for converting the torque value of the torque wrench into a torque signal;

[0008] A control module that, in response to the value of the torque signal reaching a preset torque signal value, outputs a knocking control signal, and the torque input end is connected to the torque output end of the torque acquisition module;

[0009] A knocking module that, in response to the knocking control signal, emits a knocking sound, and the control signal receiving end is connected to the control signal output end of the control module.

[0010] By adopting the technical scheme, the torque signal of the torque wrench is acquired by the torque acquisition module, when the torque signal reaches the preset torque signal value, the knocking control signal for controlling the knocking module to emit the knocking sound is output, the control module is adopted to output the knocking control signal with better accuracy, and the operator can hear the knocking sound when the torque signal reaches the preset torque signal value under the premise of ensuring the accuracy, so as to prompt the operator to stop applying force.

[0011] Optionally, the torque wrench further comprises a communication module and a storage module.

[0012] The storage module is configured to record basic data of the torque wrench according to a preset operator-post mapping table, a post-wrench serial number mapping table and the torque signal.

[0013] The communication module is configured to determine whether the communication is normally connected, and if so, transmit the basic data.

[0014] By adopting the technical scheme, the basic data of the torque wrench is recorded by the storage module, and the basic data is transmitted under the condition that the communication is normally connected by the communication module, so that the effect of conveniently retaining and transmitting the basic data of the torque wrench is achieved.

[0015] Optionally, the basic data of the torque wrench comprises a wrench serial number, an operator, a date, a torque value corresponding to the torque signal and a torque value unit.

[0016] By adopting the technical scheme, the wrench serial number, the operator, the date, the torque value corresponding to the torque signal and the torque value unit are recorded, so that the use of the wrench is conveniently recorded.

[0017] Optionally, the torque wrench further comprises an alarm module, and the alarm module is configured to determine whether the torque signal is within an error range of the preset torque signal value, and if not, generate an alarm signal.

[0018] By adopting the technical scheme, when the torque signal is not within the error range of the preset torque signal, it indicates that there is a large error between the actual torque value applied by the torque wrench and the required torque value, and the alarm signal is output to prompt the operator to apply a suitable torque value.

[0019] Optionally, the knocking module comprises a rod body, an iron core, a metal coil and a winding roller, the metal coil is spirally wound on the winding roller, and the metal coil is connected to the control module; the winding roller is provided with an accommodating hole penetrating along the axial direction, the iron core is slidingly arranged at the accommodating hole of the winding roller, and the magnetic field generated after the metal coil is energized can drive the iron core to move towards the rod wall of the rod body and knock.

[0020] By adopting the technical scheme, the metal coil is spirally wound on the winding roller, so that a magnetic field is generated near the metal coil after the metal coil is electrified, the iron core at the axis of the winding roller is magnetized, the magnetic field can drive the iron core to be attracted to the wall of the rod body, the iron core hits the wall of the rod body to generate a hitting sound and cause slight vibration of the rod body, and the operator is prompted to stop applying force.

[0021] Optionally, the knocking module further comprises a reset spring and a baffle, the baffle is arranged at one end of the iron core, one end of the reset spring is arranged at one end of the winding roller close to the baffle, and the other end of the reset spring is arranged on the baffle; the elastic potential energy of the reset spring is smaller than the magnetic field energy generated after the metal coil is electrified.

[0022] By adopting the technical scheme, when the iron core moves to the wall of the rod body, the reset spring moves to the end close to the winding roller, so that the reset spring is in a compressed state, when the magnetic field disappears, the iron core is not magnetized and is no longer attracted to the wall of the rod body, at this time, the reset spring drives the iron core to move away from the winding roller, and the reset spring is in a decompressed state.

[0023] Optionally, the torque acquisition module comprises a strain gauge, the strain gauge is in contact with the ratchet head of the torque wrench, and is used to convert mechanical deformation generated by the torque of the ratchet head into a torque signal for output.

[0024] By adopting the technical scheme, the strain gauge has the advantages of small size and high accuracy, and the strain gauge is used to collect the torque signal, on the one hand, the size of the torque wrench is limited, and the strain gauge is convenient to install in the torque wrench, and on the other hand, the demand for high accuracy of the torque wrench can be met.

[0025] Optionally, the control module comprises an amplifier, an AC-DC conversion circuit, a controller and a switching device.

