Tool
Through the combination of measurement and control devices, the electric drill is automatically shut down during the tightening process, solving the problem of cumbersome screw adjustment during disassembly and maintenance, improving the operation convenience and preventing the screw from overshooting.
Patent Information
- Application Number
- CN202422074833.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-08-26
AI Technical Summary
During disassembly and repair, it is difficult for customers to accurately adjust the torque gear of the electric drill to avoid damage to the screw sliding teeth or the case, resulting in cumbersome and inconvenient operation.
The thresholds of the loosening and unloading parameters are measured by the measuring device, and the control device determines the thresholds of the tightening parameters based on the loosening and unloading parameters, and controls the tool to stop when the threshold is reached during the tightening process to achieve self-stop of the screw in place.
Simplifies the operation process, improves the convenience of the tool, prevents overshoot of the screws and avoids damage to the workpiece.
Smart Images
Figure CN223130577U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of tools, and particularly to a tool. Background Art
[0002] When disassembling and repairing a machine, the tool may perform a rotating action to loosen or tighten the workpiece to be operated. For example, an electric drill is used to tighten or loosen screws. Since the customer does not know which torque gear the electric drill needs to be adjusted to ensure that the screw can be tightened without overshooting, if overshooting occurs, it may cause the screw to slip or the machine case to burst. Therefore, the customer usually needs to adjust the gear from low to high until the screw is tightened, and the operation process is relatively cumbersome. Summary of the Utility Model
[0003] In view of this, embodiments of the present application provide a fixed-torque electric tool to solve at least one problem in the background art.
[0004] In a first aspect, embodiments of the present application provide a tool, which includes:
[0005] A measuring device, configured to measure a threshold value of a loosening parameter generated during the process of the tool loosening a first workpiece to be operated; and measure a tightening parameter generated during the process of the tool tightening a second workpiece to be operated having the same specification as the first workpiece;
[0006] A control device, configured to obtain the threshold value of the loosening parameter and the tightening parameter; determine the threshold value of the tightening parameter according to the threshold value of the loosening parameter; and control the tool to stop when the tightening parameter generated during the process of the tool tightening the second workpiece to be operated reaches the threshold value of the tightening parameter.
[0007] In combination with the first aspect, in an optional implementation manner, the threshold value of the tightening parameter is the threshold value of the loosening parameter multiplied by a conversion coefficient.
[0008] In combination with the first aspect, in an optional implementation manner, the loosening parameter corresponds to the tightening parameter;
[0009] The loosening parameter includes any one of the following: loosening current, change in loosening rotation speed, loosening rotation speed change rate, loosening voltage;
[0010] Wherein, the loosening current is the working current of the motor during the process of the tool loosening the first workpiece to be operated; the change in loosening rotation speed is the rotation speed difference between the motor rotation speed when the tool is no-load and the motor rotation speed during the process of the tool loosening the first workpiece to be operated; the loosening rotation speed change rate is the slope of the motor rotation speed curve during the process of the tool loosening the first workpiece to be operated; the loosening voltage is the voltage corresponding to the torque measured by the torque sensor assembly during the process of the tool loosening the first workpiece to be operated.
[0011] The fastening parameters include any one of the following: fastening current, change in fastening rotational speed, rate of change in fastening rotational speed, fastening voltage;
[0012] Wherein, the fastening current is the operating current of the motor during the process of the tool fastening the second workpiece to be operated; the change in fastening rotational speed is the rotational speed difference between the rotational speed of the motor when the tool is unloaded and the rotational speed of the motor during the process of the tool fastening the second workpiece to be operated; the rate of change in fastening rotational speed is the slope of the motor rotational speed curve during the process of the tool fastening the second workpiece to be operated; the fastening voltage is the voltage corresponding to the torque measured by the torque sensor assembly during the process of the tool fastening the second workpiece to be operated.
[0013] In a second aspect, an embodiment of the present application provides a tool, the tool comprising:
[0014] A current measuring device, configured to measure the maximum current of the operating current of the motor during the process of the tool loosening the first workpiece to be operated; and measure the operating current of the motor during the process of the tool fastening a second workpiece to be operated of the same specification as the first workpiece to be operated;
[0015] A control device, configured to obtain the maximum current and the operating current of the motor during the process of the tool fastening the second workpiece to be operated; and determine a fastening current threshold according to the maximum current; and control the tool to stop when the operating current of the motor during the process of the tool fastening the second workpiece to be operated reaches the fastening current threshold.
[0016] In combination with the second aspect, in an optional embodiment, the fastening current threshold is the maximum current multiplied by a first conversion coefficient.
