Quick change structure of multifunctional tool
By designing a quick change structure in a multi-function tool, and using the cooperation of the elastic chuck and the output shaft boss, the efficiency of replacing the saw blade and triangle sand disk is achieved, solving the problems of low replacement efficiency of traditional tools and easy loss of hex wrench.
Patent Information
- Application Number
- CN202421332204.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-06-12
AI Technical Summary
Traditional multi-functional tools are not efficient when replacing saw blades and triangular sand disks, and the hex wrench is easily lost and cannot be replaced.
设计了一种多功能工具的快换结构，包括输出轴、锁紧轴控制装置、弹性组件和可沿输出轴轴向移动的锁紧轴和弹性夹头。通过凸轮驱动压块和锁紧轴滑动，利用弹性夹头和输出轴凸台的配合，实现弹性夹头的张开和闭合，方便更换刀具。
Improve the efficiency of tool replacement, avoid the problem of loss of hex wrench, and the replacement process is smooth and without lag.
Smart Images
Figure CN222857906U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a quick-change structure of a multifunctional tool. Background Art
[0002] Various electric tools emerge in an endless stream and have penetrated into all walks of life in all directions, such as cutting, grinding, pruning, sawing, drilling, etc. The emergence of multi-functional tools allows users to replace multiple accessories according to their needs by purchasing only one multi-functional tool. Multi-functional tools can clamp woodworking saw blades, metal saw blades, triangular sanding discs, etc. Clamping woodworking saw blades or metal saw blades can be used for cutting on wood boards or metal materials such as aluminum alloys. Triangular sanding discs with sandpaper can be used for sanding and polishing on wood boards, gypsum boards or walls.
[0003] In a traditional multi-functional tool, the saw blade and the triangular sanding disc are installed on the output shaft of the multi-functional tool. There are small bosses evenly distributed along the circumference on the output end face of the output shaft. The small bosses are used to position the saw blade and the triangular sanding disc. There are also threaded holes on the output shaft. The saw blade and the triangular sanding disc can be fixed by screwing the screws with a hexagonal wrench. However, when replacing the saw blade and the triangular sanding disc, the screws need to be completely removed, and the triangular sanding disc or the saw blade needs to be put on before tightening the screws with a hexagonal wrench. Therefore, the replacement of the triangular sanding disc and the saw blade is not efficient, and the hexagonal wrench is easy to lose and cannot be replaced once lost. Utility Model Content
[0004] The purpose of the utility model is to provide a quick-change structure of a multifunctional tool to solve the technical problems mentioned in the above background technology.
[0005] The technical solution to achieve the purpose of the utility model is: a quick-change structure of a multifunctional tool, including an output shaft, wherein a locking shaft control device, an elastic component, a locking shaft and an elastic collet that can move axially along the output shaft are arranged in the output shaft, and the elastic collet is sleeved on the locking shaft, and the locking shaft control device drives the locking shaft to slide axially along the output shaft, and the locking shaft drives the elastic collet to slide axially along the output shaft through the elastic component; a collet boss is arranged on the outer side wall of the elastic collet, and an output shaft boss that cooperates with the collet boss is arranged on the inner side wall of the output shaft, and when the elastic collet slides axially, the opening and closing of the elastic collet is controlled by the cooperation between the collet boss and the output shaft boss.
[0006] Furthermore, a chuck boss inclined surface is arranged on the chuck boss, and the outer diameter of the inclined surface portion gradually decreases from top to bottom, and a matching output shaft boss inclined surface is arranged on the output shaft boss.
[0007] Furthermore, the locking shaft control device includes a pressure block and a cam. The pressure block is arranged in the output shaft and located above the elastic component. The cam is arranged above the pressure block. The rotation of the cam is controlled to drive the pressure block and the locking shaft to slide axially along the output shaft.
[0008] Furthermore, the elastic component includes a locking shaft retaining ring, a locking shaft return spring, an elastic collet return spring and a fixed retaining ring, the fixed retaining ring is fixed in the output shaft, the locking shaft retaining ring is fixed to the upper end of the locking shaft and is located above the fixed retaining ring, the locking shaft return spring and the elastic collet return spring are both sleeved on the locking shaft, the locking shaft return spring is located on the outside of the elastic collet return spring, and its two ends are respectively abutted against the locking shaft retaining ring and the fixed retaining ring, the elastic collet return spring passes through the fixed retaining ring, and its two ends are respectively abutted against the locking shaft retaining ring and the elastic collet.