[0026] The amplifier has an input end connected to the torque input end of the control module and an output end connected to the input end of the AC-DC conversion circuit.

[0027] The controller is used to control the opening and closing of the switching device, has an input end connected to the output end of the AC-DC conversion circuit and an output end connected to the switching device.

[0028] The switching device is connected to the control signal output end of the control module and is used to turn on or turn off the knocking module.

[0029] By adopting the technical scheme, the torque signal is amplified by the amplifier, the amplified torque signal is transmitted to the AC-DC conversion circuit, the torque signal is converted into direct current, the controller receives the direct current torque signal to control the opening and closing of the switching device, and then the switching device turns on or turns off the knocking module, so that the knocking effect of the knocking module is realized.

[0030] In a second aspect, the application provides a torque value prompting method of a torque wrench, which adopts the following technical scheme:

[0031] The torque value prompting method of the torque wrench is applied to the torque value prompting device as described above, and comprises the following steps:

[0032] Obtaining a torque signal of the torque wrench;

[0033] In response to the value of the torque signal reaching a preset torque signal value, outputting a knocking control signal; the knocking control signal is used to control the knocking module to emit a knocking sound.

[0034] In a third aspect, the application provides a torque wrench, which adopts the following technical scheme:

[0035] The torque wrench comprises a ratchet head and the torque value prompting device as described above. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a block diagram of the torque value prompting device of one of the embodiments of the application.

[0037] Figure 2 is a structural diagram of the torque value prompting device of one of the embodiments of the application.

[0038] Figure 3 is a structural diagram of the torque wrench of one of the embodiments of the application to generate a knocking sound.

[0039] Figure 4 is Figure 3 is an enlarged view of part A in

[0040] REFERENCE SIGNS: 1, torque obtaining module; 11, strain gauge; 2, control module; 3, knocking module; 31, rod body; 32, iron core; 321, knocking head; 322, isolation sheet; 33, metal coil; 34, winding roller; 35, accommodating hole; 36, reset spring; 37, baffle; 4, storage module; 5, communication module; 6, alarm module; 7, ratchet head. DETAILED DESCRIPTION

[0041] In order to make the objectives, technical schemes and advantages of the application clearer, the following further describes the application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application and not used to limit the application. Figures 1-4

[0042] The embodiments of the application disclose a torque value prompting device of a torque wrench. With reference to Figure 1 , 2 The torque value prompting device of the torque wrench comprises:

[0043] ​The torque acquisition module 1 is configured to convert the torque value of the torque wrench into a torque signal.

[0044] The torque value is used to measure the size of the torque of the torque wrench, and the international unit is N*m. The torque signal is a voltage signal, that is, the torque acquisition module 1 converts the torque value of the physical quantity into a torque signal in the form of a voltage signal.

[0045] It should be understood that each torque value of the torque wrench corresponds to a unique torque signal.

[0046] The control module 2 is configured to output a knocking control signal in response to the value of the torque signal reaching a preset torque signal value. The torque input end is connected to the torque output end of the torque acquisition module 1.

[0047] It should be understood that since the torque signal is a voltage signal, the preset torque signal value needs to be set as a voltage value, and the size of the preset torque signal value is set according to the required torque value. For example, if the torque value is 20 N*m and the corresponding torque signal is 1 V, then if the required torque value is 20 N*m, the preset torque signal value can be set to 1 V. That is, when the torque signal does not reach 1 V, it means that the torque value of the current torque wrench does not reach 20 N*m. When the torque signal reaches 1 V, it means that the torque value of the current torque wrench reaches 20 N*m.

[0048] The knocking module 3 is configured to emit a knocking sound in response to the knocking control signal. The control signal receiving end is connected to the control signal output end of the control module 2.

[0049] In the above embodiment, the torque acquisition module 1 is used to obtain the torque signal of the torque wrench. When the torque signal reaches the preset torque signal value, the knocking control signal for controlling the knocking module 3 to emit the knocking sound is output, and the control module 2 is used to output the knocking control signal with better accuracy. Under the premise of ensuring accuracy, the operator can hear the knocking sound when the torque signal reaches the preset torque signal value, so as to prompt the operator to stop applying force.

[0050] Referring to Figure 1 As a further embodiment of the torque value prompting device, the torque value prompting device further comprises a communication module 5 and a storage module 4.

