Spanner and torque measurement method thereof

Abstract

The application discloses a wrench and a torque measurement method thereof. The wrench comprises a wrench handle, a plurality of wrench heads, a torque sensor, an input module, a processor, a display and a storage. The plurality of wrench heads comprise a first wrench head and a second wrench head. The first wrench head is fixedly connected to the wrench handle. The second wrench head is installed at an end of the first wrench head away from the wrench handle. The torque sensor is used for measuring the torque applied by the wrench to a workpiece to be fastened, and obtaining a torque measurement value T1. The input module is used for receiving input information about the second wrench head. The processor is used for performing data processing on the input information and the torque measurement value T1, so as to adjust the torque measurement value T1 to a torque correction value T2. The display is used for displaying the torque correction value T2. The storage is used for storing information of the wrench head and the wrench handle. The technical scheme of the application can realize direct reading of the actual torque value of the locked workpiece by the user without additional calculation.

Description

Technical Field

[0001] This invention relates to the field of torque tool technology, and in particular to a wrench and a method for measuring its torque. Background Technology

[0002] Torque wrenches are commonly used in the automotive and industrial sectors. For example, they are used to tighten nuts and bolts to a desired torque level or range. They secure components to be tightened according to a preset torque, preventing them from being overtightened or undertightened. Overtightening can cause components to come loose unexpectedly. Overtightening can make components difficult to remove, or may damage components or cause bolts to break due to plastic deformation.

[0003] In practical applications, torque wrenches are prone to inaccurate torque measurement. This is especially true in aerospace, automotive, and shipbuilding manufacturing and repair industries where pipelines are installed. Often, special clamps, such as hose clamps, are added to the torque wrench head, causing a change in the wrench's lever arm. This results in the torque value displayed on the digital torque wrench not being the actual torque value of the fastened part, making it impossible to accurately determine whether the workpiece is properly tightened. Currently, to obtain the actual torque value, users can calculate it manually and convert the displayed reading into the applied torque value. However, this calculation can be time-consuming and prone to errors. If the calculation is incorrect, the final torque applied to the workpiece will be incorrect, potentially damaging the workpiece and related components, ultimately creating a safety hazard. Summary of the Invention

[0004] The main objective of this invention is to provide a wrench and its torque measurement method, which aims to enable users to directly read the actual torque value of the locked fastener without additional calculation.

[0005] To achieve the above objectives, the present invention provides a wrench, comprising:

[0006] lever handle;

[0007] Multiple wrench heads, including a first wrench head and a second wrench head, wherein the first wrench head is fixedly connected to the wrench handle, and the second wrench head is installed at the end of the first wrench head away from the wrench handle;

[0008] A torque sensor is used to measure the amount of torque applied by the wrench to the workpiece to be tightened, and to obtain the torque measurement value T1;

[0009] An input module is used to receive input information about the second wrench head;

[0010] The processor is configured to process the input information and the torque measurement value T1 to adjust the torque measurement value T1 to a torque correction value T2.

[0011] A display for showing the torque correction value T2; and

[0012] A storage device for storing information about the wrench head and the wrench handle.

[0013] Optionally, the wrench has a standard lever arm L1, which is the working length of the wrench handle and the first wrench head. The second wrench head has a first torque arm L1. The processor obtains the torque arm L2 according to the input information and obtains the torque correction value T2 according to the formula T2=T1*(L1+L2) / L1.

[0014] The present invention also provides a wrench, comprising:

[0015] lever handle;

[0016] Multiple wrench heads, each of which can be detachably connected to the wrench handle;

[0017] A torque sensor is used to measure the amount of torque applied by the wrench to the workpiece to be tightened, and to obtain the torque measurement value T1;

[0018] An input module is used to receive input information from the wrench head connected to the wrench handle;

[0019] The processor is configured to process the input information and the torque measurement value T1 to adjust the torque measurement value T1 to a torque correction value T2.

[0020] A display for showing the torque correction value T2; and

[0021] A storage device for storing information about the wrench head and the wrench handle.

[0022] Optionally, the wrench has a standard lever arm L1', which is the working length of the wrench handle, and the plurality of wrench heads include a first wrench head and a second wrench head. The first wrench head has a preset lever arm L2', and the second wrench head has a torque arm L3. The processor obtains the torque arm L3 according to the input information. When the second wrench head is connected to the wrench handle, the processor obtains the torque correction value T2 according to the formula T2=T1*(L1'+L3) / (L1'+L2').

[0023] Optionally, the second wrench head can also be detachably connected to the first wrench head;

[0024] When the first wrench head is detachably mounted on the handle, and the second wrench head is mounted on the end of the first wrench head away from the handle, the processor obtains the torque correction value T2 according to the formula T2=T1*(L1'+L2'+L3) / (L1'+L2').

[0025] The present invention also provides a method for measuring wrench torque, comprising:

[0026] The input module receives input information about the second wrench head;

[0027] The wrench applies torque to the workpiece to be tightened, the torque sensor measures the torque value T1, and transmits it to the processor;

[0028] The processor processes the data based on the input information and the torque measurement value T1 to obtain the torque correction value T2, and then transmits it to the display.

[0029] The display shows the torque correction value T2.

