Clamping jaw type coupler of electric tool
By designing the power tool jaw coupling in a straight grinder, using a three jaw design that is male and female and elastic material buffer sleeve, the noise and vibration problems of the existing coupling are solved, and cost savings and Improved transmission stability.
Patent Information
- Application Number
- CN202421162737.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-27
AI Technical Summary
The existing couplings have noise and vibration problems in direct mills, and are complex in structure and costly.
A power tool jaw type coupling is designed, adopting a three jaw design that is male and female. Through intersecting contact of the jaws, the buffer sleeve of elastic material is combined to reduce the type and volume of parts, and reduce vibration during high-speed operation and noise.
It saves parts processing costs, reduces vibration and noise during high-speed operation, and improves the smoothness of transmission.
Smart Images
Figure CN222254768U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric tools, in particular to a claw-type coupling for electric tools. Background Art
[0002] In straight grinder products, a coupling is generally used to connect the motor shaft and the output shaft. In the prior art, the commonly used coupling connections mainly include steel sleeve coupling connection and male and female coupling connection.
[0003] However, existing couplings have many disadvantages:
[0004] (1) The existing steel sleeve coupling lacks rubber buffer and is prone to noise and vibration.
[0005] (2) The existing male and female couplings have complex structures, large volumes and high costs.
[0006] Therefore, it is urgent to design a power tool claw coupling to solve the above problems. Utility Model Content
[0007] The purpose of the present disclosure is to overcome the deficiencies of the prior art and provide a claw-type coupling for an electric tool.
[0008] To achieve the above objectives, the present disclosure adopts the following technical solutions:
[0009] According to one aspect of the present disclosure, there is provided a claw coupling of an electric tool, the electric tool comprising a housing, an output shaft extending in an axial direction and a rotor shaft driving the output shaft to rotate are arranged in the housing, a coupling is arranged between the output shaft and the rotor shaft, the coupling comprises a first coupling half connected to one of the output shaft and the rotor shaft, and a second coupling half connected to the other of the output shaft and the rotor shaft;
[0010] The first coupling half and the second coupling half have the same structure, and both the first coupling half and the second coupling half include a plurality of claws, and the first coupling half and the second coupling half are in axial interpenetration contact through the claws.
[0011] In an exemplary embodiment of the present disclosure, the first coupling half and the second coupling half further include a disc, and the claws are symmetrically arranged on the disc.
[0012] In an exemplary embodiment of the present disclosure, the claw is a cantilever structure.
[0013] In an exemplary embodiment of the present disclosure, the number of the claws of the first coupling half and the second coupling half is three.
[0014] In an exemplary embodiment of the present disclosure, the claw of the first coupling half and the claw of the second coupling half are male and female to each other;
[0015] The claws of the first coupling half are in interlaced contact with the claws of the second coupling half.
[0016] In an exemplary embodiment of the present disclosure, the first coupling half and the second coupling half are formed by any one of powder metallurgy, metal powder injection, and insert injection molding.
[0017] In an exemplary embodiment of the present disclosure, a buffer sleeve is disposed between the first coupling half and the second coupling half.
[0018] In an exemplary embodiment of the present disclosure, both sides of the buffer sleeve are respectively provided with clamping grooves having the same number as the clamping claws on the same side, and the clamping grooves are used to accommodate the clamping claws.
[0019] In an exemplary embodiment of the present disclosure, the distance between the buffer sleeve and the first coupling half and the second coupling half is not less than 0.1 mm.
[0020] In an exemplary embodiment of the present disclosure, the buffer sleeve is made of elastic material.
[0021] The utility model has at least the following beneficial effects:
[0022] The present invention provides a claw-type coupling for electric tools, which adopts a three-claw design that is male and female to each other, reduces the number of types and overall dimensions of coupling parts, saves parts processing or mold costs, saves electric tool space, and reduces vibrations generated during high-speed operation; a rubber buffer sleeve is used to perform a soft connection inside the coupling, thereby reducing vibration and noise during operation of the coupling, eliminating some errors, and making the coupling transmission smoother. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.
[0024] Figure 1 This is a schematic diagram of the overall structure of an electric tool in one embodiment of the present disclosure;
[0025] Figure 2An assembly diagram of a claw coupling of an electric tool in one embodiment of the present disclosure;
[0026] Figure 3 This is an AA cross-sectional view of a claw-type coupling of an electric tool in one embodiment of the present disclosure;
[0027] Figure 4 This is a schematic structural diagram of a first coupling half in one embodiment of the present disclosure;
[0028] Figure 5 It is a schematic structural diagram of a buffer sleeve in one embodiment of the present disclosure.