[0017] In a third aspect, an embodiment of the present application provides a tool, the tool comprising:
[0018] A rotational speed measuring device, configured to measure the stable point rotational speed of the motor during the process of the tool loosening the first workpiece to be operated; and measure the rotational speed of the motor during the process of the tool fastening a second workpiece to be operated of the same specification as the first workpiece to be operated; and measure the rotational speed of the motor when the tool is unloaded;
[0019] A control device is configured to obtain the stable point rotational speed, the rotational speed of the motor during the process of the tool fastening the second workpiece to be operated, and the rotational speed of the motor when the tool is unloaded; determine the change amount of the loosening stable point rotational speed based on the rotational speed of the motor when the tool is unloaded and the stable point rotational speed, so as to determine the threshold value of the change amount of the fastening rotational speed according to the change amount of the loosening stable point rotational speed; determine the change amount of the fastening rotational speed based on the rotational speed of the motor when the tool is unloaded and the rotational speed of the motor during the process of the tool fastening the second workpiece to be operated; and control the tool to stop when the change amount of the fastening rotational speed reaches the threshold value of the change amount of the fastening rotational speed.
[0020] Combined with the third aspect, in an alternative embodiment, the threshold value of the change amount of the fastening rotational speed is the change amount of the loosening stable point rotational speed multiplied by a second conversion coefficient.
[0021] Fourth aspect, an embodiment of the present application provides a tool, which includes:
[0022] A rotational speed measuring device is configured to measure the slope of the rotational speed curve of the motor during the process of the tool loosening the first workpiece to be operated; and measure the slope of the rotational speed curve of the motor during the process of the tool fastening the second workpiece to be operated with the same specification as the first workpiece.
[0023] A control device is configured to obtain the slope of the rotational speed curve of the motor during the process of the tool loosening the first workpiece to be operated and the slope of the rotational speed curve of the motor during the process of the tool fastening the second workpiece to be operated; determine the threshold value of the fastening slope based on the slope of the rotational speed curve of the motor during the process of the tool loosening the first workpiece to be operated; and control the tool to stop when the slope of the rotational speed curve of the motor during the process of the tool fastening the second workpiece to be operated reaches the threshold value of the fastening slope.
[0024] Combined with the fourth aspect, in an alternative embodiment, the threshold value of the fastening slope is the slope of the rotational speed curve of the motor during the process of the tool loosening the first workpiece to be operated multiplied by a third conversion coefficient.
[0025] Fifth aspect, an embodiment of the present application provides a tool, which includes:
[0026] A voltage measuring device is configured to measure the maximum voltage of the voltage corresponding to the torque measured by the torque sensor assembly during the process of the tool loosening the first workpiece to be operated; and measure the voltage corresponding to the torque measured by the torque sensor assembly during the process of the tool fastening the second workpiece to be operated with the same specification as the first workpiece.
[0027] A control device is configured to obtain the maximum voltage and the voltage corresponding to the torque measured by the torque sensor assembly during the process of the tool fastening the second workpiece to be operated; determine a fastening voltage threshold according to the maximum voltage; and control the tool to stop when the voltage corresponding to the torque measured by the torque sensor assembly during the process of the tool fastening the second workpiece to be operated reaches the fastening voltage threshold.
[0028] In combination with the fifth aspect, in an alternative embodiment, the fastening voltage threshold is the maximum voltage multiplied by a fourth conversion coefficient.
[0029] The beneficial effects brought by the technical solutions provided in the embodiments of the present application include: by measuring the threshold values of the loosening parameters generated during the process of the tool loosening the first workpiece to be operated and the fastening parameters generated during the process of the tool fastening the second workpiece to be operated of the same specification as the first workpiece respectively, the control device determines the threshold values of the fastening parameters according to the threshold values of the loosening parameters, and controls the tool to stop when the fastening parameters generated during the process of the tool fastening the second workpiece to be operated reach the threshold values of the fastening parameters, so as to use the threshold values of the fastening parameters as the threshold values of the tool stop parameters during the fastening operation, directly achieve fastening without overshooting during the fastening process without adjusting the gears from low to high, realize the purpose of automatic stop of the tool when the screw reaches the position during the fastening process, thereby simplifying the operation, improving the convenience of tool operation, and effectively preventing the problems of the screw overshooting, and then punching through or damaging the workpiece.
