Electric tool
By introducing axial and radial limiting mechanisms into power tools, and utilizing the cooperation of locking components and elastic elements, the problem of head runout is solved, improving the stability and performance of the head.
Patent Information
- Application Number
- CN202422628159.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-10-30
AI Technical Summary
During the use of power tools, a gap may exist between the working head and the wall of the mounting hole, causing the working head to bounce and affecting the performance.
By employing axial and radial limiting mechanisms, and through the cooperation of locking components and elastic elements, the working head is locked in multiple directions, thus suppressing its runout.
It improves the stability of the working head, ensuring the working efficiency and quality of power tools.
Smart Images
Figure CN223573048U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of electric tools, in particular to an electric tool. BACKGROUND
[0002] During use, the electric tool often needs to replace different types of working heads to adapt to different working conditions. Generally, a limiting groove is arranged on the working head to cooperate with a locking device to realize locking of the working head.
[0003] However, when the working head is locked by the locking device, there is a gap between the other area of the working head except the limiting groove and the hole wall of the mounting hole of the working head. During use of the electric tool, the working head has a jumping phenomenon, which affects the use effect. SUMMARY
[0004] Therefore, the embodiments of the present application provide an electric tool to solve at least one problem in the background art.
[0005] In a first aspect, the embodiments of the present application provide an electric tool, comprising:
[0006] a tool body having an axial hole for accommodating a working head, a plurality of first radial holes and a plurality of second radial holes, the axial hole extending along a first direction, the plurality of first radial holes and the plurality of second radial holes being distributed circumferentially around an axis of the tool body, the first direction being the direction of the axis of the tool body;
[0007] an axial limiting mechanism comprising a locking assembly and a plurality of first limiting members, the locking assembly being sleeved on the tool body, the first limiting members being located in the first radial holes, the locking assembly being movable along the first direction and capable of restricting or allowing the first limiting members to move in the first radial holes to lock or unlock the working head in the first direction;
[0008] a radial limiting mechanism comprising a first elastic member and a plurality of second limiting members, the second limiting members being located in the second radial holes, when the working head is in a locked state, the first elastic member biases the second limiting members along a second direction and makes the second limiting members abut against the surface of the working head to lock the working head from the second direction, the second direction being perpendicular to the first direction.
[0009] In an optional implementation manner in combination with the first aspect of the present application, the locking assembly comprises:
[0010] a locking sleeve being movable along the first direction;
[0011] a second elastic member being located between the locking sleeve and the tool body;
[0012] The locking sleeve is movable along the first direction and is locked to the working head under the elastic force of the second elastic member.
[0013] In combination with the first aspect of the present application, in an optional implementation, the inner wall of the locking sleeve is provided with a limiting protrusion.
[0014] When the working head is in the locked state, the limiting protrusion abuts against the first limiting member, and the first limiting member matches a limiting groove provided on the working head.
[0015] In combination with the first aspect of the present application, in an optional implementation, the tool body is provided with a blocking member at a position corresponding to the distal end of the axial hole, and the second elastic member is located between the blocking member and the limiting protrusion.
[0016] When the locking sleeve moves along the first direction towards the distal end of the axial hole, the second elastic member is in a compressed deformation state.
[0017] In combination with the first aspect of the present application, in an optional implementation, the first elastic member is embedded in the tool body.
[0018] In combination with the first aspect of the present application, in an optional implementation, the first elastic member is a C-shaped elastic sheet.
[0019] In combination with the first aspect of the present application, in an optional implementation, the radial limiting mechanism includes a first radial limiting member and a second radial limiting member, and the first radial limiting member and the second radial limiting member are located on both sides of the axial limiting mechanism in the first direction.
[0020] In combination with the first aspect of the present application, in an optional implementation, the number of the first limiting members is two, and the two first limiting members respectively match two first radial holes, and the two first radial holes are uniformly distributed around the axis of the tool body in the circumferential direction.