[0009] Furthermore, the output shaft includes an upper output shaft and a lower output shaft, the upper end of the lower output shaft is arranged inside the lower end of the upper output shaft; the elastic chuck includes a chuck ring with an integral structure and an elastic claw arranged below the chuck ring, the chuck ring is sleeved on the locking shaft and located below the fixed retaining ring, and when the elastic chuck is closed, the lower end face of the chuck ring cooperates with the upper end face of the lower output shaft.
[0010] Furthermore, an elastic claw step is provided at the bottom of the elastic claw, and the elastic claw step is located below the lower output shaft. When the elastic clamp is opened, the outer diameter of the elastic claw step is larger than the inner diameter of the lower output shaft.
[0011] Furthermore, the bottom of the locking shaft is provided with a conical surface and a locking shaft step in sequence from top to bottom, the radius of the conical surface gradually increases from top to bottom, the outer diameter of the locking shaft step is larger than the outer diameter of the conical surface, and the conical surface and the locking shaft step cooperate with the elastic claw step.
[0012] Furthermore, a sliding groove is symmetrically arranged on the inner side wall of the upper output shaft along the axial direction, and a clamping ring protrusion is symmetrically arranged on the outer ring of the clamping ring, and the clamping ring protrusion slides in the sliding groove.
[0013] Furthermore, a spiral cone surface is provided on the cam, and an inwardly concave cam clamp is provided at the bottom of the spiral cone surface. The pressure block includes an integrally arranged pressure block ring and a pressure block boss. The pressure block boss is arranged on the upper end surface of the pressure block ring and cooperates with the spiral cone surface on the cam; the outer ring of the pressure block ring is symmetrically provided with pressure block ring bosses, and the pressure block ring bosses slide in the sliding groove.
[0014] By adopting the above technical solution, the utility model has the following beneficial effects:
[0015] (1) The utility model cooperates the chuck boss of the elastic chuck with the output shaft boss. When the elastic chuck moves axially, when the chuck boss is opposite to the output shaft boss, the elastic chuck is closed. When the chuck boss is offset from the output shaft boss, the elastic chuck is opened. The axial movement of the elastic chuck can be controlled by rotating the cam. At the same time, the opening and closing of the elastic chuck can be controlled, which can facilitate the replacement of the tool and improve the replacement efficiency.
[0016] (2) The chuck boss of the utility model is provided with a chuck boss inclined surface, and the outer diameter of the inclined surface portion gradually decreases from top to bottom. The output shaft boss is provided with a matching output shaft boss inclined surface, so that the elastic chuck can move axially more smoothly, and the chuck boss will not be stuck by the output shaft boss, thereby preventing the chuck boss from moving axially.
[0017] (3) The arrangement of the elastic component of the utility model can make the locking shaft and the elastic clamp move axially at the same time and in the same direction when the pressure block moves axially.
[0018] (4) The bottom of the elastic claw of the utility model is provided with an elastic claw step. When the elastic chuck is opened, the elastic claw step cooperates with the lower output shaft to clamp the tool or saw blade.
[0019] (5) The bottom of the locking shaft of the utility model is provided with a conical surface and a locking shaft step. When the locking shaft is reset, the elastic collet is opened by the conical surface, and then the elastic claw step is clamped by the locking shaft step. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to specific embodiments and in conjunction with the accompanying drawings.
[0021] Figure 1 It is a cross-sectional view of the elastic clamp of the utility model when it is opened.
[0022] Figure 2 It is a cross-sectional view of the closed elastic clamp of the utility model.
[0023] Figure 3 This is a schematic diagram of the internal structure of the utility model without the output shaft.
[0024] Figure 4 It is a structural schematic diagram of the output shaft of the utility model.