[0030] Additional aspects and advantages of the embodiments of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the embodiments of the present application. Description of the Drawings
[0031] The drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:
[0032] Figure 1 is a three-dimensional schematic diagram of a specific example of the tool in the embodiments of the present application;
[0033] Figure 2 is a schematic block diagram of Example 1 of the tool in the embodiments of the present application;
[0034] Figure 3 is a schematic curve diagram of a specific example of the rotational speed / current / torque during loosening in the embodiments of the present application;
[0035] Figure 4Schematic diagram of a curve of rotational speed / current / torque during fastening in an embodiment of the present application;
[0036] Figure 5 Schematic diagram of the principle block diagram of Example 2 of the tool in an embodiment of the present application;
[0037] Figure 6 Schematic diagram of the principle block diagram of Example 3 of the tool in an embodiment of the present application;
[0038] Figure 7 Schematic diagram of the principle block diagram of Example 4 of the tool in an embodiment of the present application;
[0039] Figure 8 Schematic diagram of the principle block diagram of Example 5 of the tool in an embodiment of the present application;
[0040] Figure 9 Schematic diagram of the principle block diagram of a specific example of the control device in an embodiment of the present application. Detailed implementation manners
[0041] To make the technical solutions and beneficial effects of the present utility model more obvious and understandable, the following will be described in detail by listing specific embodiments. Among them, the drawings are not necessarily drawn to scale, and local features can be enlarged or reduced to more clearly show the details of the local features; unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical and scientific fields to which the present application belongs.
[0042] The embodiments of the present application are not an exhaustive list, but only schematic diagrams of some embodiments, and do not constitute a specific limitation on the protection scope of the present application. Without contradiction, each step in an embodiment can be implemented as an independent embodiment, and the steps can be combined arbitrarily. For example, the solution after removing some steps in an embodiment can also be implemented as an independent embodiment, and the order of the steps in an embodiment can be arbitrarily exchanged. In addition, the optional implementation manners in an embodiment can be combined arbitrarily; furthermore, the embodiments can be combined arbitrarily. For example, some or all of the steps of different embodiments can be combined arbitrarily, and an embodiment can be combined arbitrarily with the optional implementation manners of other embodiments.
[0043] In each embodiment of the present application, if there is no special explanation and logical conflict, the terms and / or descriptions between the embodiments are consistent and can be cited from each other. The technical features in different embodiments can be combined to form new embodiments according to their internal logical relationships.
[0044] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and do not constitute a limitation on the present application.
[0045] In the embodiments of the present application, unless otherwise specified, elements expressed in the singular form, such as "a", "an", "the", "above-mentioned", "said", "aforementioned", "this", etc., may mean "one and only one", or may also mean "one or more", "at least one", etc. For example, in the case of using articles such as "a", "an", "the" in English translation, the noun following the article can be understood as a singular expression form or a plural expression form.
[0046] In the embodiments of the present application, "a plurality of" means two or more. In some embodiments, terms such as "at least one of", "one or more", "a plurality of", "multiple", etc. can be replaced with each other.
[0047] Prefix words such as "first", "second", etc. in the embodiments of the present application are only used to distinguish different described objects, and do not constitute limitations on the position, order, priority, value, or content of the described objects. The statements of the described objects refer to the descriptions in the context of the claims or embodiments, and should not constitute redundant limitations due to the use of prefix words. For example, the value of the described object is not limited by the ordinal number and can be one or more. Taking "the first device" as an example, the value of "device" can be one or more. In addition, the objects modified by different prefix words can be the same or different. For example, if the described object is "device", then "the first device" and "the second device" can be the same device or different devices, and their types can be the same or different.
[0048] In some embodiments, the term "connection" may mean that there is a transfer of electrical signals or data between the connected end and the connected-to end, and can be understood as "electrical connection", "communication connection", etc. "Connection" can be a direct connection between two components, or an indirect connection established through other components, or a connection within two components, or any other possible connection form.
[0049] The embodiments of the present application provide a tool. Figure 1 A three-dimensional schematic diagram showing a specific example of the tool in the embodiments of the present application is shown. Exemplarily, the tool may include a screwdriver / electric screwdriver, a wrench, a screwdriver, or other tools that can perform a rotational action to loosen or fasten the workpiece to be operated. For example, the workpiece to be operated may include screws, bolts, etc.
[0050] Figure 2 A schematic block diagram showing Example 1 of the tool in the embodiments of the present application is shown. As shown in the figure, the tool may include:
[0051] A measuring device 101 is configured to measure a threshold value of a loosening parameter generated during the process of the tool loosening the first workpiece to be operated; and measure a tightening parameter generated during the process of the tool tightening a second workpiece to be operated of the same specification as the first workpiece to be operated.