[0021] In combination with the first aspect of the present application, in an optional implementation, the number of the second limiting members is three, and the three second limiting members respectively match three second radial holes, and the three second radial holes are uniformly distributed around the axis of the tool body in the circumferential direction.
[0022] In combination with the first aspect of the present application, in an optional implementation, the first limiting member and the second limiting member are both steel balls.
[0023] The power tool provided in this application embodiment utilizes a first elastic element to apply elastic force to a second limiting element from a second direction, causing the second limiting element to abut against the working head. This further locks the working head on the basis of the locking of the axial limiting component, which can suppress the radial runout of the working head and improve the stability of the bit during operation.
[0024] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description
[0025] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:
[0026] Figure 1 A side view of a power tool provided in an embodiment of this application;
[0027] Figure 2 for Figure 1 A partial structural schematic diagram of the cross-sectional view at point BB;
[0028] Figure 3 This is a partial exploded view of the structure of the power tool provided in the embodiments of this application;
[0029] Figure 4 Another side view of the power tool provided in an embodiment of this application;
[0030] Figure 5 for Figure 4 A partial structural schematic diagram of the cross-sectional view at point CC;
[0031] Figure 6a for Figure 1 Sectional view at EE;
[0032] Figure 6b for Figure 1 Sectional view at point GG;
[0033] Figure 6c for Figure 1 A cross-sectional view of the middle JJ section.
[0034] Figure label:
[0035] 100. Power tools;
[0036] 10. Tool body; 110. Axial hole; 120. First radial hole; 130. Second radial hole; 140. Blocking element;
[0037] 20, axial limiting mechanism; 210, locking assembly; 211, locking sleeve; 2111, limiting protrusion; 212, second elastic member; 220, first limiting member;
[0038] 30, radial limiting mechanism; 3a, first radial limiting member; 3b, second radial limiting member; 310, first elastic member; 320, second limiting member;
[0039] 40, output shaft;
[0040] 50, chuck; 510, limiting groove; 60, housing. DETAILED DESCRIPTION
[0041] In order to make the technical solutions and beneficial effects of the present application more obvious and easy to understand, the following will be described in detail by listing specific embodiments. The drawings are not necessarily drawn to scale, and local features can be enlarged or reduced to more clearly show the details of local features; unless otherwise defined, the technical and scientific terms used herein have the same meaning as the technical and scientific terms in the technical field to which the present application belongs.
[0042] In the description of the present application, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of the simplified description of the present application, and do not indicate that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, that is, cannot be understood as limiting the present application.
[0043] In the present application, the terms "first" and "second" are used only for the purpose of clear description, and cannot be understood as the relative importance of the indicated features or the number of indicated technical features. Therefore, the features defined with "first" and "second" can explicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc.; the meaning of "several" is at least one, such as one, two, three, etc.; except for explicit specific limitations.
[0044] In the present application, unless specifically defined otherwise, the terms "mount", "connect", "connection", "fix", "set" and the like should be construed in a broad sense. For example, "connection" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through intermediate medium, or interaction between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0045] In the present application, unless specifically defined otherwise, the first feature "on", "over", "above" and "top" of the second feature, "under", "below", "under" or "under" can be direct contact between the first feature and the second feature, or indirect contact between the first feature and the second feature through intermediate medium. Moreover, the first feature "over", "above" and "top" of the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than the horizontal height of the second feature. The first feature "under", "below" and "under" of the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than the horizontal height of the second feature.
[0046] The electric tool 100 provided by the embodiment of the present application can be an electric screwdriver, an electric drill, an electric wrench, etc. The working head is not limited to the bit 50, but can also be a drill bit, etc.