[0051] The storage module 4 is configured to record the basic data of the torque wrench according to the preset operator-post mapping table, the post-wrench serial number mapping table, and the torque signal. The basic data of the torque wrench includes the wrench serial number, the operator, the date, the torque value corresponding to the torque signal, and the torque value unit.

[0052] The operator-post mapping table includes the binding relationship between the operator and the post, and the post-wrench serial number mapping table includes the binding relationship between the post and the wrench serial number, so that the wrench serial number of the torque wrench can generate the operator of each torque wrench based on the preset operator-post mapping table and the post-wrench serial number mapping table.

[0053] It should also be understood that the torque value corresponding to the torque signal in the basic data has multiple groups, that is, the torque value corresponding to the torque signal is retained each time the torque wrench is operated. Since the torque value changes in real time when the torque wrench is rotating, retaining the real-time torque value can easily lead to excessive useless data, so only the final value of the torque value of each operation of the torque wrench is retained. Specifically, the maximum torque value is obtained, and it is determined whether the maximum torque value is adjusted within a preset time period in which the maximum torque value occurs. If so, the adjusted maximum torque value is taken as the final value, and if not, the maximum torque value is taken as the final value.

[0054] Further, the maximum torque value is usually adjusted in a fine-tuning manner, that is, the operator rotates the torque value of the torque wrench to the maximum torque value, and then increases or decreases the maximum torque value in a small range to adjust the maximum torque value to the required torque value. At this time, whether it is fine-tuning can be determined by limiting the torque value change range, that is, when the maximum torque value changes within a preset torque range, it is determined that the maximum torque value is adjusted.

[0055] The communication module 5 is used to determine whether the communication is normally connected. If so, the basic data is transmitted; if not, the basic data is stored in the storage module 4.

[0056] Specifically, the communication module 5 can be a Bluetooth sending module or a WIFI sending module. Correspondingly, the receiving end of the basic data needs to be provided with a Bluetooth receiving module or a WIFI receiving module. The receiving terminal of the basic data can be a terminal device such as a mobile phone, a computer or a server.

[0057] Taking the WIFI module as an example, the torque wrench connects the WIFI signal through the communication module 5, and the receiving terminal connects the same WIFI signal. At this time, if the communication module 5 and the receiving terminal are correctly connected to the same WIFI signal, and the WIFI signal can normally transmit data, it is considered that the communication is normally connected. At this time, the basic data can be transmitted.

[0058] In the above embodiment, the basic data of the torque wrench is recorded by the storage module 4, and the basic data is transmitted under the condition that the communication is normally connected by the communication module 5. By recording the wrench serial number, the operator, the date, the torque value corresponding to the torque signal and the torque value unit, the use of the wrench can be retained and transmitted.

[0059] With reference to Figure 1 As a further implementation of the torque value prompting device, the torque value prompting device further comprises an alarm module 6; the alarm module 6 is used for judging whether the torque signal is within the error range of the preset torque signal value, and if not, an alarm signal is generated.

[0060] The error range can be preset according to actual needs, for example, the error range can be preset as 5% or 10%, etc.

[0061] In the above implementation, when the torque signal is not within the error range of the preset torque signal, it indicates that there is a large error between the torque wrench applied to the actual torque value and the required torque value, and at this time, an alarm signal is output to prompt the operator to apply a suitable torque value.

[0062] With reference to Figure 3 , 4 As an implementation of the knocking module 3, the knocking module 3 comprises a rod body 31, an iron core 32, a metal coil 33 and a winding roller 34, and the rod body 31, the iron core 32, the metal coil 33 and the winding roller 34 are all arranged in the internal hollow of the rod body 31; the material of the rod body 31 is iron, the winding roller 34 is connected in the rod body 31 by bolts, the winding roller 34 comprises a column body and an end baffle 37, the cross-sectional shape of the column body and the end baffle 37 is consistent, and the cross-sectional area of the end baffle 37 is greater than that of the column body, the metal coil 33 is spirally wound outside the column body of the winding roller 34, the metal coil 33 is connected to the control signal output end of the control module 2, and the material of the metal coil 33 can be copper or aluminum; the column body and the end baffle 37 of the winding roller 34 are both provided with an accommodating hole 35 along the axial direction, and the iron core 32 is coaxially and slidingly arranged at the accommodating hole 35 of the winding roller 34, that is, there is a gap between the iron core 32 and the winding roller 34 for the sliding of the iron core 32, and the magnetic field generated after the metal coil 33 is electrified can drive the iron core 32 to move towards the rod wall of the rod body 31 and knock.