[0030] Optionally, the memory stores data information of the standard lever arm L1 and the second wrench head. The input module receives the installation information of the second wrench head installed at the end of the first wrench head away from the handle and the model information of the second wrench head, and transmits it to the processor. The processor retrieves the torque arm L2 of the second wrench head based on the model information of the second wrench head. Alternatively, the input module receives the data of the second wrench head installed at the end of the first wrench head away from the handle and the torque arm L2, and transmits it to the processor. The processor obtains the standard lever arm L1 from the memory and obtains the torque correction value T2 according to the formula T2 = T1*(L1+L2) / L1.

[0031] The present invention also provides a method for measuring wrench torque, comprising:

[0032] The input module receives input information from the wrench head connected to the wrench handle;

[0033] The wrench applies torque to the workpiece to be tightened, the torque sensor measures the torque value T1, and transmits it to the processor;

[0034] The processor processes the data based on the input information and the torque measurement value T1 to obtain the torque correction value T2, and then transmits it to the display.

[0035] The display shows the torque correction value T2.

[0036] Optionally, the memory stores the standard lever arm L1', the preset lever arm L2' of the first wrench head, and the data information of the second wrench head. Before the processor processes the torque measurement value T1, the input module receives the installation information of the wrench head and the model information of the second wrench head, and transmits them to the processor. The processor retrieves the torque arm L3 of the second wrench head based on the model information of the second wrench head; or, the input module receives the installation information of the second wrench head installed on the wrench handle and the torque arm L3, and transmits them to the processor.

[0037] Optionally, the processor obtains the installation information of the second wrench head mounted on the wrench handle, the standard lever arm L1', the preset lever arm L2', and the torque arm L3, and obtains the torque correction value T2 according to the formula T2=T1*(L1'+L3) / (L1'+L2'); or,

[0038] The processor obtains the installation information of the second wrench head being installed at the end of the first wrench head away from the handle, the standard lever arm L1', the preset lever arm L2', and the torque arm L3, and obtains the torque correction value T2 according to the formula T2=T1*(L1'+L2'+L3) / (L1'+L2').

[0039] In this embodiment of the invention, an input module is added to receive input information from the second wrench head. This input information includes whether the second wrench head is installed, its model information, or its torque arm L2. After receiving the input information, the input module transmits the data to the processor. The processor then processes the torque measurement value T1 based on the input information, adjusting it to a torque correction value T2. The display shows the torque correction value T2, thus obtaining an accurate value. This avoids relying on manual calculation of the actual torque value, making it convenient, fast, and accurate. It ensures that the operator can directly read the torque correction value T2, i.e., the actual torque value, from the display, facilitating the use of the wrench. The wrench also includes a memory for storing the standard torque arm L1 and the model information of multiple second wrench heads, as well as the corresponding torque arms L2, allowing the processor to retrieve the torque arm L2 based on the input information. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the structure of the first embodiment of the wrench of the present invention;

[0042] Figure 2 for Figure 1 A schematic diagram of a middle wrench with a second wrench head attached;

[0043] Figure 3 This is a structural schematic diagram of the second embodiment of the wrench of the present invention;

[0044] Figure 4 for Figure 3 A schematic diagram of the structure in which the second wrench head is installed on the wrench handle;

[0045] Figure 5 for Figure 3 A schematic diagram showing that both the second and first wrench heads are mounted on the wrench handle.

[0046] Explanation of icon numbers:

[0047] 100 wrench 117 Fifth point of action 110 lever handle 120 wrench head 111 Holding section 121 First wrench 112 Point of application of force 122 Second wrench 113 First point of action 130 Input module 114 Second point of action 131 Input panel 115 Third point of action 132 Button 116 Fourth point of action 140 monitor

[0048] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0050] It should be noted that if the embodiments of the present invention involve directional indicators such as up, down, left, right, front, back, etc., the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicators will also change accordingly.

[0051] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0052] This invention proposes a wrench 120.

[0053] In this invention, the wrench 120 includes a handle 110 and a first wrench head 121 to meet the basic functional requirements of the wrench 120. (Refer to...) Figure 1 and Figure 2 The first wrench head 121 can be non-detachably connected to the wrench handle 110, that is, the wrench handle 110 and the first wrench head 121 are integrally formed; see reference. Figures 3 to 5 The first wrench head 121 can also be detachably connected to the wrench handle 110, such as by a tenon joint. In other embodiments, the wrench handle 110 and the first wrench head 121 can also be connected by other structural insertion, snap-fit, or screw fastening methods. Therefore, the working length of the wrench handle 110 and the first wrench head 121 is generally assumed to be the standard lever arm L1 of the wrench 120. When tightening the workpiece, the wrench 120 can apply a torque to the workpiece. Combining this torque with the standard lever arm L1, a torque measurement value T1 is obtained. The display 140 can display this torque measurement value T1, and the torque measurement value can change with the torque, thereby facilitating the operator to monitor whether the tightening is completed in a timely manner.