[0047] As shown in Figures 1 to 3 , the motor (not shown in the figure) in the electric tool 100 drives the output shaft 40 to output torque, the other end of the output shaft 40 is connected to the tool body 10 and can drive the tool body 10 to rotate, the motor, the output shaft 40 and the tool body 10 are all installed in the shell 60, the bit 50 is detachably inserted into the axial hole 110 of the tool body 10, and the output shaft 40 outputs torque and drives the bit 50 to rotate with the tool body 10 under the driving force of the motor, so as to tighten or loosen the screw nut.
[0048] Specifically, as shown in Figure 2 and Figure 3 , the tool body 10 has an axial hole 110 for accommodating the working head and a plurality of first radial holes 120, the axial hole 110 extends along a first direction, i.e. along the arrow s1 direction shown in Figure 2 , and the plurality of first radial holes 120 are distributed circumferentially around the axis of the tool body 10, and the first direction is the axis direction of the tool body 10.
[0049] The electric tool 100 further comprises an axial limiting mechanism 20, the axial limiting mechanism 20 comprises a locking assembly 210 and a plurality of first limiting members 220, the locking assembly 210 is sleeved on the tool body 10, and the first limiting members 220 are located in the first radial hole 120; the locking assembly 210 is movable in a first direction and can restrict or allow the first limiting members 220 to move in the first radial hole 120, so as to lock or unlock the working head in the first direction.
[0050] It can be understood that the movement of the locking assembly 210 in the first direction can restrict or allow the first limiting members 220 to move in a second direction in the first radial hole 120 and match the limiting groove 510 on the working head, the second direction is the radial direction of the tool body 10, and the first direction is perpendicular to the second direction, so as to realize the radial and axial locking of the working head. Correspondingly, the movement of the locking assembly 210 in the first direction can also make the first limiting members 220 move out of the limiting groove 510, so as to unlock the working head.
[0051] As shown in Figure 2 , although the axial limiting mechanism 20 can realize the radial and axial locking of the chuck 50, there is a gap between the chuck 50 and the locking assembly 210 in the second direction, and the chuck 50 jumps during the working process of the electric driver, which affects the use effect.
[0052] Based on this, the electric tool 100 provided by the embodiment of the application abuts against the surface of the chuck 50 in the second direction by using the radial limiting mechanism 30, so as to greatly reduce the jumping phenomenon of the chuck 50, and further ensure the working efficiency and working quality of the electric driver and improve the operation experience of the user.
[0053] Specifically, as shown in Figure 3 , Figure 4 and Figure 5 , the tool body 10 further comprises a plurality of second radial holes 130, and the plurality of second radial holes 130 are distributed circumferentially around the axis of the tool body 10.
[0054] The radial limiting mechanism 30 comprises a first elastic member 310 and a plurality of second limiting members 320, and the second limiting members 320 are located in the second radial holes 130; when the chuck 50 is inserted into the axial hole 110 and is in a locked state, the first elastic member 310 biases the second limiting members 320 in the second direction and makes the second limiting members 320 abut against the surface of the chuck 50, so as to further lock the working head in the second direction.
[0055] It can be understood that when the chuck 50 is in the locked state, the first elastic member 310 exerts an elastic force on the second limiting members 320 in the second direction, i.e., the radial direction of the tool body 10, and transmits the elastic force to the chuck 50, so as to inhibit the chuck 50 from jumping in the radial direction and improve the stability of the chuck 50 during the working process.
[0056] Figure 5 The diagram shows that the axial limiting mechanism 20 in the first direction is provided with a first elastic element 310 and a second limiting element 320 on both sides to further suppress the radial jump of the bit 50 and further improve the stability of the bit 50 during operation.
[0057] Specifically, the radial limiting mechanism 30 includes a first radial limiting member 3a and a second radial limiting member 3b with identical structures, which are located on opposite sides of the axial limiting mechanism 20 in a first direction. Furthermore, the distance between the first radial limiting member 3a and the axial limiting mechanism 20 is equal to the distance between the second radial limiting member 3b and the axial limiting mechanism 20, to ensure uniform force distribution on the bit 50 during operation, thereby improving the working stability of the bit 50.