[0063] With reference to Figure 4 As a further implementation of the knocking module 3, the knocking module 3 further comprises a reset spring 36 and a baffle 37, the baffle 37 is fixedly arranged at one end of the iron core 32, one end of the reset spring 36 is fixedly arranged at one end of the winding roller 34 close to the baffle 37, and the other end of the reset spring 36 is fixedly arranged on the baffle 37; the material of the baffle 37 is plastic, and the elastic potential energy of the reset spring 36 is less than the magnetic field energy generated after the metal coil 33 is electrified.

[0064] It should be understood that when the elastic potential energy of the reset spring 36 is less than the magnetic field energy generated after the metal coil 33 is electrified, the attraction between the iron core 32 and the rod body 31 after the metal coil 33 is electrified should be much greater than the elastic force of the reset spring 36 and the resistance in the moving process, so that the iron core 32 can quickly move upward to impact the rod body 31.

[0065] Further, one end surface of the iron core 32 is fixedly provided with an iron percussion head 321, and the other end surface is provided with a separation sheet 322. The separation sheet 322 can be made of soft rubber or foam sponge, which cannot be attracted by a magnetic field. When the metal coil 33 is electrified, the generated magnetic field can make the iron core 32 and the percussion head 321 both have magnetism, so that the percussion head 321 is attracted to the direction close to the rod body 31, and the separation sheet 322 at the other end of the iron core 32 makes the iron core 32 not easy to move to the side close to the separation sheet 322, thereby reducing the attraction between the end of the iron core 32 close to the separation sheet 322 and the rod body 31.

[0066] In the above embodiment, the metal coil 33 is spirally wound on the winding roller 34, so that when the metal coil 33 is electrified, a magnetic field is generated near the metal coil 33, thereby making the iron core 32 located at the axis of the winding roller 34 have magnetism. The magnetic field can drive the iron core 32 to be attracted to the rod wall of the rod body 31. The iron core 32 hits the rod wall of the rod body 31 to generate a knocking sound and make the rod body 31 slightly vibrate. At this time, the return spring 36 is in a compressed state. When the magnetic field disappears, the iron core 32 does not have magnetism and is no longer attracted to the rod wall of the rod body 31. At this time, the return spring 36 drives the iron core 32 to move away from the rod wall of the rod body 31, so as to realize the effect of prompting the operator to stop applying force by knocking the rod body 31 with the iron core 32, and the iron core 32 is quickly reset after the knocking.

[0067] As an embodiment of the torque acquisition module 1, the torque acquisition module 1 comprises a strain gauge 11, which is in contact with the ratchet head 7 of the torque wrench and is located between the ratchet head 7 and the rod body 31, and is used to convert the mechanical deformation generated by the torque of the ratchet head 7 into a torque signal for output.

[0068] In the above embodiment, the strain gauge 11 has the advantages of small volume and high accuracy. The strain gauge 11 is used to collect the torque signal. On the one hand, the volume of the torque wrench is limited, and it is convenient to install the strain gauge 11 into the torque wrench. On the other hand, the strain gauge 11 can meet the demand of high accuracy of the torque wrench.

[0069] As an embodiment of the control module 2, the control module 2 comprises an amplifier, an AC / DC conversion circuit, a controller and a switching device.

[0070] The amplifier has an input end connected to the torque input end of the control module 2 and an output end connected to the input end of the AC / DC conversion circuit.

[0071] The controller is used to control the opening and closing of the switching device, has an input end connected to the output end of the AC / DC conversion circuit and an output end connected to the switching device.

[0072] A switch device is connected to the control signal output end of the control module 2, and is used to turn on or turn off the knocking template.

[0073] The AC-DC conversion circuit can be implemented by a diode, and the switch device can be implemented by an NMOS or NPN transistor. As an example, when the switch device is an NMOS tube, when the controller outputs a high level, the NMOS tube is turned on, so that the metal coil 33 is powered on, and when the controller outputs a low level, the NMOS tube is turned off, and there is no current passing through the metal coil 33, so no magnetic field is generated.