[0052] A control device 102 is configured to obtain the threshold value of the loosening parameter and the tightening parameter; determine the threshold value of the tightening parameter according to the threshold value of the loosening parameter; and control the tool to stop operating when the tightening parameter generated during the process of the tool tightening the second workpiece to be operated reaches the threshold value of the tightening parameter.
[0053] In the embodiments of the present application, the first workpiece to be operated and the second workpiece to be operated may be the same workpiece to be operated, or may be different workpieces to be operated of the same specification. For example, the tool may loosen and tighten the same screw, or may loosen a first screw and tighten a second screw, and the first screw and the second screw are of the same specification.
[0054] The same specification may be a process of uniformly specifying and standardizing the attributes or characteristics of products. Multiple products of the same specification may include the same volume, length, shape, weight, etc.
[0055] Exemplarily, the torque for loosening a screw > the torque for tightening a screw, and there is a set coefficient relationship between the two. Thus, the threshold value of the tightening parameter can be determined according to the threshold value of the loosening parameter.
[0056] In some possible implementation manners, the working mode of the tool may be a learning mode. Exemplarily, the tool may be set to the learning mode. When the user disassembles the machine, by detecting the torque when loosening the screw (there is a set relationship between the torque when loosening the screw and the torque when tightening the screw), and multiplying the torque by a coefficient to obtain a torque threshold value, when tightening the screw, there is no need to adjust the gear position, and the screw can be directly tightened when the torque reaches the torque threshold value.
[0057] In this way, in the embodiments of the present application, the measuring device measures the threshold value of the loosening parameter generated during the process of the tool loosening the first workpiece to be operated and the tightening parameter generated during the process of the tool tightening the second workpiece to be operated of the same specification as the first workpiece to be operated respectively. The control device determines the threshold value of the tightening parameter according to the threshold value of the loosening parameter and controls the tool to stop operating when the tightening parameter generated during the process of the tool tightening the second workpiece to be operated reaches the threshold value of the tightening parameter. Thus, the threshold value of the tightening parameter is used as the threshold value of the tool stop parameter during the tightening operation, and it is possible to directly achieve tightening without overshooting during the tightening process without adjusting the gear position from low to high, achieving the purpose of automatically stopping when the screw is in place during the tool tightening process, thereby simplifying the operation, improving the convenience of tool operation, and effectively preventing the problem of the screw overshooting and then punching through or damaging the workpiece.
[0058] In an alternative embodiment, the threshold value of the fastening parameter is the threshold value of the loosening parameter multiplied by a conversion coefficient.
[0059] In this way, by means of the correspondence between the threshold value of the loosening parameter and the threshold value of the fastening parameter of screws of the same specification, the threshold value of the fastening parameter is obtained by multiplying the threshold value of the loosening parameter by a preset conversion coefficient, which is used as the threshold value of the shutdown parameter of the tool during the fastening operation, providing a determination condition for the tool to stop automatically when the screw is in place during the fastening process.
[0060] Exemplarily, the conversion coefficient can be obtained by statistical analysis of test data. For example, the value range of the conversion coefficient a can be 0.7 - 0.9.
[0061] In an alternative embodiment, the loosening parameter corresponds to the fastening parameter;
[0062] The loosening parameter includes any one of the following: loosening current, change in loosening rotational speed, rate of change of loosening rotational speed, loosening voltage;
[0063] Among them, the loosening current is the working current of the motor during the process of the tool loosening the first workpiece to be operated; the change in loosening rotational speed is the rotational speed difference between the rotational speed of the motor when the tool is unloaded and the rotational speed of the motor during the process of the tool loosening the first workpiece to be operated; the rate of change of loosening rotational speed is the slope of the motor rotational speed curve during the process of the tool loosening the first workpiece to be operated; the loosening voltage is the voltage corresponding to the torque measured by the torque sensor assembly during the process of the tool loosening the first workpiece to be operated.
[0064] The fastening parameter includes any one of the following: fastening current, change in fastening rotational speed, rate of change of fastening rotational speed, fastening voltage;
[0065] Among them, the fastening current is the working current of the motor during the process of the tool fastening the second workpiece to be operated; the change in fastening rotational speed is the rotational speed difference between the rotational speed of the motor when the tool is unloaded and the rotational speed of the motor during the process of the tool fastening the second workpiece to be operated; the rate of change of fastening rotational speed is the slope of the motor rotational speed curve during the process of the tool fastening the second workpiece to be operated; the fastening voltage is the voltage corresponding to the torque measured by the torque sensor assembly during the process of the tool fastening the second workpiece to be operated.
[0066] Exemplarily, the loosening parameter and the fastening parameter can be the same. For example, if the loosening parameter is the loosening current, then the fastening parameter is the fastening current; the corresponding relationships of other parameter items can be obtained in the same way and will not be enumerated here.