[0025] The numbers in the accompanying drawings are: output shaft 1, output shaft boss 1-1, output shaft boss inclined surface 1-1-1, upper output shaft 1-2, sliding groove 1-2-1, lower output shaft 1-3, pressure block 2, pressure block ring 2-1, pressure block ring protrusion 2-1-1, pressure block boss 2-2, cam 3, spiral cone surface 3-1, cam clamp 3-2, elastic component 4, locking shaft retaining ring 4-1, locking shaft return spring 4-2, elastic chuck return spring 4-3, fixed retaining ring 4-4, locking shaft 5, conical surface 5-1, locking shaft step 5-2, elastic chuck 6, chuck boss 6-1, chuck boss inclined surface 6-1-1, chuck ring 6-2, chuck ring protrusion 6-2-1, elastic claw 6-3, elastic claw step 6-3-1. DETAILED DESCRIPTION
[0026] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0029] 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, further definition and explanation thereof is not required in subsequent drawings.
[0030] In the description of the embodiments of the present utility model, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present utility model 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 should not be understood as a limitation on the present utility model.
[0031] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly stipulated and limited, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the scope of protection of the utility model.
[0032] (Example 1)
[0033] See Figure 1-4 The quick-change structure of the multifunctional tool of this embodiment includes an output shaft 1, in which a locking shaft control device, an elastic component 4, a locking shaft 5 and an elastic chuck 6 which can move axially along the output shaft 1 are arranged. The elastic chuck 6 is sleeved on the locking shaft 5, and the pressure block 2 and the locking shaft 5 are driven to slide axially along the output shaft 1 by controlling the rotation of the cam 3. The locking shaft 5 drives the elastic chuck 6 to slide axially along the output shaft 1 through the elastic component 4; a chuck boss 6-1 is arranged on the outer wall of the elastic chuck 6, and an output shaft boss 1-1 cooperating with the chuck boss 6-1 is arranged on the inner wall of the output shaft 1. When the elastic chuck 6 slides axially, the opening and closing of the elastic chuck 6 are controlled by the cooperation between the chuck boss 6-1 and the output shaft boss 1-1. When the elastic chuck 6 moves axially, when the chuck boss 6-1 is opposite to the output shaft boss 1-1, the elastic chuck 6 is closed, and when the chuck boss 6-1 is offset from the output shaft boss 1-1, the elastic chuck 6 is opened. It is only necessary to rotate the cam 3 to control the axial movement of the elastic chuck 6 and control the opening and closing of the elastic chuck 6 at the same time, so that the tool can be replaced conveniently and the replacement efficiency is improved.
[0034] Specifically, a chuck boss inclined surface is provided on the chuck boss, and the outer diameter of the inclined surface part gradually decreases from top to bottom. A matching output shaft boss inclined surface 1-1-1 is provided on the output shaft boss 1-1, so that the elastic chuck can move axially more smoothly, and the chuck boss will not be stuck by the output shaft boss 1-1, thereby preventing the chuck boss from moving axially.
[0035] The locking shaft control device includes a pressure block 2 and a cam 3. The pressure block 2 is arranged in the output shaft 1 and is located above the elastic component 4. The cam 3 is arranged above the pressure block 2. The rotation of the cam 3 is controlled to drive the pressure block 2 and the locking shaft 5 to slide axially along the output shaft 1.
[0036] The elastic component 4 includes a locking shaft retaining ring 4-1, a locking shaft reset spring 4-2, an elastic clamp reset spring 4-3 and a fixed retaining ring 4-4. The fixed retaining ring 4-4 is fixed in the output shaft 1. The locking shaft retaining ring 4-1 is fixed to the upper end of the locking shaft 5 and is located above the fixed retaining ring 4-4. The locking shaft reset spring 4-2 and the elastic clamp reset spring 4-3 are both sleeved on the locking shaft. The locking shaft reset spring 4-2 is located on the outside of the elastic clamp reset spring 4-3, and its two ends are respectively abutted against the locking shaft retaining ring 4-1 and the fixed retaining ring 4-4. The elastic clamp reset spring 4-3 passes through the fixed retaining ring 4-4, and its two ends are respectively abutted against the locking shaft retaining ring 4-1 and the elastic clamp 6.
[0037] The output shaft 1 includes an upper output shaft 1-2 and a lower output shaft 1-3, and the upper end of the lower output shaft 1-3 is arranged inside the lower end of the upper output shaft 1-2; the elastic chuck 6 includes a chuck ring 6-2 with an integral structure and an elastic claw 6-3 arranged below the chuck ring 6-2, the chuck ring 6-2 is sleeved on the locking shaft 5 and is located below the fixed retaining ring 4-4, and when the elastic chuck 6 is closed, the lower end face of the chuck ring 6-2 cooperates with the upper end face of the lower output shaft 1-3.