[0054] However, to adapt to some special installation environments or fastening methods, different wrench heads are required. Therefore, the wrench 120 also includes multiple second wrench heads 122. "Multiple" here refers not only to different types of second wrench heads 122, but also to different sizes. Consequently, at least two of the multiple second wrench heads 122 have different torque arms L2. Adding or replacing a second wrench head 122 will inevitably change the standard torque arm, causing the torque measurement value T1 displayed on the monitor 140 to be different from the actual torque arm of the wrench 120, resulting in inaccurate measurements. Therefore, the actual torque value of the wrench 120 needs to be calculated manually. Relying solely on manual calculation is not only time-consuming, but also prone to errors. If the calculation is incorrect, the final torque applied to the workpiece to be fastened will be incorrect, potentially causing damage to the workpiece and related components.

[0055] like Figure 1 and Figure 2 As shown, Figure 1 This is a schematic diagram showing the structure of the wrench 120 in the first embodiment without the second wrench head 122 attached. Figure 1 This is a schematic diagram showing the structure of the wrench 120 in the first embodiment with a second wrench head 122 added. In the first embodiment, the wrench 120 includes:

[0056] Wrench handle 110;

[0057] Multiple wrench heads, including a first wrench head 121 and a second wrench head 122, wherein the first wrench head 121 is fixedly connected to the wrench handle 110, and the second wrench head 122 is installed at the end of the first wrench head 121 away from the wrench handle 110;

[0058] A torque sensor is used to measure the amount of torque applied by the wrench 120 to the workpiece to be tightened, and to obtain the torque measurement value T1.

[0059] Input module 130 is used to receive input information about the second wrench head 122;

[0060] The processor is used to process the input information and the torque measurement value T1 to adjust the torque measurement value T1 to the torque correction value T2;

[0061] Display 140 is used to display the torque correction value T2; and

[0062] A storage device for storing information about the wrench head and handle 110.

[0063] Furthermore, the wrench 120 has a standard lever arm L1, which is the working length of the handle 110 and the first wrench head 121. The second wrench head 122 has a torque arm L2. The processor obtains the torque arm L2 according to the input information and obtains the torque correction value T2 according to the formula T2=T1*(L1+L2) / L1.

[0064] Specifically, in the first embodiment, the wrench 120 has a handle 110 and multiple wrench heads. The multiple wrench heads of the wrench 120 include a first wrench head 121 and a second wrench head 122. The first wrench head 121 is fixedly connected to the handle 110, and the second wrench head 122 is installed at the end of the first wrench head 121 away from the handle 110. That is, the first wrench head 121 of the wrench 120 is non-detachably installed with the handle 110, and the second wrench head 122 can be attached to the end of the first wrench head 121 away from the handle 110. At this time, the wrench 120 has a standard lever arm L1 (the standard lever arm L1 is the working length of the handle 110 and the first wrench head 121). The torque sensor of the wrench 120 measures the amount of torque applied by the wrench 120 to the workpiece to be tightened and transmits it to the processor. The processor processes the torque to obtain the torque measurement value T1 and displays it on the display 140. Without the second wrench head 122, the torque measurement value T1 of the wrench 120 equals the torque correction value T2, requiring no calibration. However, in actual use, adding the second wrench head 122 alters the actual torque arm of the wrench 120. In this case, the actual torque arm of the wrench 120 is the sum of the standard torque arm and the torque arm L2 of the second wrench head 122, which is greater than the original torque arm of the wrench 120. This causes the torque measurement value T1 to be less than the torque correction value T2, resulting in the reading displayed on the monitor 140 being less than the actual torque applied by the wrench 120, leading to inaccurate measurements. Therefore, the actual torque value of the wrench 120 needs to be manually calculated. Relying solely on manual calculation is time-consuming and prone to errors. If the calculation is incorrect, the final torque applied to the workpiece to be tightened will be incorrect, potentially damaging the workpiece and related components.

[0065] Therefore, an input module 130 is added in the first embodiment. The input module 130 can receive input information from the second wrench head 122. The input information includes whether the second wrench head 122 is installed, the model information of the second wrench head 122, or the torque arm L2 of the second wrench head 122. After receiving the input information, the input module 130 transmits the data to the processor, so that the processor can process the torque measurement value T1 according to the input information to adjust the torque measurement value T1 to the torque correction value T2. The display 140 displays the torque correction value T2, thereby obtaining an accurate value, and the display 140 displays the torque correction value T2. This avoids relying on manual calculation of the actual torque value, is convenient and fast, and has a high accuracy rate. It also ensures that the operator can directly read the torque correction value T2, that is, the actual torque value, on the display 140, which facilitates the use of the wrench 120. The wrench 120 also includes a memory for storing model information of the standard lever arm L1 and multiple second wrench heads 122, as well as the corresponding torque arm L2, so that the processor can retrieve the torque arm L2 based on the input information.