[0067] Figure 3 A curve schematic diagram showing a specific example of rotational speed / current / torque during loosening in an embodiment of the present application is shown. Figure 4The figure shows a schematic curve diagram of a specific example of rotational speed / current / torque during fastening in an embodiment of the present application. As shown in the figure, n is the rotational speed of the motor, I is the operating current of the motor, and T is the torque. Figure 3 In it, nmax is the maximum rotational speed of the motor during loosening, n1 is the stable point rotational speed of the motor during loosening, Imax is the maximum current of the motor during loosening, and Tmax is the maximum torque during loosening. Figure 4 In it, nmax is the maximum rotational speed of the motor during fastening, n1 is the stable point rotational speed of the motor during fastening, Imax is the maximum current of the motor during fastening, and Tmax is the maximum torque during fastening.
[0068] In this way, by using the loosening parameters and the fastening parameters, which can be any one of current, rotational speed change amount, rotational speed change rate, and voltage, the tool can achieve self-stop when the screw reaches the proper position during the tool fastening process from multiple aspects, expanding the applicable range of the tool.
[0069] The embodiment of the present application also provides a tool. Figure 5 The figure shows a schematic block diagram of the second example of the tool in the embodiment of the present application. As shown in the figure, the tool includes:
[0070] A current measuring device 201, configured to measure the maximum current of the operating current of the motor during the process of the tool loosening the first workpiece; and measure the operating current of the motor during the process of the tool fastening the second workpiece of the same specification as the first workpiece.
[0071] A control device 202, configured to obtain the maximum current and the operating current of the motor during the process of the tool fastening the second workpiece; determine a fastening current threshold according to the maximum current; and control the tool to stop when the operating current of the motor during the process of the tool fastening the second workpiece reaches the fastening current threshold.
[0072] Exemplarily, the tool is set to the learning mode. When the tool operates in this mode, the current measuring device 201 measures the maximum current I of the operating current of the motor during the process of the tool loosening the first workpiece 松 , and the operating current I of the motor during the process of the tool fastening the second workpiece 紧 . When I 紧 ≥I 阈值 (fastening current threshold), control the tool to stop, so that the screw can be tightened without the user adjusting the gear, realizing self-stop.
[0073] In an alternative embodiment, the fastening current threshold is the maximum current multiplied by a first conversion coefficient.
[0074] Exemplarily, I 阈值 (fastening current threshold) = a1 (first conversion coefficient) × I 松 .
[0075] Then, when I 紧 ≥a1×I 松 , control the tool to stop.
[0076] The embodiment of the present application also provides a tool. Figure 6 The schematic diagram of the principle block diagram of Example 3 of the tool in the embodiment of the present application is shown. As shown in the figure, the tool includes:
[0077] A rotational speed measuring device 301, configured to measure the stable point rotational speed of the motor rotational speed during the process of the tool loosening the first workpiece to be operated; and measure the motor rotational speed during the process of the tool tightening the second workpiece to be operated with the same specification as the first workpiece; and measure the motor rotational speed when the tool is unloaded;
[0078] A control device 302, configured to obtain the stable point rotational speed, the motor rotational speed during the process of the tool tightening the second workpiece to be operated, and the motor rotational speed when the tool is unloaded; and determine the change amount of the loosening stable point rotational speed according to the motor rotational speed when the tool is unloaded and the stable point rotational speed, so as to determine the threshold value of the change amount of the tightening rotational speed according to the change amount of the loosening stable point rotational speed; and determine the change amount of the tightening rotational speed according to the motor rotational speed when the tool is unloaded and the motor rotational speed during the process of the tool tightening the second workpiece to be operated; and control the tool to stop when the change amount of the tightening rotational speed reaches the threshold value of the change amount of the tightening rotational speed.
[0079] In the embodiment of the present application, as Figure 3 shown, when the motor rotational speed continues to rise after reaching the stable point rotational speed n1, it is determined that the process of the rotational speed rising to the stable point rotational speed n1 is the loosening process.
[0080] Exemplarily, set the tool to the learning mode. When the tool runs in this mode, the rotational speed measuring device 301 measures the stable point rotational speed n of the motor rotational speed during the process of the tool loosening the first workpiece to be operated 松 , the motor rotational speed n during the process of the tool tightening the second workpiece to be operated 紧 , and the motor rotational speed n when the tool is unloaded 空 . Calculate the rotational speed difference between the motor rotational speed n when the tool is unloaded 空 and the stable point rotational speed n 松 to obtain the change amount of the loosening stable point rotational speed Δn = n 空 -n 松 . Calculate the rotational speed difference between the motor rotational speed n when the tool is unloaded 空 and the motor rotational speed n during the process of the tool tightening the second workpiece to be operated 紧 to obtain the change amount of the tightening rotational speed n 空 -n 紧 . When n 空-n 紧 ≥Δn 阈值 (When the threshold value of the fastening rotational speed change amount), control the tool to stop, so that the screw can be tightened without the user adjusting the gear, realizing self-stop.