[0029] Description of reference numerals:
[0030] 1. Housing; 2. Output shaft; 3. Rotor shaft; 4. Coupling; 401. First coupling half; 402. Second coupling half; 403. Claw; 404. Disc; 5. Buffer sleeve; 501. Slot. DETAILED DESCRIPTION
[0031] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present disclosure will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted. In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale.
[0032] The present disclosure provides a claw coupling for an electric tool. Figures 1 to 4 The electric tool includes a housing 1, in which an output shaft 2 extending in the axial direction and a rotor shaft 3 driving the output shaft 2 to rotate are arranged, a coupling 4 is arranged between the output shaft 2 and the rotor shaft 3, and the coupling 4 includes a first coupling half 401 connected to one of the output shaft 2 and the rotor shaft 3, and a second coupling half 402 connected to the other of the output shaft 2 and the rotor shaft 3; the first coupling half 401 and the second coupling half 402 have the same structure, and the first coupling half 401 and the second coupling half 402 both include a plurality of claws 403, and the first coupling half 401 and the second coupling half 402 are in axial interlaced contact with each other through the claws 403.
[0033] In the disclosed embodiment, the electric tool is composed of a housing 1, an output shaft 2, a rotor shaft 3 and a coupling 4. The output shaft 2 and the rotor shaft 3 are connected through the coupling 4. The coupling 4 is composed of a first coupling half 401 and a second coupling half 402. The first coupling half 401 is connected to one of the output shaft 2 and the rotor shaft 3, and the second coupling half 402 is connected to the other of the output shaft 2 and the rotor shaft 3. The first coupling half 401 and the second coupling half 402 both contain a plurality of claws 403. The interlaced contact of the plurality of claws 403 of the first coupling half 401 and the second coupling half 402 realizes power transmission.
[0034] Compared with the existing coupling structure, the electric tool claw coupling adopts an interlaced contact claw design, which reduces the number of coupling parts types and the overall size, saves parts processing or mold costs, saves power tool space, and reduces vibrations generated during high-speed operation.
[0035] In one example, the first coupling half 401 is connected to the output shaft 2 , and the second coupling half 402 is connected to the rotor shaft 3 .
[0036] In another example, the first coupling half 401 is connected to the rotor shaft 3 , and the second coupling half 402 is connected to the output shaft 2 .
[0037] In one embodiment of the present disclosure, see Figure 4 The first coupling half 401 and the second coupling half 402 further include a disc 404, and the claws 403 are symmetrically arranged on the disc 404. In this way, the plurality of claws 403 are evenly arranged on the disc 404 using a symmetrical design, which can reduce the additional vibration caused by the imbalance of the coupling 4 when rotating at high speed.
[0038] In one embodiment of the present disclosure, see Figure 2 and Figure 4 The claw 403 is a cantilever structure. In this way, the claw 403 cooperates with the disc 404 to improve the strength of the coupling 4.
[0039] In one embodiment of the present disclosure, see Figure 3 and Figure 4 , the number of claws 403 of the first coupling half 401 and the second coupling half 402 is three. In this way, the first coupling half 401 and the second coupling half 402 adopt a three-claw design to achieve prime number transmission between the first coupling half 401 and the second coupling half 402, avoiding resonance between the first coupling half 401 and the second coupling half 402 due to the multiple of the claws 403.
[0040] Optionally, the three claws 403 are evenly distributed on the disc 404 , and the claws 403 of the first coupling half 401 are arranged opposite to the claws 403 of the second coupling half 402 .
[0041] In one embodiment of the present disclosure, see Figures 2 to 4 The claw 403 of the first coupling half 401 and the claw 403 of the second coupling half 402 are male and female to each other; the claw 403 of the first coupling half 401 and the claw 403 of the second coupling half 402 are interlaced and contacted. In this way, the first coupling half 401 and the second coupling half 402 have the same structure, which reduces the number of parts types of the coupling 4, reduces the outer diameter size and structural volume of the coupling 4, reduces the unbalance error between the first coupling half 401 and the second coupling half 402, and reduces the vibration of the coupling 4.
[0042] In one embodiment of the present disclosure, the first coupling half 401 and the second coupling half 402 are formed by any one of powder metallurgy, metal powder injection, and insert injection molding. In this way, the coupling 4 can be quickly processed, saving the processing cost of the first coupling half 401 and the second coupling half 402.
[0043] Optionally, the first coupling half 401 and the second coupling half 402 may be formed by any one of powder metallurgy, metal powder injection, and insert injection molding, or may be formed by other processes.
[0044] In one embodiment of the present disclosure, see Figures 1 to 3 , a buffer sleeve 5 is provided between the first coupling half 401 and the second coupling half 402. In this way, the first coupling half 401 and the second coupling half 402 are separated by the buffer sleeve 5, so as to reduce the impact between the first coupling half 401 and the second coupling half 402 when the coupling 4 is running, and eliminate part of the error between the first coupling half 401 and the second coupling half 402, so that the transmission of the first coupling half 401 and the second coupling half 402 is smoother.