[0066] It is understood that, and to facilitate the installation of the second wrench head 122, the first wrench head 121 is typically a ratchet head, integrally formed with the handle 110. The corresponding standard lever arm L1 is the working length of the ratchet head and the handle 110, which is the total length from the operator's force application point 112 to the first point of action 113 of the first wrench head 121. The handle 110 has a grip section 111 for the operator to hold. The operator turns the wrench 120 through the grip section 111. Therefore, the force application point 112 of the wrench 120 is generally located on the grip section 111. In order to save as much effort as possible, the grip section 111 is usually located at the end away from the first wrench head 121. The grip section 111 is usually roughened and softened, such as by wearing a rubber sleeve on the grip section 111 and roughening the surface of the rubber sleeve. In this design, the position of the gripping section 111 is constant, and the corresponding force application point 112 also remains unchanged. The first wrench head 121 has a first mounting position, which is used for mounting the second wrench head 122 and for applying force to the workpiece to be tightened. The first mounting position has a corresponding first application point 113, and the distance between the first application point 113 and the force application point 112 is the standard lever arm L1. The torque arm L2 of the second wrench head 122 also refers to the working length of the second wrench head 122. The first wrench head 121 has a second mounting position for applying force to the workpiece to be tightened, and the second mounting position has a corresponding second application point 114. When the second wrench head 122 is mounted on the first wrench head 121, the distance between the first application point 113 and the second application point 114 is the working length of the second wrench head 122, which is also the torque arm L2 of the second wrench head 122.

[0067] Correspondingly, the torque measurement method of the wrench 120 in the first embodiment includes:

[0068] Input module 130 receives input information about the second wrench head 122;

[0069] The wrench 120 applies torque to the workpiece to be tightened, the torque sensor measures the torque value T1, and transmits it to the processor;

[0070] The processor processes the data based on the input information and the torque measurement value T1 to obtain the torque correction value T2, and then transmits it to the display 140.

[0071] Display 140 shows the torque correction value T2.

[0072] Optionally, the memory stores data information of the standard lever arm L1 and the second wrench head 122. The input module 130 receives the installation information of the second wrench head 122 installed at the end of the first wrench head 121 away from the handle 110 and the model information of the second wrench head 122, and transmits it to the processor. The processor retrieves the torque arm L2 of the second wrench head 122 based on the model information of the second wrench head 122. Alternatively, the input module 130 receives the second wrench head 122 installed at the end of the first wrench head 121 away from the handle 110 and the torque arm L2, and transmits it to the processor. The processor obtains the standard lever arm L1 from the memory and obtains the torque correction value T2 according to the formula T2=T1*(L1+L2) / L1.

[0073] Specifically, the operator can first input the model number of the second wrench head 122 to be replaced into the input module 130. If the model number of the second wrench head 122 is not included, the operator can directly input the torque arm L2 of the second wrench head 122 through measurement or relevant markings, and then replace the second wrench head 122. Alternatively, the operator can replace the second wrench head 122 first, and then input the model number or torque arm L2 of the second wrench head 122 to be replaced into the input module 130. The input module 130 receives the installation information of the second wrench head 122 installed at the end of the first wrench head 121 away from the handle 110 and the information of the second wrench head 122. Then, the operator uses the wrench 120 to tighten the workpiece to be fastened. The wrench 120 applies torque to the workpiece to be fastened, and the torque sensor measures the torque measurement value T1 and transmits it to the processor. At this time, the display 140 does not display the torque measurement value T1. The processor obtains the torque arm L2 and standard arm L1 based on the input information and the information in the storage, and selects an appropriate formula T2 = T1*(L1+L2) / L1 to process the torque measurement value T1, obtaining the torque correction value T2. This value is then transmitted to the display 140, where it is displayed. Therefore, the operator can only observe the torque correction value T2 on the display 140. Furthermore, the magnitude of the torque correction value T2 can change according to the different pressures applied by the operator to the force application point 112, facilitating timely reading of the actual torque value. The display 140 can also provide prompts to the operator, guiding them to perform the correct operating steps for the wrench 120. It can provide timely warnings if the operator accidentally touches or misses a step, thus ensuring the accuracy of the torque correction value T2 and reducing the possibility of the operator forgetting to input the installation information and data of the second wrench head 122 into the input module 130.

[0074] The torque arm L2 of the second wrench head 122 is stored in the memory, which the processor can retrieve at any time. This allows the processor to quickly calculate the torque corresponding to the torque measurement value T1, thus speeding up the operation of the processor's internal system algorithm. If the operator inputs the model information of the second wrench head 122 into the input module 130, the input module 130 transmits it to the processor. The processor retrieves the torque arm L2 and the standard lever arm L1 of the second wrench head 122 from the memory based on the model information. If the operator inputs the torque arm L2 into the input module 130, there is no need to retrieve it from the memory again.

[0075] In this embodiment of the invention, an input module 130 is added. The input module 130 can receive input information from the second wrench head 122. This input information includes whether the second wrench head 122 is installed, the model information of the second wrench head 122, or the torque arm L2 of the second wrench head 122. After receiving the input information, the input module 130 transmits the data to the processor. The processor then processes the torque measurement value T1 according to the input information to adjust the torque measurement value T1 to a torque correction value T2. The display 140 displays the torque correction value T2, thus obtaining an accurate value. This avoids relying on manual calculation of the actual torque value, making it convenient, fast, and accurate. Furthermore, it ensures that the operator can directly read the torque correction value T2, i.e., the actual torque value, on the display 140, facilitating the use of the wrench 120. The wrench 120 also includes a memory for storing model information of the standard lever arm L1 and multiple second wrench heads 122, as well as the corresponding torque arm L2, so that the processor can retrieve the torque arm L2 based on the input information.

