Multifunctional saw clamping device suitable for various saw blade installations
By introducing detachable adapters and various positioning parts into the saw blade clamping device, the problem of insufficient applicability of existing devices is solved, and the compatibility and stable clamping of various saw blades are realized, thus improving the applicability of the clamping device.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG BURLEY TOOLS
- Filing Date
- 2025-08-01
- Publication Date
- 2026-07-03
AI Technical Summary
Existing saw blade clamping devices can only clamp one type of saw blade corresponding to the positioning part set on the pressure block, which has poor applicability and cannot adapt to multiple types of saw blades.
A multifunctional saw clamping device was designed. A detachable adapter is set between the clamp and the clamping member. The adapter is provided with a mating part for different saw blades to achieve the adaptation of various saw blades. The clamp is provided with a first positioning part and a connection part of the adapter. The clamp is provided with a second positioning part to restrict the relative rotation of the saw blade and the adapter.
The applicability of the clamping device has been improved, enabling it to accommodate two types of saw blade installations and enhancing the flexibility and adaptability of clamping.
Smart Images
Figure CN224444741U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a multi-functional saw, and more particularly to a multi-functional saw clamping device that is compatible with the installation of various saw blades. Background Technology
[0002] Multi-functional saws are common handheld oscillating power tools in the industry. They possess various operating functions, such as sawing, cutting, grinding, and scraping, to adapt to different work needs. A multi-functional saw is an electric sawing device that drives a saw blade to oscillate back and forth to cut materials; it is also a portable small power tool. Currently, common oscillating saws mainly consist of: a housing, an oscillating shaft, a saw blade, and a drive structure that drives the oscillating shaft to oscillate back and forth. The saw blade is usually fixedly connected to the bottom of the oscillating shaft by a clamping device.
[0003] For example, patent CN208644262U discloses a saw blade clamping device for a multi-functional saw and a multi-functional saw. The multi-functional saw includes a head shell, an output shaft inside the head shell, and a hollow cavity inside the output shaft to form an installation cavity. The saw blade clamping device includes a trigger, a pressure block, a connecting part, and a clamping head. The trigger is located at the upper end of the output shaft and connected to the connecting part. The pressure block is sleeved on the lower end of the output shaft. The clamping head includes a clamping block and a connecting post. The clamping block is located below the pressure block, and the saw blade is located between the pressure block and the pressure block. The lower end face of the pressure block has a positioning protrusion, and the saw blade has a positioning hole that mates with the positioning protrusion. Alternatively, the lower end of the pressure block has a positioning hole, and the saw blade has a positioning protrusion that mates with the positioning hole. The connecting post passes through the saw blade and the pressure block and extends into the installation cavity. Horizontally rotating the trigger changes the relative position of the connecting part and the connecting post in the circumferential direction to change the engagement state of the connecting part and the connecting post, thereby realizing the assembly and disassembly of the clamping head.
[0004] Existing saw blade clamping devices can only accommodate one type of positioning part on the lower end face of the pressure block to position and cooperate with the saw blade, thus limiting the relative position of the saw blade and the pressure block in the circumferential direction. This results in the clamping device being limited to installing only one type of saw blade corresponding to the positioning part on the pressure block, making it unsuitable for clamping and installing other types of saw blades. Utility Model Content
[0005] Based on the problem that the saw blade clamping device described above only has one type of positioning part on the pressure block to cooperate with the saw blade positioning, which is used to limit the relative position of the saw blade and the pressure block in the circumferential direction, the clamping device can only install one type of saw blade corresponding to the positioning part on the pressure block, resulting in poor applicability, this utility model provides a multi-functional saw clamping device that is compatible with the installation of multiple saw blades.