[0038] A sliding groove 1-2-1 is symmetrically arranged on the inner side wall of the upper output shaft 1-2 along the axial direction, and a clamping ring protrusion 6-2-1 is symmetrically arranged on the outer ring of the clamping ring 6-2, and the clamping ring protrusion slides in the sliding groove 1-2-1.
[0039] A retaining ring groove is provided in the upper output shaft 1 - 2 , and a fixed retaining ring 4 - 4 is fixed in the retaining ring groove, which facilitates the fixation of the fixed retaining ring 4 - 4 .
[0040] An elastic claw step 6-3-1 is provided at the bottom of the elastic claw 6-3, and the elastic claw step 6-3-1 is located below the lower output shaft 1-3. When the elastic chuck 6 is opened, the outer diameter of the elastic claw step 6-3-1 is larger than the inner diameter of the lower output shaft 1-3.
[0041] The bottom of the locking shaft 5 is provided with a conical surface 5-1 and a locking shaft step 5-2 in sequence from top to bottom. The radius of the conical surface 5-1 gradually increases from top to bottom. The outer diameter of the locking shaft step 5-2 is larger than the outer diameter of the conical surface 5-1. The conical surface 5-1 and the locking shaft step 5-2 cooperate with the elastic claw step 6-3-1.
[0042] A spiral cone surface 3-1 is provided on the cam 3, and an inwardly concave cam clamping platform 32 is provided at the bottom of the spiral cone surface 3-1. The pressure block 2 includes an integral pressure block ring 2-1 and a pressure block boss 2-2. The pressure block boss 2-2 is provided on the upper end surface of the pressure block ring 2-1 and cooperates with the spiral cone surface 3-1 on the cam 3; the outer ring of the pressure block ring 2-1 is symmetrically provided with pressure block ring bosses 2-1-1, and the pressure block ring bosses 2-1-1 slide in the sliding groove 1-2-1.
[0043] A knob is arranged above the cam 3 , and the knob is fixedly connected to the cam 3 , and the cam 3 is rotated by rotating the knob.
[0044] The specific working method of this embodiment is as follows: when the tool or saw blade needs to be replaced, the knob is turned to rotate the cam 3, and the cam 3 cooperates with the pressure block boss 2-2 of the pressure block 2 through the spiral cone surface 3-1, so that the pressure block 2 is lowered, and the pressure block 2 lowers the locking shaft 5 through the locking shaft reset spring 4-2, and at the same time, the locking shaft 5 lowers the elastic chuck 6 through the elastic chuck reset spring 4-3, and the chuck boss 6-1 on the elastic chuck 6 is opposite to the output shaft boss 1-1, and the elastic chuck 6 is closed at this time. After the tool or saw blade is replaced, the knob is turned in the opposite direction, the locking shaft 5 is reset, and at the same time, the conical surface 5-1 of the locking shaft 5 and the locking shaft step 5-2 push the elastic chuck 6 to rise and reset, and the chuck boss 6-1 of the elastic chuck 6 is staggered with the output shaft boss 1-1, the elastic chuck 6 is opened, and the elastic claw step 6-3-1 of the elastic chuck 6 cooperates with the lower output shaft 1-3 to clamp the tool or saw blade.
[0045] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A quick-change structure for a multifunctional tool, characterized in that: The invention comprises an output shaft (1), wherein a locking shaft control device, an elastic component (4), a locking shaft (5) and an elastic chuck (6) which can move axially along the output shaft (1) are arranged in the output shaft (1); the elastic chuck (6) is sleeved on the locking shaft (5); the locking shaft control device drives the locking shaft (5) to slide axially along the output shaft (1); the locking shaft (5) drives the elastic chuck (6) to slide axially along the output shaft (1) through the elastic component (4); a chuck boss (6-1) is arranged on the outer side wall of the elastic chuck (6); an output shaft boss (1-1) which cooperates with the chuck boss (6-1) is arranged on the inner side wall of the output shaft (1); when the elastic chuck (6) slides axially, the opening and closing of the elastic chuck (6) is controlled by the cooperation between the chuck boss (6-1) and the output shaft boss (1-1).