[0081] In an optional embodiment, the threshold value of the fastening rotational speed change amount is the rotational speed change amount of the loosening stable point multiplied by a second conversion coefficient.
[0082] Exemplarily, Δn 阈值 (The threshold value of the fastening rotational speed change amount) = a2 (the second conversion coefficient) × Δn. Then, when n 空 -n 紧 ≥a2×Δn, control the tool to stop.
[0083] The embodiment of the present application also provides a tool. Figure 7 The schematic diagram of the principle block diagram of Example 4 of the tool in the embodiment of the present application is shown. As shown in the figure, the tool includes:
[0084] A rotational speed measuring device 401, configured to measure the slope of the motor rotational speed curve during the process of the tool loosening the first workpiece to be operated; and measure the slope of the motor rotational speed curve during the process of the tool fastening the second workpiece to be operated of the same specification as the first workpiece;
[0085] A control device 402, configured to obtain the slope of the motor rotational speed curve during the process of the tool loosening the first workpiece to be operated and the slope of the motor rotational speed curve during the process of the tool fastening the second workpiece to be operated; and determine a fastening slope threshold according to the slope of the motor rotational speed curve during the process of the tool loosening the first workpiece to be operated; and control the tool to stop when the slope of the motor rotational speed curve during the process of the tool fastening the second workpiece to be operated reaches the fastening slope threshold.
[0086] Exemplarily, set the tool to the learning mode. When the tool runs in this mode, the rotational speed measuring device 401 measures the slope K of the motor rotational speed curve during the process of the tool loosening the first workpiece to be operated 松 , and the slope K of the motor rotational speed curve during the process of the tool fastening the second workpiece to be operated 紧 . When K 紧 ≥K 阈值 (The fastening slope threshold), control the tool to stop, so that the screw can be tightened without the user adjusting the gear, realizing self-stop.
[0087] In an optional embodiment, the fastening slope threshold is the slope of the motor rotational speed curve during the process of the tool loosening the first workpiece to be operated multiplied by a third conversion coefficient.
[0088] Exemplarily, K 阈值(Tightening slope threshold) = a3 (third conversion coefficient) × K 松 (or ΔK, ΔK = K 空 -K 松 , K 空 = 0, K 空 is the slope of the motor speed curve when the motor is unloaded).
[0089] Then, when K 紧 ≥ a3 × K 松 , control the tool to stop.
[0090] The embodiment of the present application also provides a tool, Figure 8 which shows the schematic diagram of the principle block diagram of Example 5 of the tool in the embodiment of the present application. As shown in the figure, the tool includes:
[0091] A voltage measuring device 501, configured to measure the maximum voltage of the voltage corresponding to the torque measured by the torque sensor assembly during the process of the tool loosening the first workpiece to be operated; and measure the voltage corresponding to the torque measured by the torque sensor assembly during the process of the tool tightening the second workpiece to be operated with the same specification as the first workpiece;
[0092] A control device 502, configured to obtain the maximum voltage and the voltage corresponding to the torque measured by the torque sensor assembly during the process of the tool tightening the second workpiece to be operated; and determine a tightening voltage threshold according to the maximum voltage; and control the tool to stop when the voltage corresponding to the torque measured by the torque sensor assembly during the process of the tool tightening the second workpiece to be operated reaches the tightening voltage threshold.
[0093] Exemplarily, a torque sensor assembly can be added to a certain level of internal gear ring. Set the tool to the learning mode. When the tool runs, the internal gear ring rotates in the same direction under force, driving the strain gauge on the torque sensor assembly to deform, the resistance value changes, and then the voltage changes. There is a proportional relationship among torque, resistance value, and voltage. The voltage measuring device 501 measures the maximum voltage U 松 of the voltage corresponding to the torque measured by the torque sensor assembly during the process of the tool loosening the first workpiece to be operated, and the voltage U 紧 corresponding to the torque measured by the torque sensor assembly during the process of the tool tightening the second workpiece to be operated. When U 紧 ≥ U 阈值 (tightening voltage threshold), control the tool to stop, so that the screw can be tightened without the user adjusting the gear, realizing self-stop.