[0058] Figure 3 The first elastic element 310 is shown to be a C-shaped spring sheet. The C-shaped spring sheet occupies little space and has high elasticity, which can ensure the elastic force acting on the second limiting element 320, and thus ensure the force acting on the bit 50.
[0059] Figure 5 The diagram shows a first elastic element 310 embedded in the outer wall of the tool body 10. The first elastic element 310 being embedded in the outer wall of the tool body 10 can prevent it from moving in the first direction, thereby enabling the first elastic element 310 to accurately abut against the second limiting element 320.
[0060] Preferably, both the first limiting member 220 and the second limiting member 320 are steel balls. Steel balls are durable and can reduce operator fatigue.
[0061] In an alternative embodiment, such as Figure 2 and Figure 3 As shown, the locking assembly 210 includes a locking sleeve 211 and a second elastic member 212. The locking sleeve 211 is fitted onto the tool body 10 and can move along the first direction. The second elastic member 212 is fitted onto the tool body 10 and is located between the locking sleeve 211 and the tool body 10.
[0062] Figure 2 The image shows the bit 50 in a locked state. When it is necessary to remove the bit 50 from the tool body 10, the operator applies force to the locking sleeve 211, causing the locking sleeve 211 to move in the first direction toward the distal end of the axial hole 110. Figure 2 As shown by arrow s2, the locking sleeve 211 moves and then disengages from the first limiting member 220, thereby disengaging the first limiting member 220 from the limiting groove 510 of the bit 50, thus unlocking the bit 50 and allowing it to be removed from the tool body 10.
[0063] The operator releases the force applied to the locking sleeve 211, and the locking sleeve 211 moves back to its original position under the action of the second elastic element 212 overcoming the elastic force.
[0064] When another bit 50 needs to be installed, the operator needs to apply force to the locking sleeve 211 and make the locking sleeve 211 move along... Figure 2 As shown by arrow s2, the action is moved and maintained. After the bit 50 is inserted into the axial hole 110, and the locking sleeve 211 is able to move back to its original position under the action of the second elastic member 212 overcoming the elastic force, the surface bit 50 is installed in place, that is, the first limiting member 220 matches the limiting groove 510.
[0065] Furthermore, such as Figure 2 As shown, the inner wall of the locking sleeve 211 is provided with a limiting protrusion 2111. When the bit 50 is in the locked state, the limiting protrusion 2111 abuts against the first limiting member 220, and the first limiting member 220 matches the limiting groove 510 on the bit 50.
[0066] In an alternative embodiment, such as Figure 2 and Figure 5 As shown, a blocking member 140 is provided at the distal end of the tool body 10 corresponding to the axial hole 110. The blocking member 140 is used to block the second elastic member 212. The two ends of the second elastic member 212 are respectively connected to the limiting protrusion 2111 and the blocking member 140. When the locking sleeve 211 moves along the... Figure 2 When the movement is directed in the direction of arrow s2 shown, the second elastic element 212 is compressed and deformed. The locking sleeve 211 can move to its initial position under the action of the second elastic element 212 overcoming the elastic force. Preferably, the blocking element 140 has a C-shaped structure and is embedded in the outer wall of the tool body 10.
[0067] In an alternative embodiment, such as Figure 1 , Figure 6a and Figure 6c As shown, there are three second limiting members 320, each matching one of the three second radial holes 130. The three second radial holes 130 are evenly distributed circumferentially around the axis of the tool body 10. The number of second limiting members 320 matches the number of second radial holes 130. The number of second limiting members 320 is not limited to three; it can also be two, four, five, etc., depending on factors such as the size of the tool body 10.