[0074] In the above embodiment, the torque signal is amplified by the amplifier, and the amplified torque signal is transmitted to the AC-DC conversion circuit to convert the torque signal into direct current. After the controller receives the direct current torque signal, the switch device is controlled to be turned on or turned off, and then the switch device turns on or turns off the knocking module 3, so as to realize the knocking effect of the knocking module 3.

[0075] The application discloses a torque value prompting method of a torque wrench.

[0076] The torque value prompting method of the torque wrench is applied to the torque value prompting device, and comprises the following steps.

[0077] The torque signal of the torque wrench is acquired.

[0078] In response to the value of the torque signal reaching a preset torque signal value, a knocking control signal is output, and the knocking control signal is used to control the knocking module 3 to emit a knocking sound.

[0079] The torque value prompting method of the torque wrench provided by the application can realize the torque value prompting device of the torque wrench, and the specific working process of the torque value prompting method of the torque wrench can refer to the corresponding process in the method embodiment.

[0080] The application discloses a torque wrench, which comprises a ratchet head 7 and the torque value prompting device.

[0081] Specifically, the ratchet head 7, i.e., the ratchet square tenon, is a clamping force applying component of the torque wrench. One end of the ratchet head 7 extends into the hollow part of the rod body 31 in the torque value prompting device, and the ratchet head 7 is installed on the rod body 31 through a fixing bolt.

[0082] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0083] The above are only preferred embodiments of the present application, not intended to limit the protection scope of the present application, any feature disclosed in the specification (including the abstract and the drawings) can be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, each feature is only an example of a series of equivalent or similar features, unless specifically stated otherwise.

Claims

1. A torque value indication device for a torque wrench, characterized in that, include: The torque acquisition module (1) is used to convert the torque value of the torque wrench into a torque signal; The control module (2) outputs a striking control signal in response to the torque signal value reaching the preset torque signal value. The torque input terminal is connected to the torque output terminal of the torque acquisition module (1). The striking module (3) responds to the striking control signal to emit a striking sound, and the control signal receiving end is connected to the control signal output end of the control module (2); It also includes a communication module (5) and a storage module (4); The storage module (4) is used to record the basic data of the torque wrench according to the preset operator-position mapping table, position-wrench serial number mapping table and torque signal; The communication module (5) is used to determine whether the communication is connected normally, and if so, to transmit basic data. The basic data of the torque wrench includes the wrench serial number, operator, date, torque value corresponding to the torque signal, and torque value unit; It also includes an alarm module (6); the alarm module (6) is used to determine whether the torque signal is within the error range of the preset torque signal value, and if not, an alarm signal is generated; The control module (2) includes an amplifier, an AC / DC conversion circuit, a controller, and switching devices; The amplifier has its input terminal connected to the torque input terminal of the control module (2) and its output terminal connected to the input terminal of the AC / DC conversion circuit. The controller is used to control the opening and closing of the switching device. Its input terminal is connected to the output terminal of the AC-DC conversion circuit, and its output terminal is connected to the switching device. The switching device is connected to the control signal output terminal of the control module (2) and is used to turn the knocking module (3) on or off.

2. The torque value indication device for a torque wrench according to claim 1, characterized in that: The striking module (3) includes a rod (31), an iron core (32), a metal coil (33), and a winding roller (34). The metal coil (33) is spirally wound on the winding roller (34) and is connected to the control module (2). The winding roller (34) has a receiving hole (35) through it along the axial direction. The iron core (32) is slidably disposed at the receiving hole (35) of the winding roller (34). The magnetic field generated by the metal coil (33) after being energized can be used to drive the iron core (32) to move closer to the rod wall of the rod (31) and strike it.

3. The torque value indication device for a torque wrench according to claim 2, characterized in that: The striking module (3) also includes a reset spring (36) and a baffle (37). The baffle (37) is disposed at one end of the iron core (32), one end of the reset spring (36) is disposed at the end of the winding roller (34) near the baffle (37), and the other end of the reset spring (36) is disposed on the baffle (37). The elastic potential energy of the reset spring (36) is less than the magnetic field energy generated after the metal coil (33) is energized.

4. The torque value indication device for a torque wrench according to claim 1, characterized in that: The torque acquisition module (1) includes a strain gauge (11), which is in contact with the ratchet head (7) of the torque wrench and is used to convert the mechanical deformation generated by the torque of the ratchet head (7) into a torque signal for output.

5. A torque wrench, characterized in that: It includes a ratchet head (7) and a torque value indication device as described in any one of claims 1-4.

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