[0094] In an alternative embodiment, the tightening voltage threshold is the maximum voltage multiplied by a fourth conversion coefficient.
[0095] Exemplarily, U 阈值(Fastening voltage threshold) = a4 (Fourth conversion coefficient) × U 松 。
[0096] Then, when U 紧 ≥ a4 × U 松 the control tool is stopped.
[0097] In some possible implementation manners, the control devices 102, 202, 302, 402, and 502 in the above embodiments may all include a processor and a memory. The processor is connected to the memory, and instructions are stored in the memory. The processor calls the instructions stored in the memory to implement the functions of each control device.
[0098] Figure 9 The schematic diagram of the principle block diagram of a specific example of the control device in the embodiment of the present application is shown. As shown in the figure, the processor may be a circuit with signal processing capabilities. In one implementation, the processor may be a circuit with instruction reading and running capabilities, such as a Central Processing Unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a kind of microprocessor), or a digital signal processor (DSP), etc.; in another implementation, the processor may implement certain functions through the logical relationship of a hardware circuit, and the logical relationship of the above hardware circuit is fixed or can be reconstructed. For example, the processor is a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document to implement the configuration of the hardware circuit can be understood as the process of the processor loading instructions to implement the functions described by the instructions. In addition, it may also be a hardware circuit designed for artificial intelligence, which can be understood as a kind of ASIC, such as a Neural Network Processing Unit (NPU), a Tensor Processing Unit (TPU), a Deeplearning Processing Unit (DPU), etc. The control device 200 may be entirely implemented in the form of the processor calling software, or entirely implemented in the form of a hardware circuit, or partially implemented in the form of the processor calling software, and the remaining part is implemented in the form of a hardware circuit.
[0099] The memory may include one or more computer program products, and the computer program products may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. Volatile memory may include, for example, random access memory (RAM) and / or cache memory, etc. Non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor may run the program instructions to implement the functions of each control device and / or other desired functions.
[0100] The control device may further include a network interface, a display, and an input device connected through a system bus. Among them, the network interface is used to communicate with an external terminal through a network connection. The display may be a liquid crystal display or an electronic ink display. The input device may be a touch layer covering the display, or a button, a trackball, or a touchpad, or may also be an external keyboard, touchpad, or mouse, etc.
[0101] In some possible implementation manners, the measurement device 101, the current measurement device 201, the rotational speed measurement device 301, the rotational speed measurement device 401, and the voltage measurement device 501 in the above embodiments may all be implemented by a hardware circuit and may be set according to actual requirements.
[0102] From the test data of the tool during loosening and tightening as shown in the following table, it can be obtained that the value range of the conversion coefficient a is 0.7 - 0.9, thereby verifying the corresponding relationship between the loosening parameter threshold and the tightening parameter threshold of the workpieces of the same specification.
[0103]
[0104] It should be understood that the above embodiments are all exemplary and do not cover all possible implementation manners included in the claims. Without departing from the scope of the present disclosure, various deformations and changes may be made based on the above embodiments. Similarly, the technical features of the above embodiments may be arbitrarily combined to form additional embodiments of the present application that may not be explicitly described. Therefore, the above embodiments only represent several implementation manners of the present application and do not limit the protection scope of the patent of the present application.
Claims
1. A tool, characterized in that, The tool includes: A measuring device, configured to measure a threshold value of a loosening parameter generated during the process of the tool loosening a first workpiece to be operated; and measure a tightening parameter generated during the process of the tool tightening a second workpiece to be operated having the same specification as the first workpiece; A control device, configured to obtain the threshold value of the loosening parameter and the tightening parameter; determine the threshold value of the tightening parameter according to the threshold value of the loosening parameter; and control the tool to stop when the tightening parameter generated during the process of the tool tightening the second workpiece to be operated reaches the threshold value of the tightening parameter.
2. The tool according to claim 1, characterized in that, The threshold value of the tightening parameter is the threshold value of the loosening parameter multiplied by a conversion coefficient.