[0045] In one embodiment of the present disclosure, see Figure 5 The buffer sleeve 5 has two sides respectively provided with the same number of slots 501 as the claws 403 on the same side, and the slots 501 are used to accommodate the claws 403. In this way, the first coupling half 401 and the second coupling half 402 can be completely separated to avoid direct contact between the first coupling half 401 and the second coupling half 402.
[0046] Optionally, three slots 501 are respectively provided on both sides of the buffer sleeve 5 , the extending directions of the slots 501 on both sides of the buffer sleeve 5 are opposite, and the slots 501 on both sides of the buffer sleeve 5 are arranged at intervals.
[0047] In one embodiment of the present disclosure, the spacing between the buffer sleeve 5 and the first coupling half 401 and the second coupling half 402 is not less than 0.1 mm. In this way, the concentricity error between the output shaft 2 and the rotor shaft 3 can be absorbed, and the transmission stability can be improved.
[0048] In one embodiment of the present disclosure, the buffer sleeve 5 is made of elastic material, so that the buffer effect of the buffer sleeve 5 can be improved.
[0049] Optionally, the buffer sleeve 5 is made of rubber.
[0050] Optionally, the buffer sleeve 5 is made of plastic.
[0051] In one embodiment of the present disclosure, when the coupling 4 is used in heavy-load situations, it can be formed by an insert injection molding process, and a buffer sleeve 5 made of rubber material is arranged between the first coupling half 401 and the second coupling half 402 .
[0052] In another embodiment of the present disclosure, when the coupling 4 is used in non-heavy-load situations, it can also be formed by insert injection molding, and the first coupling half 401 and the second coupling half 402 may not be provided with the rubber buffer sleeve 5.
[0053] In one embodiment of the present disclosure, the electric tool claw coupling can be used for straight grinder products, and can also be used for other products that require a coupling.
[0054] In one embodiment of the present disclosure, the power output by the motor is transmitted from the first coupling half 401 pressed onto the rotor shaft 3 to the second coupling half 402 pressed onto the output shaft 2 via the rubber buffer sleeve 5, thereby driving the output shaft 2 to rotate and complete the operation.
[0055] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the utility model disclosed herein. This application is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.
Claims
1. A claw coupling for an electric tool, the electric tool comprising a housing (1), an output shaft (2) extending in an axial direction and a rotor shaft (3) driving the output shaft (2) to rotate are arranged in the housing (1), characterized in that: A coupling (4) is provided between the output shaft (2) and the rotor shaft (3), the coupling (4) comprising a first coupling half (401) connected to one of the output shaft (2) and the rotor shaft (3), and a second coupling half (402) connected to the other of the output shaft (2) and the rotor shaft (3); The first coupling half (401) and the second coupling half (402) have the same structure, and both the first coupling half (401) and the second coupling half (402) include a plurality of claws (403), and the first coupling half (401) and the second coupling half (402) are in axial interpenetration contact with each other through the claws (403).
2. The electric tool claw coupling according to claim 1, characterized in that: The first coupling half (401) and the second coupling half (402) further include a disk (404), and the claws (403) are symmetrically arranged on the disk (404).
3. The claw coupling of an electric tool according to claim 1, characterized in that: The clamping claw (403) is a cantilever structure.
4. The claw coupling of an electric tool according to claim 1, characterized in that: The number of the claws (403) of the first coupling half (401) and the second coupling half (402) is three.
5. The claw coupling of an electric tool according to claim 1, characterized in that: The clamping claw (403) of the first coupling half (401) and the clamping claw (403) of the second coupling half (402) are male and female to each other; The claw (403) of the first coupling half (401) is in interlaced contact with the claw (403) of the second coupling half (402).
6. The electric tool claw coupling according to claim 1, characterized in that: The first coupling half (401) and the second coupling half (402) are formed by any one of powder metallurgy, metal powder injection and insert molding.
7. The claw coupling of an electric tool according to claim 1, characterized in that: A buffer sleeve (5) is provided between the first coupling half (401) and the second coupling half (402).
8. The claw coupling of an electric tool according to claim 7, characterized in that: The buffer sleeve (5) is provided with a number of clamping grooves (501) on both sides thereof, which is the same as the number of the clamping claws (403) on the same side, respectively. The clamping grooves (501) are used to accommodate the clamping claws (403).
9. The claw coupling of an electric tool according to claim 7, characterized in that: The distance between the buffer sleeve (5) and the first coupling half (401) and the second coupling half (402) is not less than 0.1 mm.
10. The electric tool claw coupling according to claim 7, characterized in that: The buffer sleeve (5) is made of elastic material.