Electric screwdriver
By setting up a force detection component in the electric batch to connect the shell and the transmission structure, the rapid and accurate control of the output torque is achieved, and the shortcomings in the existing electric batches in tightening accuracy and detection accuracy are solved, the structure is simplified and the detection accuracy is improved.
Patent Information
- Application Number
- CN202422404497.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-08-08
- Estimated Expiration
- 2034-09-30
AI Technical Summary
The existing electric batches are insufficient in tightening accuracy control, which is prone to excessive torque or excessive torque. The existing torque detection structure is complex and takes up a large space. Torque detection is not suitable for open-loop control and current feedback closed-loop control is not accurate enough.
The force detection component is arranged in the housing of the electric batch, and the housing and the output shaft are connected through the transmission structure to realize torque detection and real-time transmission to the control board, real-time torque closed-loop control is realized.
It realizes rapid and precise control and adjustment of the output torque, simplifies the structure, reduces space occupation, and improves detection accuracy.
Smart Images
Figure CN223198943U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of electric tools, and in particular to an electric screwdriver. Background Art
[0002] Electric screwdrivers are widely used in industrial production to tighten and loosen screws and nuts. Especially with the rapid development of industries such as automobiles, 3C products, aerospace, precision machinery and medical equipment, the requirements for the assembly of precision parts are becoming increasingly higher.
[0003] Although traditional electric screwdrivers can perform basic tightening and loosening operations, they have some limitations in actual use. For example, they lack control over the tightening precision of screws, which can easily lead to excessive or insufficient torque.
[0004] With the development of industrial automation and intelligent manufacturing, higher requirements are placed on the precise control, data recording and human-computer interaction of electric batch machines.
[0005] Although the existing electric screwdrivers are equipped with force detection structures, these structures are all set on the main shaft outside the shell and are connected to an external controller, which then controls the motor of the electric screwdriver. This structural form is not only complex, but also requires a larger installation space for the electric screwdriver. In addition, the torque detected by the external force detection structure is generally only suitable for open-loop control and does not have time correction capability.
[0006] In addition, some existing electric screwdrivers use the torque detected by the detection structure for open-loop control. However, such electric screwdrivers generally only use current feedback for closed-loop control, which is not accurate enough.
[0007] Therefore, there is an urgent need for an electric screwdriver that can control the output torque more quickly and accurately to overcome the above-mentioned defects. Utility Model Content
[0008] The purpose of this application is to provide an electric screwdriver that is conducive to faster and more accurate output torque control.
[0009] To achieve the above-mentioned purpose, an embodiment of the present application provides an electric screwdriver, including a shell, a rotary driver, a transmission structure, an output shaft and a force detection component; the rotary driver, transmission structure and force detection component are all arranged in the shell; the shell is provided with a through hole, and the output shaft passes through the shell through the through hole, and the end of the output shaft located outside the shell is detachably connected to a batch nozzle, and the end of the output shaft located inside the shell is connected to the transmission structure; the force detection component is respectively connected to the shell and the transmission structure; the output end of the rotary driver is connected to the transmission structure, the rotary driver drives the transmission structure, and drives the output shaft to rotate through the transmission structure.
[0010] In some embodiments of the present application, the transmission structure includes a reduction device arranged between the rotation driver and the output shaft, and the force detection component is arranged between the reduction device and the output shaft along the power transmission path of the transmission structure.
[0011] In some embodiments of the present application, the transmission structure also includes a first transmission member, one end of which is connected to the reduction device, and the other end of the first transmission member is connected to the output shaft. The reduction device can drive the output shaft to rotate through the first transmission member, and the force detection component is arranged between the first transmission member and the output shaft along the power transmission path of the transmission structure.
[0012] In some embodiments of the present application, the transmission structure also includes a second transmission member, one end of the second transmission member is connected to the first transmission member, and the other end of the second transmission member is connected to the output shaft, and the force detection component is arranged between the second transmission member and the output shaft along the power transmission path of the transmission structure.
[0013] In some embodiments of the present application, the force detection component is connected to the second transmission member.