[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a multi-functional saw clamping device adapted to the installation of various saw blades, including a housing, an output shaft provided inside the housing, and a clamping mechanism for clamping saw blades provided on the output shaft. The clamping mechanism includes a clamping seat, an adapter, and a pressing member. The clamping seat is provided with a first positioning part corresponding to the mating part on one type of saw blade. The adapter is located below the clamping seat, and a connecting part is provided on the side of the adapter opposite to the clamping seat. The connecting part is configured to have the same structure as the mating part of the saw blade corresponding to the first positioning part. The first positioning part cooperates with the connecting part to restrict the relative rotation of the adapter and the clamping seat. The pressing member is located below the adapter, and a second positioning part is provided on the side of the adapter opposite to the pressing member, corresponding to the mating part on another type of saw blade. The saw blade is clamped between the adapter and the pressing member. The second positioning part cooperates with the mating part on the saw blade to limit the relative rotation between the saw blade and the adapter. The adapter is designed to be detachable. After the adapter is detached, the clamping seat cooperates with the pressing member to clamp and fix the saw blade.
[0007] A further preferred embodiment of this utility model is as follows: the output shaft has openings at both its upper and lower ends and forms a receiving cavity inside. The clamping seat is sleeved on the lower end of the output shaft. A connecting rod is fixed on the clamping member. The connecting rod passes through the saw blade, the adapter, and the clamping seat and extends into the receiving cavity from the opening at the lower end of the output shaft. The multi-functional saw clamping device also includes an operating mechanism, an elastic chuck, a first spring, a chuck sleeve, and a linkage rod. The elastic chuck is placed in the receiving cavity, and the connecting rod is inserted into the elastic chuck. The first spring and the chuck sleeve are both sleeved on the outside of the elastic chuck. One end of the first spring abuts against the bottom wall of the receiving cavity, and the other end of the first spring abuts against the chuck sleeve. The chuck sleeve acts as... A connecting rod used in a flexible chuck to clamp the inserting part of the chuck. The connecting rod includes a push rod and a top ring. The top ring is fixed to the bottom of the push rod and is located above the chuck sleeve. An output cover is connected to the opening at the upper end of the output shaft. The output cover abuts against the upper limit of the top ring. The upper end of the push rod protrudes from the output cover. The operating mechanism includes a cam and an operating handle. The cam and the operating handle are pivotally connected to the housing. The cam is located above the push rod and connected to the operating handle. The upper end of the push rod abuts against the cam. When the operating handle drives the cam to rotate, the cam pushes the push rod downward. The top ring pushes the chuck sleeve downward, causing the flexible chuck to release the clamping connecting rod.
[0008] A further preferred technical solution of this utility model is as follows: the lower end of the output shaft is provided with a downwardly protruding post, a first step is formed between the post and the outer wall of the output shaft, the center of the clamp is provided with a first through hole, the clamp is sleeved on the post and abuts against the first step, and the opening at the lower end of the output shaft is opened on the lower end surface of the post.
[0009] A further preferred technical solution of this utility model is as follows: the output shaft has openings at both the upper and lower ends and forms a receiving cavity inside. The receiving cavity contains a linkage rod and a second spring. The upper end of the linkage rod extends from the upper opening of the output shaft, and the lower end of the linkage rod extends from the lower opening of the output shaft. The clamp, adapter, and saw blade are all sleeved on the outside of the lower end of the linkage rod. The clamp is fixedly mounted on the lower end of the output shaft. The clamping member is threadedly connected to the lower end of the linkage rod. The linkage rod has an outer ring protrusion. One end of the second spring abuts against the clamp, and the other end of the second spring abuts against the outer ring protrusion. The second spring has an elastic force to push the linkage rod upward. The outer ring protrusion abuts against the upper limit of the top cavity wall of the receiving cavity. The operating mechanism includes a cam and an operating handle. The cam and the operating handle are pivotally connected to the housing. The cam is located above the linkage rod and connected to the operating handle. The top end of the linkage rod abuts against the cam. When the operating handle drives the cam to rotate, the cam pushes the linkage rod downward, causing the clamping member to move downward and release the clamped saw blade.
[0010] A further preferred embodiment of this utility model is as follows: the clamp is provided with a protruding plug post, which is inserted into the opening at the lower end of the output shaft and threadedly connected to the output shaft, and the clamp rests against the lower end of the output shaft.
[0011] A further preferred technical solution of this utility model is as follows: the first positioning part is a positioning protrusion, a plurality of positioning protrusions are evenly provided on the lower end surface of the clamp along its circumference, the mating part on the saw blade that corresponds to the first positioning part is a positioning hole, the connecting part is a connecting hole with the same structure as the positioning hole, the upper end surface of the adapter is evenly provided with the same number of connecting holes as the positioning protrusions along its circumference, and the positioning protrusions are inserted into the connecting holes to restrict the relative rotation of the adapter and the clamp.
