Electric screwdriver
By adopting a smooth surface design torque adjustment structure in the electric screwdriver, the rotation difficulty problem caused by torque spring compression is solved, and the convenience and smoothness of torque adjustment are achieved.
Patent Information
- Application Number
- CN202422300540.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-09-19
AI Technical Summary
In the torque adjustment mechanism of existing electric screwdrivers, the torque spring continuously compresses will increase the difficulty of rotation of the handle cap, resulting in difficulty in torque adjustment.
The torque adjustment structure including a first component, a second component and a torque spring is adopted. The first component pushes the second component to move in the axial direction of the main shaft, and the torque spring abuts the second component, and the abutment surface of the second component and the first component is a smooth surface, reducing friction and achieving smooth torque adjustment.
It improves the torque adjustment convenience of the electric screwdriver, reduces the resistance during torque adjustment, and improves the smoothness of the adjustment.
Smart Images
Figure CN223071278U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of screwdrivers, and particularly relates to an electric screwdriver. Background Art
[0002] In the related art, an electric screwdriver drives a tool bit to rotate through a driving device to tighten or loosen a screw. Compared with a manual screwdriver, the electric screwdriver has a torque adjustment structure for adjusting and limiting torque. Among them, the torque adjustment mechanism includes a torque spring. One end of the torque spring abuts against a handle cap. By rotating the handle cap, the torque spring is compressed or extended to achieve the function of torque adjustment. However, when the torque spring is continuously compressed, the acting force of the torque spring on the handle cap will increase, increasing the difficulty of rotating the handle cap and resulting in the problem of difficult torque adjustment. Summary of the Utility Model
[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides an electric screwdriver, which can improve the convenience of torque adjustment of the electric screwdriver.
[0004] The electric screwdriver according to an embodiment of the utility model includes:
[0005] A hollow housing;
[0006] A clamping part, at least partially arranged in the housing, and the clamping part has a clamping space;
[0007] A main shaft, arranged in the clamping space;
[0008] A torque adjustment structure, including a first component, a second component and a torque spring. The first component and the second component are both sleeved on the outer periphery of the clamping part and are arranged in sequence along the axial direction of the main shaft. Among them, the first component is threadedly connected to the clamping part, and the first component is used to push the second component to move along the axial direction of the main shaft. One end of the torque spring abuts against the side of the second component away from the first component, and the other end of the torque spring abuts against the housing.
[0009] For the electric screwdriver according to an embodiment of the utility model, the abutting surface between the second component and the first component is a smooth surface.
[0010] For the electric screwdriver according to an embodiment of the utility model, a positioning part is arranged on the side of the second component close to the torque spring. The positioning part at least partially extends along the axial direction of the main shaft towards the side of the torque spring, and the positioning part is located inside the torque spring.
[0011] The electric screwdriver according to an embodiment of the present utility model further includes a handle cap, the handle cap is connected to the housing, and the inner wall of the handle cap is sleeved on the outer periphery of the torque adjustment structure, and the handle cap is used to drive the torque adjustment structure to rotate.
[0012] For the electric screwdriver according to an embodiment of the present utility model, the handle cap is snap-connected to the housing, and the handle cap can rotate circumferentially relative to the housing.
[0013] For the electric screwdriver according to an embodiment of the present utility model, protrusions are provided on the outer periphery of the handle cap.
[0014] For the electric screwdriver according to an embodiment of the present utility model, the protrusions are arranged at intervals along the axial direction of the handle cap.
[0015] The electric screwdriver according to an embodiment of the present utility model further includes a driving device, and the driving device is used to drive the main shaft to rotate.
[0016] The electric screwdriver according to an embodiment of the present utility model further includes a speed reduction mechanism, and the speed reduction mechanism connects the output end of the driving device and the main shaft.
[0017] The electric screwdriver according to an embodiment of the present utility model has at least the following beneficial effects: In the embodiment of the present application, the torque spring abuts against one side surface of the second component, and the other side surface of the second component abuts against the first component. When adjusting the torque of the electric screwdriver, by rotating the first component, the second component can be pushed to move along the axial direction of the main shaft. During the process of adjusting the torque, the second component is arranged between the first component and the torque spring, and the first component can rotate relative to the second component. In this way, when the spring is compressed, the frictional force of the torque spring on the second component does not directly act on the first component, thereby reducing the resistance during torque adjustment, facilitating the rotation of the first component, and being conducive to improving the smoothness of torque adjustment. In this way, the smoothness of torque adjustment can be improved.