[0076] like Figures 3 to 5 As shown, Figure 3 This is a schematic diagram showing the structure of the wrench 120 in the second embodiment without the second wrench head 122 installed. Figure 4 and Figure 5 All figures represent structural schematic diagrams of the wrench 120 with the second wrench head 122 installed in the second embodiment. In the second embodiment, the wrench 120 includes:

[0077] Wrench handle 110;

[0078] Multiple wrench heads, all of which can be detachably connected to the wrench handle 110;

[0079] A torque sensor is used to measure the amount of torque applied by the wrench 120 to the workpiece to be tightened, and to obtain the torque measurement value T1.

[0080] The input module 130 is used to receive input information from the wrench head connected to the handle 110;

[0081] The processor is used to process the input information and the torque measurement value T1 to adjust the torque measurement value T1 to the torque correction value T2;

[0082] Display 140 is used to display the torque correction value T2; and

[0083] A storage device for storing information about the wrench head and handle 110.

[0084] Optionally, the wrench 120 has a standard lever arm L1', which is the working length of the handle 110, and multiple wrench heads including a first wrench head 121 and a second wrench head 122. The first wrench head 121 has a preset lever arm L2', and the second wrench head 122 has a torque arm L3. The processor obtains the torque arm L3 according to the input information. When the second wrench head 122 is connected to the handle 110, the processor obtains the torque correction value T2 according to the formula T2=T1*(L1'+L3) / (L1'+L2').

[0085] Optionally, the second wrench head 122 can also be detachably connected to the first wrench head 121;

[0086] When the first wrench head 121 is detachably installed on the handle 110, and the second wrench head 122 is installed on the end of the first wrench head 121 away from the handle 110, the processor obtains the torque correction value T2 according to the formula T2=T1*(L1'+L2'+L3) / (L1'+L2').

[0087] Specifically, in the second embodiment, the wrench 120 has a handle 110 and a plurality of wrench heads, all of which can be detachably connected to the handle 110. The plurality of wrench heads of the wrench 120 include a first wrench head 121 and a second wrench head 122. Therefore, the first wrench head 121 can be directly and detachably installed on the handle 110, or the second wrench head 122 can be detachably installed on the handle 110 instead of the first wrench head 121, or the first wrench head 121 can be detachably installed on the handle 110 and the second wrench head 122 can be installed at the end of the first wrench head 121 away from the handle 110, that is, the second wrench head 122 can be added to the end of the first wrench head 121 away from the handle 110. When the wrench 120 leaves the factory, it has a standard lever arm L1', which is the working length of the handle 110; the first wrench head 121 has a preset lever arm L2', which is the working length of the first wrench head 121. Therefore, when only the first wrench head 121 is directly and detachably installed on the handle 110, the torque measurement value T1 obtained by the processor is equal to the torque correction value T2, and no calibration is required; however, when the second wrench head 122 is detachably installed on the handle 110 instead of the first wrench head 121, if the torque arm L3 of the second wrench head 122 is different from the preset lever arm L2', it may affect the accuracy of the torque measurement value T1 obtained by the processor, causing the reading displayed on the display 140 to be different from the actual torque value applied by the wrench 120, resulting in inaccurate measurement. Alternatively, if the first wrench head 121 is detachably mounted on the handle 110, and the second wrench head 122 is mounted on the end of the first wrench head 121 furthest from the handle 110, the actual torque arm of the wrench 120 will also change. In this case, the actual torque arm of the wrench 120 is the sum of the standard torque arm and the torque arm L2 of the second wrench head 122, which is greater than the original torque arm of the wrench 120. Consequently, the measured torque value T1 is less than the torque correction value T2, resulting in the reading displayed on the monitor 140 being less than the actual torque value applied by the wrench 120, leading to inaccurate measurement. Therefore, it is necessary to manually calculate the actual torque value of the wrench 120. Relying solely on manual calculation is not only time-consuming but also prone to errors. If the calculation is incorrect, the final torque applied to the workpiece to be tightened will be incorrect, potentially causing damage to the workpiece and related components.

[0088] Therefore, in the second embodiment, an input module 130 is added to receive input information from the wrench head connected to the handle 110. This input information includes either a second wrench head 122 detachably mounted on the handle 110 instead of the first wrench head 121, or the first wrench head 121 detachably mounted on the handle 110, with the second wrench head 122 mounted at the end of the first wrench head 121 furthest from the handle 110. After receiving the input information, the input module 130 transmits the data to the processor, allowing the processor to process the torque measurement value T1 according to the input information, adjusting it to a torque correction value T2. The display 140 then displays the torque correction value T2, thus obtaining an accurate value. This avoids relying on manual calculation of the actual torque value, making it convenient, fast, and accurate. Furthermore, it ensures that the operator can directly read the torque correction value T2, i.e., the actual torque value, from the display 140, facilitating the use of the wrench 120. The wrench 120 also includes a memory for storing model information of the standard lever arm L1 and multiple second wrench heads 122, as well as the corresponding torque arm L2, so that the processor can retrieve the torque arm L2 based on the input information.

[0089] If the input information is that the second wrench head 122 is detachably installed on the handle 110 instead of the first wrench head 121, the processor can obtain the torque correction value T2 according to the formula T2=T1*(L1'+L3) / (L1'+L2'); if the input information is that the first wrench head 121 is detachably installed on the handle 110, and the second wrench head 122 is installed at the end of the first wrench head 121 away from the handle 110, the processor can obtain the torque correction value T2 according to the formula T2=T1*(L1'+L2'+L3) / (L1'+L2').