3. The tool according to claim 1, characterized in that, The loosening parameter corresponds to the tightening parameter; The loosening parameter includes any one of the following: loosening current, loosening rotational speed change amount, loosening rotational speed change rate, loosening voltage; Wherein, the loosening current is the working current of the motor during the process of the tool loosening the first workpiece to be operated; the loosening rotational speed change amount is the rotational speed difference between the rotational speed of the motor when the tool is idling and the rotational speed of the motor during the process of the tool loosening the first workpiece to be operated; the loosening rotational speed change rate is the slope of the motor rotational speed curve during the process of the tool loosening the first workpiece to be operated; the loosening voltage is the voltage corresponding to the torque measured by the torque sensor assembly during the process of the tool loosening the first workpiece to be operated. The tightening parameter includes any one of the following: tightening current, tightening rotational speed change amount, tightening rotational speed change rate, tightening voltage; Wherein, the tightening current is the working current of the motor during the process of the tool tightening the second workpiece to be operated; the tightening rotational speed change amount is the rotational speed difference between the rotational speed of the motor when the tool is idling and the rotational speed of the motor during the process of the tool tightening the second workpiece to be operated; the tightening rotational speed change rate is the slope of the motor rotational speed curve during the process of the tool tightening the second workpiece to be operated; the tightening voltage is the voltage corresponding to the torque measured by the torque sensor assembly during the process of the tool tightening the second workpiece to be operated.
4. A tool, characterized in that, The tool includes: A current measuring device, configured to measure the maximum current of the working current of the motor during the process of the tool loosening the first workpiece to be operated; and measure the working current of the motor during the process of the tool tightening a second workpiece to be operated having the same specification as the first workpiece; A control device, configured to obtain the maximum current and the working current of the motor during the process of the tool tightening the second workpiece to be operated; determine a tightening current threshold according to the maximum current; and control the tool to stop when the working current of the motor during the process of the tool tightening the second workpiece to be operated reaches the tightening current threshold.
5. The tool according to claim 4, characterized in that, The tightening current threshold is the maximum current multiplied by a first conversion coefficient.
6. A tool, characterized in that, The tool includes: A rotational speed measuring device, configured to measure the stable point rotational speed of the motor during the process of the tool loosening the first workpiece to be operated; measure the rotational speed of the motor during the process of the tool tightening a second workpiece to be operated having the same specification as the first workpiece; and measure the rotational speed of the motor when the tool is idling; A control device is configured to obtain the stable point rotational speed, the motor rotational speed during the process of the tool fastening the second workpiece to be operated, and the motor rotational speed when the tool is unloaded; and determine the change amount of the loosening stable point rotational speed based on the motor rotational speed when the tool is unloaded and the stable point rotational speed, so as to determine the threshold value of the change amount of the fastening rotational speed according to the change amount of the loosening stable point rotational speed; and determine the change amount of the fastening rotational speed based on the motor rotational speed when the tool is unloaded and the motor rotational speed during the process of the tool fastening the second workpiece to be operated; and control the tool to stop operating when the change amount of the fastening rotational speed reaches the threshold value of the change amount of the fastening rotational speed.
7. The tool according to claim 6, characterized in that, The threshold value of the change amount of the fastening rotational speed is the change amount of the loosening stable point rotational speed multiplied by a second conversion coefficient.
8. A tool, characterized in that, The tool includes: A rotational speed measuring device is configured to measure the slope of the motor rotational speed curve during the process of the tool loosening the first workpiece to be operated; and measure the slope of the motor rotational speed curve during the process of the tool fastening the second workpiece to be operated with the same specification as the first workpiece. A control device is configured to obtain the slope of the motor rotational speed curve during the process of the tool loosening the first workpiece to be operated and the slope of the motor rotational speed curve during the process of the tool fastening the second workpiece to be operated; and determine the threshold value of the fastening slope based on the slope of the motor rotational speed curve during the process of the tool loosening the first workpiece to be operated; and control the tool to stop operating when the slope of the motor rotational speed curve during the process of the tool fastening the second workpiece to be operated reaches the threshold value of the fastening slope.
9. The tool according to claim 8, wherein The threshold value of the fastening slope is the slope of the motor rotational speed curve during the process of the tool loosening the first workpiece to be operated multiplied by a third conversion coefficient.
10. A tool, characterized in that, The tool includes: A voltage measuring device is configured to measure the maximum voltage of the voltage corresponding to the torque measured by the torque sensor assembly during the process of the tool loosening the first workpiece to be operated; and measure the voltage corresponding to the torque measured by the torque sensor assembly during the process of the tool fastening the second workpiece to be operated with the same specification as the first workpiece. A control device is configured to obtain the maximum voltage and the voltage corresponding to the torque measured by the torque sensor assembly during the process of the tool fastening the second workpiece to be operated; and determine the threshold value of the fastening voltage based on the maximum voltage; and control the tool to stop operating when the voltage corresponding to the torque measured by the torque sensor assembly during the process of the tool fastening the second workpiece to be operated reaches the threshold value of the fastening voltage.
11. The tool according to claim 10, characterized in that, The threshold value of the fastening voltage is the maximum voltage multiplied by a fourth conversion coefficient.