[0012] A further preferred embodiment of this utility model is as follows: the second positioning part is a positioning groove, and the mating part on the saw blade that corresponds to the second positioning part is a positioning cam. The positioning cam is inserted into the positioning groove to limit the relative rotation of the saw blade and the adapter.
[0013] A further preferred technical solution of this utility model is as follows: the positioning cam includes a disc body, and a plurality of protruding teeth are evenly provided on the outer peripheral surface of the disc body. The inner wall of the positioning groove is provided with a plurality of tooth grooves corresponding to the protruding teeth respectively. When the disc body is inserted into the positioning groove, the protruding teeth are engaged in the tooth grooves.
[0014] A further preferred embodiment of this utility model is that the lower end face of the clamping member is provided with two disassembly grooves.
[0015] Compared with the prior art, the advantages of this utility model are that the clamp is provided with a first positioning part corresponding to the mating part on a saw blade, the adapter is located below the clamp, and the adapter is provided with a connecting part on the side opposite to the clamp. The connecting part is configured to have the same structure as the mating part of the saw blade corresponding to the first positioning part. The first positioning part cooperates with the connecting part to restrict the relative rotation of the adapter and the clamp. The clamping part is located below the adapter, and the adapter is provided with a second positioning part corresponding to the mating part on another saw blade on the side opposite to the clamp. The saw blade is clamped between the adapter and the clamp. The second positioning part cooperates with the mating part on the saw blade to restrict the relative rotation between the saw blade and the adapter. The adapter is designed to be detachable. When it is necessary to install a saw blade corresponding to the first positioning part, the adapter is detached. At this time, the clamp cooperates with the clamp to clamp and fix the saw blade. The first positioning part cooperates with the mating part on the saw blade to limit the relative rotation between the saw blade and the clamp. By adding an adapter, the clamping device can be used for the installation of two types of saw blades, thus improving the applicability of the clamping device. Attached Figure Description
[0016] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.
[0017] Figure 1 This is a schematic diagram of the structure of Embodiment 1;
[0018] Figure 2 This is a cross-sectional schematic diagram of Example 1;
[0019] Figure 3 This is a schematic diagram showing the disassembled clamping mechanism, saw blade, and output shaft of Embodiment 1;
[0020] Figure 4 This is a schematic diagram of the structure of the elastic clamp;
[0021] Figure 5 This is a schematic diagram of the clamping seat in Embodiment 1;
[0022] Figure 6 This is a schematic diagram of the results of Example 2;
[0023] Figure 7 This is a cross-sectional schematic diagram of Example 2;
[0024] Figure 8 This is a schematic diagram showing the disassembled clamping mechanism, saw blade, and output shaft of Embodiment 2;
[0025] Figure 9This is a schematic diagram of the structure of the clamp in Example 2;
[0026] Figure 10 Schematic diagram of the adapter Figure 1 ;
[0027] Figure 11 Schematic diagram of the adapter Figure 2 ;
[0028] Figure 12 This is a schematic diagram of the saw blade.
[0029] In the diagram: 1. Housing; 2. Clamp; 3. Adapter; 4. Saw blade; 5. Operating handle; 6. Cam; 7. Output cover; 8. First through hole; 9. Top rod; 10. Top ring; 11. Frustum-shaped protrusion; 12. Receiving cavity; 13. Chuck sleeve; 14. First spring; 15. Elastic chuck; 16. Connecting rod; 17. Protrusion; 18. Clamping component; 19. First step; 20. Output shaft; 21. Clamping jaw; 22. Positioning protrusion; 23. First through hole; 24. Insertion post; 25. Second through hole; 26. Linkage rod; 27. Outer ring protrusion; 28. Second spring; 29. Disassembly groove; 30. Positioning groove; 31. Second through hole; 32. Tooth groove; 33. Connecting hole; 34. Positioning protrusion; 35. Protruding tooth; 36. Third through hole. Detailed Implementation
[0030] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.
[0031] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.