[0068] In an alternative embodiment, such as Figure 1 and Figure 6bAs shown, the number of the first limit members 220 is two, and the two first limit members 220 are respectively matched with two first radial holes 120, and the two first radial holes 120 are evenly distributed around the axis of the tool body 10. The number of the first limit members 220 is matched with the number of the first radial holes 120, and of course, the number of the first limit members 220 is not limited to two, but can also be three, four, five, etc., which can be set according to the size of the tool body 10 and other factors.
[0069] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations encompassed by the claims. Various modifications and alterations can also be made on the basis of the above embodiments without departing from the scope of the present disclosure. Similarly, any combination of the technical features of the above embodiments can also be made to form additional embodiments of the present application that can not have been explicitly described. Therefore, the above embodiments only express several implementation manners of the present application and do not limit the protection scope of the patent of the present application.
Claims
1. A power tool, characterized in that, include: The tool body (10) has an axial hole (110) for receiving a working head, a plurality of first radial holes (120) and a plurality of second radial holes (130) communicating with the axial hole (110), the axial hole (110) extending along a first direction, and the plurality of first radial holes (120) and second radial holes (130) being circumferentially distributed around the axis of the tool body (10), the first direction being the axial direction of the tool body (10); An axial limiting mechanism (20) includes a locking assembly (210) and a plurality of first limiting members (220). The locking assembly (210) is fitted onto the tool body (10). The first limiting members (220) are located within the first radial hole (120). The locking assembly (210) moves along the first direction and is able to restrict or allow the first limiting members (220) to move within the first radial hole (120) to lock or unlock the working head in the first direction. The power tool further includes a radial limiting mechanism (30), which includes a first elastic element (310) and a plurality of second limiting elements (320). The second limiting elements (320) are located in the second radial hole (130). When the working head is in a locked state, the first elastic element (310) biases the second limiting element (320) along a second direction and causes the second limiting element (320) to press against the surface of the working head to clamp the working head from a second direction, the second direction being perpendicular to the first direction.
2. The power tool according to claim 1, characterized in that, The locking assembly (210) includes: A locking sleeve (211) is fitted onto the tool body (10) and can move between the locked working head position and the unlocked working head position along the first direction; The second elastic element (212) is located between the locking sleeve (211) and the tool body (10); The locking sleeve (211) is held in the locked working head position by the elastic force of the second elastic member (212).
3. The power tool according to claim 2, characterized in that, The inner wall of the locking sleeve (211) is provided with a limiting protrusion (2111); When the working head is in the locked state, the locking sleeve (211) is held in the locked working head position, the limiting protrusion (2111) abuts against the first limiting member (220), and the first limiting member (220) matches the limiting groove provided on the working head.
4. The power tool according to claim 3, characterized in that, The tool body (10) is provided with a blocking member (140) at the far end of the axial hole (110), and the second elastic member (212) is located between the blocking member (140) and the limiting protrusion (2111). When the locking sleeve (211) moves toward the distal end of the axial hole (110) along the first direction, the second elastic element (212) is in a state of compression deformation.
5. The power tool according to claim 1, characterized in that, The first elastic element (310) is embedded in the tool body (10).
6. The power tool according to claim 1, characterized in that, The first elastic element (310) is a C-shaped spring sheet.
7. The power tool according to claim 1, characterized in that, The radial limiting mechanism (30) includes a first radial limiting member (3a) and a second radial limiting member (3b), which are located on both sides of the axial limiting mechanism (20) in the first direction.
8. The power tool according to claim 1, characterized in that, There are two first limiting members (220), and the two first limiting members (220) are respectively matched with the two first radial holes (120). The two first radial holes (120) are evenly distributed around the axis of the tool body (10).
9. The power tool according to claim 1, characterized in that, The number of the second limiting member (320) is three, and the three second limiting members (320) are respectively matched with the three second radial holes (130). The three second radial holes (130) are evenly distributed around the axis of the tool body (10).
10. The power tool according to claim 1, characterized in that, Both the first limiting member (220) and the second limiting member (320) are steel balls.