[0018] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The following further describes the present utility model in conjunction with the drawings and embodiments, where:
[0020] Figure 1 It is a schematic diagram of the overall structure of an electric screwdriver according to an embodiment of the present utility model;
[0021] Figure 2 It is a schematic diagram of the structure of the electric screwdriver according to an embodiment of the present utility model from another perspective;
[0022] Figure 3 Structural schematic diagram of another perspective of an electric screwdriver according to an embodiment of the present utility model;
[0023] Figure 4 Cross-sectional structural schematic diagram of an electric screwdriver according to an embodiment of the present utility model;
[0024] Figure 5 Partial structural schematic diagram of an electric screwdriver according to an embodiment of the present utility model.
[0025] Reference numerals:
[0026] 100, housing; 110, handle; 120, switch;
[0027] 200, clamping part;
[0028] 300, main shaft;
[0029] 400, handle cap; 410, protrusion;
[0030] 510, first component; 520, second component; 521, positioning part; 530, torque spring;
[0031] 610, motor; 620, reduction mechanism. Detailed implementation manners
[0032] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.
[0033] In the description of the present utility model, it should be understood that for the orientation description, such as the upper, lower, front, rear, left, right, etc., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.
[0034] In the description of the present utility model, the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, exceeding, etc. are understood as not including the present number, and above, below, within, etc. are understood as including the present number. If the first and second are described only for the purpose of distinguishing technical features, they should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.
[0035] In the description of the present utility model, unless otherwise clearly defined, terms such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.
[0036] In the description of the present utility model, the description referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.
[0037] See Figures 1 to 5 , the embodiment of the present application discloses an electric screwdriver, which includes a housing 100, a clamping portion 200, a main shaft 300, and a torque adjustment structure.
[0038] Specifically, at least a part of the clamping portion 200 is disposed inside the housing 100. The clamping portion 200 has a clamping space, and the main shaft 300 is disposed inside the clamping space; the torque adjustment structure includes a first component 510, a second component 520, and a torque spring 530. Both the first component 510 and the second component 520 are sleeved on the outer periphery of the clamping portion 200 and are sequentially arranged along the axial direction of the main shaft 300. Among them, the first component 510 is threadedly connected to the clamping portion 200, and the first component 510 is used to push the second component 520 to move along the axial direction of the main shaft 300. One end of the torque spring 530 abuts against the side of the second component 520 away from the first component 510, and the other end of the torque spring 530 abuts against the housing 100.
[0039] In the embodiment of the present application, the torque spring 530 abuts against one side surface of the second component 520, and the other side surface of the second component 520 abuts against the first component 510. When adjusting the torque of the electric screwdriver, by rotating the first component 510, the second component 520 can be pushed to move along the axial direction of the main shaft 300. During the process of adjusting the torque, the second component 520 is disposed between the first component 510 and the torque spring 530, and the first component 510 can rotate relative to the second component 520. Thus, when the spring is compressed, the frictional force of the torque spring 530 on the second component 520 does not directly act on the first component 510, which can facilitate the rotation of the first component 510, thereby reducing the resistance during torque adjustment, facilitating the smoothness of torque adjustment, and thus improving the convenience of torque adjustment.
[0040] In some embodiments of the present application, the abutting surface of the second component 520 and the first component 510 is a smooth surface. In this way, the friction coefficient between the first component 510 and the second component 520 can be reduced, and when the acting force of the torque spring 530 on the second component 520 increases, it is also convenient for the first component 510 and the second component 520 to rotate relative to each other.
[0041] It should be understood that since the second component 520 is in direct contact with the torque spring 530, when the acting force of the torque spring 530 on the second component 520 is relatively large, the second component 520 and the torque spring 530 can be in a relatively stationary state, while the first component 510 and the second component 520 can rotate relative to each other, that is, the first component 510 rotates relative to the clamping part. Since the first component 510 is threadedly connected to the clamping part, in this way, the relative position of the first component 510 in the clamping part can be changed, so that the torque spring 530 is compressed or extended.
[0042] It should be noted that the end face of the first component 510 close to the second component 520 is denoted as the first surface, and the end face of the second component 520 close to the first component 510 is denoted as the second surface, and the first surface abuts against the second surface. Among them, the first surface can be a flat surface, a curved surface, a stepped surface or other combined end faces; at the same time, the second surface matches the first surface.
[0043] In some embodiments of the present application, refer to Figure 4 , a positioning portion 521 is provided on one side of the second component 520 close to the torque spring 530. The positioning portion 521 at least partially extends along the axial direction of the main shaft 300 towards the side of the torque spring 530, and the positioning portion 521 is located inside the torque spring 530. The positioning portion 521 can limit the torque spring 530 to the outer periphery of the positioning portion 521, which helps to ensure the concentricity of the torque spring 530 and the main shaft 300, so as to ensure uniform force at each position in the circumferential direction of the second component 520, which is beneficial to further improving the smoothness of torque adjustment.
[0044] In some embodiments of the present application, refer to Figures 1 to 5 , the electric screwdriver further includes a handle cap 400. The handle cap 400 is connected to the housing 100, and the inner wall of the handle cap 400 is sleeved on the outer periphery of the torque adjustment structure. The handle cap 400 is used to drive the torque adjustment structure to rotate.