[0014] In some embodiments of the present application, the force detection assembly includes a fixing member and a strain detection member, the fixing member is fixedly connected to the housing, and the strain detection member is arranged on the fixing member and abuts against the second transmission member.
[0015] In some embodiments of the present application, the fixing member has a through hole, the second transmission member is inserted into the through hole, the fixing member is provided with a mounting hole connected to the through hole, the strain detection member is arranged in the mounting hole, and extends into the through hole to abut against the second transmission member.
[0016] In some embodiments of the present application, one end of the fixing member close to the through hole is fixedly connected to the housing, and one end of the fixing member away from the through hole is fixedly connected to the outer shell of the reduction gear.
[0017] In some embodiments of the present application, a plurality of mounting holes are provided around the second transmission member, and the strain detection member is provided in all of the mounting holes.
[0018] In some embodiments of the present application, the first transmission member is an external spline shaft, the second transmission member is an internal spline shaft, and the first transmission member is inserted into the second transmission member and is spline-connected to the second transmission member.
[0019] Compared with the prior art, in the electric screwdriver of the embodiment of the present application, the force detection component is respectively connected to the shell and the transmission structure, so that the force detection component can detect the rotational torque of the position in the transmission structure, and can transmit the detected torque data to the control board inside the screwdriver in real time, so as to realize the torque closed-loop control of the electric screwdriver at the same time as the original current control, thereby achieving more rapid and accurate control and adjustment of the output torque. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0021] Figure 1 A three-dimensional diagram of an electric screwdriver according to an embodiment of the present application.
[0022] Figure 2 for Figure 1 The three-dimensional view of the electric screwdriver shown behind the hidden part of the shell.
[0023] Figure 3 for Figure 1 The diagram shows the internal structure of the electric screwdriver behind the hidden shell and control panel.
[0024] Figure 4 for Figure 3 A perspective view of the force detection assembly shown. DETAILED DESCRIPTION
[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.
[0026] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.
[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.
[0028] First of all, in the description of the embodiments of the present application, it needs to be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.
[0029] Secondly, the terms "first", "second", "third", etc. are only used to distinguish descriptions, without any distinction of order or importance, and cannot be understood as indicating or implying relative importance. The characteristics specified as "first" or "second" may explicitly or implicitly include one or more such characteristics.
[0030] Furthermore, terms such as "horizontal" and "vertical" do not imply that a component must be absolutely horizontal or suspended; rather, a slight tilt is permitted. For example, "horizontal" simply means that the direction is more horizontal than "vertical," and does not imply that the structure must be completely horizontal; rather, a slight tilt is permitted. The term "along a certain direction" does not imply that the component must be absolutely parallel to that direction; rather, it can be offset, meaning that a component in that direction is sufficient.
[0031] In addition, it should be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, electromagnetic connections, or even communication connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.
[0032] In addition, the term "and / or" in this application, such as "Feature 1 and / or Feature 2", refers to the possibility of "Feature 1" alone, "Feature 2" alone, or "Feature 1 plus Feature 2". The term "and / or" in this application, such as "Feature 1 and / or Feature 2", refers to the possibility of "Feature 1" alone, "Feature 2" alone, or "Feature 1 plus Feature 2".
[0033] like Figure 1-4As shown, the electric batching machine 1 of the embodiment of the present application includes a housing 10, a rotary driver 20, a transmission structure 30, an output shaft 40 and a force detection component 50; the rotary driver 20, the transmission structure 30 and the force detection component 50 are all arranged in the housing 10; the housing 10 is provided with a through hole 10a, and the output shaft 40 passes through the housing 10 through the through hole 10a, and the end of the output shaft 40 located outside the housing 10 is detachably connected to the batch nozzle 1a, and the end of the output shaft 40 located inside the housing 10 is connected to the transmission structure 30; the force detection component 50 is respectively connected to the housing 10 and the transmission structure 30 to detect the torque of the part of the transmission structure 30 to which the force detection component 50 is connected relative to the housing 10; the output end of the rotary driver 20 is connected to the transmission structure 30, and the rotary driver 20 drives the transmission structure 30, and drives the output shaft 40 to rotate through the transmission structure 30. More specifically, as follows:
[0034] like Figure 1-4 As shown, the transmission structure 30 includes a speed reduction device 60 disposed between the rotary driver 20 and the output shaft 40, so that the rotary driver 20 drives the output shaft 40 to rotate after the speed is reduced and the torque is increased by the speed reducer 60. Preferably, as Figure 1-4 As shown, the rotary driver 20 is a motor. Of course, in other embodiments, the rotary driver 20 may also be other driving units, so the present invention is not limited thereto.