[0090] It is understood that the wrench handle 110 has a grip section 111 for the operator to hold. The operator pulls the wrench 120 through the grip section 111, so the force application point 112 of the wrench 120 is generally located on the grip section 111. In order to save as much effort as possible, the grip section 111 is usually located at the end away from the first wrench head 121. The grip section 111 is usually roughened and softened, such as by covering the grip section 111 with a rubber sleeve and roughening the surface of the rubber sleeve. In this design, the position of the grip section 111 is constant, and the corresponding force application point 112 also remains unchanged. The other end of the wrench handle 110 has three mounting positions. The third mounting position is used for mounting the first wrench head 121. The third mounting position has a third action point 115. The distance between the third action point 115 and the force application point 112 is the working length of the wrench handle 110, which is also the standard lever arm L1'. The first wrench head 121 has a fourth mounting position, which is used for both mounting the second wrench head 122 and applying force to the workpiece to be tightened. The fourth mounting position has a fourth application point 116. When the first wrench head 121 is mounted on the handle 110, the distance from the fourth application point 116 to the third application point 115 is the working length of the first wrench head 121, which is also the preset lever arm L2'. The second wrench head 122 has a fifth mounting position, which is used for applying force to the workpiece to be tightened. The fifth mounting position has a fifth application point 117. When the second wrench head 122 is mounted on the first wrench head 121, the distance from the fifth application point 117 to the fourth application point 116 is the working length of the second wrench head 122, which is also the torque arm L3 of the second wrench head 122.

[0091] Additionally, it should be noted that there is only one first wrench head 121 to ensure the accuracy of the preset lever arm L2'. It is generally configured as a ratchet head, which facilitates the installation of the second wrench head 122 and allows it to be applied to the workpiece to be tightened. The number of second wrench heads 122 can be multiple and varied, therefore the torque arm L3 of the second wrench head 122 may change and is a variable. Furthermore, in other embodiments, multiple second wrench heads 122 can be mounted on the handle 110, with the multiple second wrench heads 122 connected end-to-end and their initial ends mounted on the handle 110. In this case, the torque arm L3 is the sum of the torque arms L3 of the multiple second wrench heads 122.

[0092] Correspondingly, the torque measurement method of the wrench 120 in the second embodiment includes:

[0093] The input module 130 receives input information from the wrench head connected to the handle 110;

[0094] The wrench 120 applies torque to the workpiece to be tightened, the torque sensor measures the torque value T1, and transmits it to the processor;

[0095] The processor processes the data based on the input information and the torque measurement value T1 to obtain the torque correction value T2, and then transmits it to the display 140.

[0096] Display 140 shows the torque correction value T2.

[0097] Optionally, the memory stores data information of the standard lever arm L1', the preset lever arm L2' of the first wrench head 121, and the second wrench head 122. Before the processor processes the torque measurement value T1, the input module 130 receives the installation information of the wrench head and the model information of the second wrench head 122, and transmits them to the processor. The processor retrieves the torque arm L3 of the second wrench head 122 based on the model information of the second wrench head 122; or, the input module 130 receives the installation information of the second wrench head 122 installed on the wrench handle 110 and the torque arm L3, and transmits them to the processor.

[0098] Optionally, the processor obtains the installation information of the second wrench head 122 mounted on the wrench handle 110, the standard lever arm L1', the preset lever arm L2', and the torque arm L3, and obtains the torque correction value T2 according to the formula T2=T1*(L1'+L3) / (L1'+L2'); or,

[0099] The processor obtains the installation information of the second wrench head 122 installed on the end of the first wrench head 121 away from the handle 110, the standard lever arm L1', the preset lever arm L2' and the torque arm L3, and obtains the torque correction value T2 according to the formula T2=T1*(L1'+L2'+L3) / (L1'+L2').

[0100] When the second wrench head 122 is installed on the wrench handle 110, the input module 130 receives the installation information of the second wrench head 122 being installed on the wrench handle 110 and the information of the second wrench head 122. Then, the operator uses the wrench 120 to tighten the workpiece to be tightened. The wrench 120 applies torque to the workpiece to be tightened, and the torque sensor measures the torque measurement value T1 and transmits it to the processor. At this time, the display 140 does not display the torque measurement value T1. The processor obtains the torque arm L3, standard arm L1', and preset arm L2' based on the input information and the information in the storage. It then selects an appropriate formula, T2 = T1*(L1'+L3) / (L1'+L2'), to process the torque measurement value T1, obtaining the torque correction value T2. This value is then transmitted to the display 140, where it is displayed. Therefore, the operator can only observe the torque correction value T2 on the display 140. Furthermore, the magnitude of the torque correction value T2 changes according to the different pressures applied by the operator to the force application point 112, facilitating timely reading of the actual torque value. The display 140 can also provide prompts to the operator, guiding them to perform the correct operating steps for the wrench 120. It provides timely warnings if the operator accidentally touches or misses a step, ensuring the accuracy of the torque correction value T2 and reducing the possibility of the operator forgetting to input the installation information and data of the second wrench head 122 into the input module 130.