[0045] Furthermore, the handle cap 400 is snap-connected to the housing 100, and the handle cap 400 can rotate circumferentially relative to the housing 100.
[0046] In a possible implementation, a clamping groove is provided on the inner wall of the housing 100. One end of the handle cap 400 connected to the housing 100 is stepped and provided with a clamping structure that cooperates with the aforementioned clamping groove. Among them, the clamping structure can rotate circumferentially within the clamping groove. Among them, the handle cap 400 can rotate circumferentially along the main shaft 300, but cannot move axially along the main shaft 300.
[0047] In some other implementations, the handle cap 400 can also be configured to be rotatable relative to the housing 100 and capable of moving axially along the main shaft 300. For example, the housing 100 is threadedly connected to the handle cap 400.
[0048] In some embodiments of the present application, a protrusion 410 is provided on the outer periphery of the handle cap 400. In this way, the friction of the handle 110 sleeve can be increased, facilitating the rotation of the handle cap 400.
[0049] Further, referring to Figure 1 and Figure 2 , the protrusions 410 are provided at intervals along the axial direction of the handle cap 400. Specifically, there are multiple protrusions 410, and the multiple protrusions 410 are provided at intervals along the circumferential direction of the handle cap 400 on the outer wall of the handle cap 400. In this way, the friction of the handle cap 400 can be increased, facilitating the rotation of the handle cap 400.
[0050] In some embodiments of the present application, referring to Figure 4 , the electric screwdriver further includes a driving device for driving the main shaft 300 to rotate. In practical applications, the driving device can specifically be a motor 610.
[0051] In some embodiments of the present application, the electric screwdriver further includes a reduction mechanism 620, and the reduction mechanism 620 connects the output end of the driving device and the main shaft 300. Specifically, the driving device includes a motor 610, the input end of the reduction mechanism 620 is connected to the output end of the motor 610, the output end of the reduction mechanism 620 is connected to the clamping part through a transmission structure, the motor 610 drives the clamping part to rotate through the reduction mechanism 620, and the clamping part drives the main shaft 300 to rotate.
[0052] In one implementation, the output end of the reduction mechanism 620 is connected to the clamping part 200, and the reduction mechanism 620 drives the clamping part 200 to rotate to drive the main shaft 300 to rotate.
[0053] In this embodiment, the main shaft 300 is connected with a tool bit for cooperating with a screw, and the main shaft 300 drives the tool bit to rotate to tighten or loosen the screw.
[0054] In this embodiment, referring to Figure 1 and Figure 2, the housing 100 is provided with a handle 110 and a switch 120. The handle 110 is used to facilitate the user to hold the electric screwdriver, and the switch 120 is used to control the rotation of the electric screwdriver.
[0055] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the spirit of the present invention. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.
Claims
1. An electric screwdriver, characterized in that, Comprising: A hollow housing; A clamping portion, at least partially disposed within the housing, the clamping portion having a clamping space; A main shaft, disposed within the clamping space; A torque adjustment structure, including a first component, a second component, and a torque spring, the first component and the second component are both sleeved on the outer periphery of the clamping portion and are sequentially arranged along the axial direction of the main shaft. Among them, the first component is threadedly connected to the clamping portion, the first component is used to push the second component to move along the axial direction of the main shaft, one end of the torque spring abuts against the side of the second component away from the first component, and the other end of the torque spring abuts against the housing.
2. The electric screwdriver according to claim 1, characterized in that, The abutting surface of the second component and the first component is a smooth surface.
3. The electric screwdriver according to claim 1 or 2, characterized in that, A positioning portion is provided on the side of the second component close to the torque spring, the positioning portion at least partially extends along the axial direction of the main shaft towards the side of the torque spring, and the positioning portion is located within the torque spring.
4. The electric screwdriver according to claim 3, characterized in that, It further includes a handle cap, the handle cap is connected to the housing, and the inner wall of the handle cap is sleeved on the outer periphery of the torque adjustment structure, and the handle cap is used to drive the torque adjustment structure to rotate.
5. The electric screwdriver according to claim 4, wherein The handle cap is snap-connected to the housing, and the handle cap can rotate circumferentially relative to the housing.
6. The electric screwdriver according to claim 5, characterized in that, A protrusion is provided on the outer periphery of the handle cap.
7. The electric screwdriver according to claim 6, characterized in that, The protrusions are arranged at intervals along the axial direction of the handle cap.
8. The electric screwdriver according to claim 1, wherein, It further includes a driving device, the driving device is used to drive the main shaft to rotate.
9. The electric screwdriver according to claim 8, characterized in that, It further includes a reduction mechanism, the reduction mechanism connects the output end of the driving device and the main shaft.