[0035] like Figure 1-4 As shown, the transmission structure 30 also includes a first transmission member 31, one end of the first transmission member 31 is connected to the reduction device 60, and the other end of the first transmission member 31 is connected to the output shaft 40. The reduction device 60 can drive the output shaft 40 to rotate through the first transmission member 31, and the force detection component 50 is arranged between the first transmission member 31 and the output shaft 40 along the power transmission path of the transmission structure 30.
[0036] like Figure 1-4 As shown, the transmission structure 30 also includes a second transmission member 32, one end of the second transmission member 32 is connected to the first transmission member 31, and the other end of the second transmission member 32 is connected to the output shaft 40, and the force detection component 50 is arranged between the second transmission member 32 and the output shaft 40 along the power transmission path of the transmission structure 30.
[0037] like Figure 1-4As shown, the force detection component 50 is connected to the second transmission member 32 to detect the torque of the second transmission member 32 relative to the housing 10; of course, according to actual conditions, the force detection component 50 can be connected to the first transmission member 31 to detect the torque of the first transmission member 31 relative to the housing 10; or, the force detection component 50 is connected to the output end of the reduction gear 60 to detect the torque of the output end of the reduction gear 60 relative to the housing 10; or, the force detection component 50 is connected to the input end of the reduction gear 60 to detect the torque of the output end of the reduction gear 60 relative to the housing 10; or, the force detection component 50 is connected to the output end of the rotation driver 20 to detect the torque of the output end of the rotation driver 20 relative to the housing 10, so it is not limited to this.
[0038] The force detection component 50 described in this application is arranged in the transmission structure 30, which should be understood as: the force detection component 50 is connected to any part of the transmission structure 30, such as but not limited to the input end of the deceleration device 60 in the embodiment of the present application, the output end of the deceleration device 60, the first transmission member 31, and the second transmission member 32.
[0039] The force detection component 50 described in this application is arranged between the reduction device 60 and the output shaft 40 along the power transmission path of the transmission structure 30. It should be understood that: the force detection component 50 is connected to any power transmission structure between the output end of the reduction device 60 and the output shaft 40, such as but not limited to the input end of the reduction device 60, the output end of the reduction device 60, the first transmission member 31, and the second transmission member 32 in the embodiment of the present application.
[0040] like Figure 1-4 As shown, the force detection component 50 includes a fixing part 51 and a strain detection part 52. The fixing part 51 is fixedly connected to the shell 10. The strain detection part 52 is arranged on the fixing part 51 and abuts against the second transmission part 32 to ensure accurate detection of the torque of the second transmission part 32 relative to the shell 10, and make the structure among the force detection component 50, the shell 10 and the second transmission part 32 more reasonable and compact.
[0041] like Figure 1-4 As shown, the fixing member 51 has a through hole 51a, the second transmission member 32 is inserted into the through hole 51a, the fixing member 51 is provided with a mounting hole 51b connected to the through hole 10a, the strain detection member 52 is arranged in the mounting hole 51b, and extends into the through hole 10a to abut against the second transmission member 32, so that the structure of the force detection component 50 is more reasonable and compact.
[0042] like Figure 1-4 As shown, one end of the fixing member 51 close to the through hole 10a is fixedly connected to the housing 10, and the other end of the fixing member 51 away from the through hole 10a is fixedly connected to the outer shell of the reduction gear 60, so that the fixing member 51 can be fixed more firmly.