[0101] When the second wrench head 122 is installed at the end of the first wrench head 121 away from the handle 110, the input module 130 receives the installation information of the second wrench head 122 being installed at the end of the first wrench head 121 away from the handle 110 and the information of the second wrench head 122. Then, the operator uses the wrench 120 to tighten the workpiece to be tightened. The wrench 120 applies torque to the workpiece to be tightened, and the torque sensor measures the torque measurement value T1 and transmits it to the processor. At this time, the display 140 does not display the torque measurement value T1. The processor obtains the torque arm L3, standard arm L1', and preset arm L2' based on the input information and the information in the storage. It then selects an appropriate formula, T2 = T1*(L1'+L2'+L3) / (L1'+L2'), to process the torque measurement value T1, obtaining the torque correction value T2. This value is then transmitted to the display 140, allowing the operator to see T2 directly on the display. Furthermore, the magnitude of T2 changes with the pressure applied to the force application point 112, facilitating timely reading of the actual torque value. The display 140 also provides prompts to the operator, indicating the correct operating steps for the wrench 120. It provides timely warnings if the operator accidentally touches the wrong point or misses a step, ensuring the accuracy of the torque correction value T2 and reducing the possibility of the operator forgetting to input the installation information and data of the second wrench head 122 into the input module 130.

[0102] The torque arm L3 of the second wrench head 122 is stored in the memory, which the processor can retrieve at any time. This allows the processor to calculate the torque corresponding to the torque measurement value T1 in a timely manner, thus speeding up the operation of the processor's internal system algorithm. If the operator inputs the model information of the second wrench head 122 into the input module 130, the input module 130 transmits it to the processor. The processor retrieves the torque arm L3, standard arm L1', and preset arm L2' of the second wrench head 122 from the memory based on the model information. If the operator inputs the torque arm L2 into the input module 130, the processor only needs to retrieve the standard arm L1' and preset arm L2' from the memory.

[0103] The input module 130 includes a first button 132 and a second button 132. When the second wrench head 122 is installed on the wrench handle 110, the first button 132 is triggered; when the second wrench head 122 is installed at the end of the first wrench head 121 away from the wrench handle 110, the second button 132 is triggered, thereby facilitating the operator to quickly input the installation information of the second wrench head 122.

[0104] Furthermore, in this invention, the input module 130 allows the operator to transmit information, data, and / or commands input to the wrench 120. For example, the input module 130 may include a keyboard, mouse, touchscreen, recorder, audio transmitter, component board, or other device that allows user input. In one embodiment, the input module 130 is configured as an input panel 131, which has multiple buttons 132. These buttons 132 may include up / down control buttons 132, an "Enter" key, a "Unit" key, a numeric button 132, and other selection buttons. In one example, the buttons 132 allow the user to input the torque arm of the second wrench head 122 or the model information of the second wrench head 122. The input panel 131 can be directly mounted on the wrench 120 or located outside the wrench 120 and connected to it via a signal. The input module 130 can also be a remote terminal, connected to the wrench 120 remotely via Bluetooth or infrared, allowing the user to input relevant information to the wrench 120.

[0105] The memory can store not only data from the wrench head, but also the processor's operating system or other software or data that may be necessary for the operation of the wrench 120, for the processor to query and access. Without limitation, the memory may include permanent computer-readable recording media such as hard disks, DVDs, CDs, flash drives, non-permanent or permanent storage, RAM, or other types of data storage.

[0106] The display 140 can not only display the torque correction value T2, but also various other information for the operator to view and interpret. This may include text or graphics, or information from the input module 130. For example, the display 140 may include a liquid crystal display (LCD), an organic light-emitting diode (OLED) display, a plasma screen, or other types of monochrome or color displays that allow the operator to view and interpret information.

[0107] The processor facilitates communication between various components of the wrench 120 and controls the operation of the electronic components of the wrench 120. The processor can be a special-purpose or general-purpose processor or a multi-processor, such as a microprocessor, a single-core, or a multi-core processor. In one illustrative embodiment, the processor is used to adjust the torque measurement value T1 of the wrench 120 based on input information from the input module 130, so that the wrench 120 displays the actual torque value on the display 140, or provides other feedback to the operator when the desired torque amount is reached, for example, through known visual, auditory, or tactile means.

[0108] Furthermore, this embodiment of the invention also proposes a computer-readable storage medium storing a wrench 120 torque measurement program, which, when executed by a processor, implements the steps of the wrench 120 torque measurement method as described in the above embodiments.

[0109] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0110] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0111] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause the wrench 120 torque measuring device to execute the methods of the various embodiments of the present invention.

[0112] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural transformations made using the contents of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of the present invention.