2. A quick-change structure for a multifunctional tool according to claim 1, characterized in that: The chuck boss (6-1) is provided with a chuck boss inclined surface (6-1-1), the outer diameter of the inclined surface portion gradually decreases from top to bottom, and the output shaft boss (1-1) is provided with a matching output shaft boss inclined surface (1-1-1).
3. The quick-change structure of a multifunctional tool according to claim 1, characterized in that: The locking shaft control device comprises a pressure block (2) and a cam (3); the pressure block (2) is arranged inside the output shaft (1) and above the elastic component (4); the cam (3) is arranged above the pressure block (2); and the pressure block (2) and the locking shaft (5) are driven to slide axially along the output shaft (1) by controlling the rotation of the cam (3).
4. The quick-change structure of a multifunctional tool according to claim 3, characterized in that: The elastic component (4) comprises a locking shaft retaining ring (4-1), a locking shaft reset spring (4-2), an elastic chuck reset spring (4-3) and a fixed retaining ring (4-4); the fixed retaining ring (4-4) is fixed in the output shaft (1); the locking shaft retaining ring (4-1) is fixed to the upper end of the locking shaft (5) and is located above the fixed retaining ring (4-4); the locking shaft reset spring (4-2) and the elastic chuck reset spring (4-3) are both sleeved on the locking shaft (5); the locking shaft reset spring (4-2) is located outside the elastic chuck reset spring (4-3), and its two ends are respectively in contact with the locking shaft retaining ring (4-1) and the fixed retaining ring (4-4); the elastic chuck reset spring (4-3) passes through the fixed retaining ring (4-4), and its two ends are respectively in contact with the locking shaft retaining ring (4-1) and the elastic chuck (6).
5. The quick-change structure of a multifunctional tool according to claim 4, characterized in that: The output shaft (1) comprises an upper output shaft (1-2) and a lower output shaft (1-3), the upper end of the lower output shaft (1-3) being arranged inside the lower end of the upper output shaft (1-2); the elastic chuck (6) comprises a chuck ring (6-2) having an integral structure and an elastic claw (6-3) arranged below the chuck ring (6-2), the chuck ring (6-2) being sleeved on the locking shaft (5) and being located below the fixed retaining ring (4-4), and when the elastic chuck (6) is closed, the lower end surface of the chuck ring (6-2) matches the upper end surface of the lower output shaft (1-3).
6. The quick-change structure of a multifunctional tool according to claim 5, characterized in that: An elastic claw step (6-3-1) is provided at the bottom of the elastic claw (6-3), and the elastic claw step (6-3-1) is located below the lower output shaft (1-3). When the elastic clamp (6) is opened, the outer diameter of the elastic claw step (6-3-1) is greater than the inner diameter of the lower output shaft (1-3).
7. The quick-change structure of a multifunctional tool according to claim 6, characterized in that: The bottom of the locking shaft (5) is provided with a conical surface (5-1) and a locking shaft step (5-2) in sequence from top to bottom, the radius of the conical surface (5-1) gradually increases from top to bottom, the outer diameter of the locking shaft step (5-2) is larger than the outer diameter of the conical surface (5-1), and the conical surface (5-1) and the locking shaft step (5-2) are matched with the elastic claw step (6-3-1).
8. The quick-change structure of a multifunctional tool according to claim 5, characterized in that: A sliding groove (1-2-1) is symmetrically arranged on the inner side wall of the upper output shaft (1-2) along the axial direction, and a clamping ring protrusion (6-2-1) is symmetrically arranged on the outer ring of the clamping ring (6-2), and the clamping ring protrusion (6-2-1) slides in the sliding groove (1-2-1).
9. The quick-change structure of a multifunctional tool according to claim 8, characterized in that: The cam (3) is provided with a spiral cone surface (3-1), and the bottom of the spiral cone surface (3-1) is provided with a concave cam clamping platform (3-2); the pressure block (2) comprises an integrally arranged pressure block ring (2-1) and a pressure block boss (2-2); the pressure block boss (2-2) is arranged on the upper end surface of the pressure block ring (2-1) and cooperates with the spiral cone surface (3-1) on the cam (3); the outer ring of the pressure block ring (2-1) is symmetrically provided with pressure block ring bosses (2-1-1), and the pressure block ring bosses (2-1-1) slide in the sliding groove (1-2-1).