[0043] like Figure 1-4 As shown, a plurality of mounting holes 51 b are provided around the second transmission member 32 , and strain detection members 52 are provided in all mounting holes 51 b to further ensure accurate detection of the torque of the second transmission member 32 relative to the housing 10 .
[0044] like Figure 1-4 As shown, the first transmission member 31 is an external spline shaft, and the second transmission member 32 is an internal spline shaft. The first transmission member 31 is inserted into the second transmission member 32 and is spline-connected with the second transmission member 32 to achieve power transmission between the first transmission member 31 and the second transmission member 32.
[0045] Compared with the prior art, in the electric screwdriver 1 of the embodiment of the present application, the force detection component 50 is respectively connected to the shell 10 and the transmission structure 30, so that the force detection component 50 can detect the rotational torque of the position in the transmission structure 30, and can transmit the detected torque data to the control board 70 inside the screwdriver in real time, so as to realize the torque closed-loop control of the electric screwdriver 1 in the original current control at the same time, thereby achieving more rapid and accurate control and adjustment of the output torque.
[0046] The above disclosure is only a preferred example of the present application, and its purpose is to facilitate the understanding and implementation of those skilled in the art. However, it cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made within the scope recorded in the present application still fall within the scope covered by the present application.
Claims
1. An electric screwdriver, characterized in that: The electric screwdriver includes a housing, a rotary driver, a transmission structure, an output shaft and a force detection component; The rotary driver, transmission structure and force detection assembly are all arranged in the housing; The housing is provided with a through hole, the output shaft passes through the housing through the through hole, one end of the output shaft located outside the housing is detachably connected to a batch nozzle, and the other end of the output shaft located inside the housing is connected to the transmission structure; The force detection assembly is respectively connected to the housing and the transmission structure; The output end of the rotary driver is connected to the transmission structure, and the rotary driver drives the transmission structure and drives the output shaft to rotate through the transmission structure.
2. The electric screwdriver according to claim 1, characterized in that: The transmission structure includes a reduction gear arranged between the rotary driver and the output shaft, and the force detection component is arranged between the reduction gear and the output shaft along a power transmission path of the transmission structure.
3. The electric screwdriver according to claim 2, characterized in that: The transmission structure also includes a first transmission member, one end of which is connected to the reduction device, and the other end of which is connected to the output shaft. The reduction device can drive the output shaft to rotate through the first transmission member, and the force detection component is arranged between the first transmission member and the output shaft along the power transmission path of the transmission structure.
4. The electric screwdriver according to claim 3, characterized in that: The transmission structure also includes a second transmission member, one end of which is connected to the first transmission member, and the other end of the second transmission member is connected to the output shaft. The force detection component is arranged between the second transmission member and the output shaft along the power transmission path of the transmission structure.
5. The electric screwdriver according to claim 4, characterized in that: The force detection component is connected to the second transmission member.
6. The electric screwdriver according to claim 5, characterized in that: The force detection assembly includes a fixing member and a strain detection member. The fixing member is fixedly connected to the housing. The strain detection member is arranged on the fixing member and abuts against the second transmission member.
7. The electric screwdriver according to claim 6, characterized in that The fixing member has a through hole, the second transmission member is inserted into the through hole, the fixing member is provided with a mounting hole connected to the through hole, the strain detection member is arranged in the mounting hole, and extends into the through hole to abut against the second transmission member.
8. The electric screwdriver according to claim 7, characterized in that: One end of the fixing member close to the through hole is fixedly connected to the housing, and one end of the fixing member away from the through hole is fixedly connected to the outer shell of the reduction gear.
9. The electric screwdriver according to claim 7, characterized in that: A plurality of the mounting holes are provided around the second transmission member, and the strain detection member is provided in all the mounting holes.
10. The electric screwdriver according to claim 9, characterized in that: The first transmission member is an external spline shaft, the second transmission member is an internal spline shaft, and the first transmission member is inserted into the second transmission member and is spline-connected to the second transmission member.