Claims

1. A wrench, characterized in that, include: lever handle; Multiple wrench heads, including a first wrench head and a second wrench head, wherein the first wrench head is fixedly connected to the wrench handle, and the second wrench head is installed at the end of the first wrench head away from the wrench handle. The wrench handle has a gripping section and a force application point. The first wrench head has a ratchet head structure. The first wrench head has a first mounting position for the second wrench head to be adapted and installed, and a first action point located at the first mounting position. The distance between the first action point and the force application point is a standard lever arm L1. The second wrench head has a second action point, and the torque arm L2 of the second wrench head is the action length between the first action point and the second action point. A torque sensor is used to measure the amount of torque applied by the wrench to the workpiece to be tightened, and to obtain the torque measurement value T1; An input module is used to receive input information about the second wrench head; The processor is used to process the input information and the torque measurement value T1 to adjust the torque measurement value T1 to a torque correction value T2. The processor obtains the torque arm L2 according to the input information and obtains the torque correction value T2 according to the formula T2=T1*(L1+L2) / L1. The display is used to show the torque correction value T2. The display can also prompt the user to perform the correct operation steps for the wrench. When the operator accidentally touches or misses a step, the display can give a warning prompt. as well as Storage device for storing information about the wrench head and the wrench handle; The input module is a remote terminal, which is remotely connected to the wrench via Bluetooth or infrared. The remote terminal can input information to the wrench. The input information of the wrench head includes the model of the second wrench head and the torque arm L2 of the second wrench head. If the model of the second wrench head is not included, the input module receives the torque arm L2 of the second wrench head and stores it in the memory.

2. A wrench, characterized in that, include: lever handle; Multiple wrench heads, each of which can be detachably connected to the wrench handle; A torque sensor is used to measure the amount of torque applied by the wrench to the workpiece to be tightened, and to obtain the torque measurement value T1; An input module is used to receive input information from the wrench head connected to the wrench handle; The processor is configured to process the input information and the torque measurement value T1 to adjust the torque measurement value T1 to a torque correction value T2. A display for showing the torque correction value T2; as well as Storage device for storing information about the wrench head and the wrench handle; The wrench has a standard lever arm L1', which is the working length of the wrench handle. The plurality of wrench heads include a first wrench head and a second wrench head. The first wrench head has a preset lever arm L2', and the second wrench head has a torque arm L3. The processor obtains the torque arm L3 according to the input information. When the second wrench head is connected to the wrench handle, the processor obtains the torque correction value T2 according to the formula T2=T1*(L1'+L3) / (L1'+L2'). The display can also prompt the user to perform the correct operating steps for the wrench. When the operator accidentally touches or misses a step, the display can give a warning prompt. The input module is a remote terminal, which is remotely connected to the wrench via Bluetooth or infrared. The remote terminal can input information to the wrench. The input information of the wrench head includes the model of the second wrench head and the torque arm L2 of the second wrench head. If the model of the second wrench head is not included, the input module receives the torque arm L2 of the second wrench head and stores it in the storage. The second wrench head can also be detachably connected to the first wrench head; When the first wrench head is detachably mounted on the handle, and the second wrench head is mounted on the end of the first wrench head away from the handle, the processor obtains the torque correction value T2 according to the formula T2=T1*(L1'+L2'+L3) / (L1'+L2').

3. A method for measuring the torque of a wrench, applied to the wrench described in claim 1, characterized in that, include: The input module receives input information about the second wrench head; The wrench applies torque to the workpiece to be tightened, the torque sensor measures the torque value T1, and transmits it to the processor; The processor processes the data based on the input information and the torque measurement value T1 to obtain the torque correction value T2, and then transmits it to the display. The display shows the torque correction value T2.

4. The wrench torque measurement method as described in claim 3, characterized in that, The memory stores data information of the standard lever arm L1 and the second wrench head. The input module receives the installation information of the second wrench head installed at the end of the first wrench head away from the handle and the model information of the second wrench head, and transmits it to the processor. The processor retrieves the torque arm L2 of the second wrench head based on the model information of the second wrench head; or, the input module receives the second wrench head installed at the end of the first wrench head away from the handle and the torque arm L2, and transmits it to the processor. The processor obtains the standard lever arm L1 from the memory and obtains the torque correction value T2 according to the formula T2=T1*(L1+L2) / L1.

5. A method for measuring the torque of a wrench, applied to the wrench described in claim 2, characterized in that, include: The input module receives input information from the wrench head connected to the handle; The wrench applies torque to the workpiece to be tightened, the torque sensor measures the torque value T1, and transmits it to the processor; The processor processes the data based on the input information and the torque measurement value T1 to obtain the torque correction value T2, and then transmits it to the display. The display shows the torque correction value T2.

6. The wrench torque measurement method as described in claim 5, characterized in that, The memory stores the standard lever arm L1', the preset lever arm L2' of the first wrench head, and the data information of the second wrench head. Before the processor processes the torque measurement value T1, the input module receives the installation information of the wrench head and the model information of the second wrench head, and transmits them to the processor. The processor retrieves the torque arm L3 of the second wrench head based on the model information of the second wrench head; or, the input module receives the installation information of the second wrench head installed on the wrench handle and the torque arm L3, and transmits them to the processor.

7. The wrench torque measurement method as described in claim 6, characterized in that, The processor obtains the installation information of the second wrench head on the wrench handle, the standard lever arm L1', the preset lever arm L2', and the torque arm L3, and obtains the torque correction value T2 according to the formula T2=T1*(L1'+L3) / (L1'+L2'); or, The processor obtains the installation information of the second wrench head being installed at the end of the first wrench head away from the handle, the standard lever arm L1', the preset lever arm L2', and the torque arm L3, and obtains the torque correction value T2 according to the formula T2=T1*(L1'+L2'+L3) / (L1'+L2').

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