[0032] Example 1
[0033] Figures 1-5 , Figures 10-12 As shown, a multi-functional saw clamping device that is compatible with various saw blade installations includes a housing 1. An output shaft 20 is provided inside the housing 1. The output shaft 20 is rotatably installed inside the housing 1. The lower end of the output shaft 20 extends out of the housing 1. The lower end of the output shaft 20 is used to install a saw blade 4 located outside the housing 1. A clamping mechanism for clamping the saw blade 4 is provided on the output shaft 20.
[0034] The clamping mechanism includes a clamping base 2, an adapter 3, and a clamping member 18. The clamping base 2 has a first positioning part corresponding to the mating part on one type of saw blade 4. The adapter 3 is located below the clamping base 2. The adapter 3 has a connecting part on the side opposite to the clamping base 2. The connecting part is configured to have the same structure as the mating part on the saw blade 4 corresponding to the first positioning part. The first positioning part cooperates with the connecting part to restrict the relative rotation between the adapter 3 and the clamping base 2. The clamping member 18 is located below the adapter 3. The adapter 3 has a second positioning part on the side opposite to the clamping member 18, corresponding to the mating part on another type of saw blade 4. The saw blade 4 is clamped between the adapter 3 and the clamping member 18. The second positioning part cooperates with the mating part on the saw blade 4 to restrict the relative rotation between the saw blade 4 and the adapter 3. The adapter 3 is designed to be detachable. After the adapter 3 is detached, the clamping base 2 cooperates with the clamping member 18 to clamp and fix the saw blade 4.
[0035] Figures 1-4 As shown, specifically, the output shaft 20 has openings at both the upper and lower ends and forms a receiving cavity 12 inside. The clamping seat 2 is sleeved on the lower end of the output shaft 20. A connecting rod 16 is fixed on the clamping member 18. The connecting rod 16 passes through the saw blade 4, the adapter 3, and the clamping seat 2 and extends into the receiving cavity 12 from the opening at the lower end of the output shaft 20. The multi-functional clamping device also includes an operating mechanism, an elastic chuck 15, a first spring 14, a chuck sleeve 13, and a linkage rod 26. The elastic chuck 15 is placed in the receiving cavity 12, and the connecting rod 16 is inserted into the elastic chuck 15. The first spring 14 and the chuck sleeve 13 are both sleeved on the outside of the elastic chuck 15. One end of the first spring 14 abuts against the bottom wall of the receiving cavity 12, and the other end of the first spring 14 abuts against the chuck sleeve 13. The chuck sleeve 13 acts on the elastic chuck 15 to clamp the inserted connecting rod 16 at the clamping jaw 21 of the elastic chuck 15. 6 includes a push rod 9 and a top ring 10. The top ring 10 is fixed to the bottom of the push rod 9 and is located above the chuck sleeve 13. An output cover 7 is connected to the opening at the upper end of the output shaft 20. The output cover 7 is threaded onto the opening at the upper end of the output shaft 20. The output cover 7 is screwed into the opening at the lower end of the output shaft 20 and abuts against the top ring 10 to restrict the upward movement of the top ring 10 and the push rod 9. The upper end of the push rod 9 protrudes from the output cover 7. The output cover 7 is provided with a first through hole 8 for the push rod 9 to pass through. The first through hole 8 can guide the up and down movement of the push rod 9. The operating mechanism includes a cam 6 and an operating handle 5. The cam 6 and the operating handle 5 are pivotally connected to the housing 1. The cam 6 is connected to the operating handle 5 so that when the operating handle 5 rotates, it can drive the cam 6 to rotate synchronously. The cam 6 is located above the push rod 9, and the upper end of the push rod 9 abuts against the cam 6. The structure of the operating handle 5 controlling the elastic chuck 15 to clamp or release the connecting rod 16 is a conventional structure, and can be found in patent CN208034205U.
[0036] When it is necessary to disassemble the saw blade 4 or the adapter 3, turn the operating handle 5. The operating handle 5 drives the cam 6 to rotate. During the rotation of the cam 6, the push rod 9 and the top ring 10 move downward. The top ring 10 pushes the chuck sleeve 13 downward, causing the elastic chuck 15 to release the clamping link 16. At this time, the clamping part 18 is removed from the output shaft 20. After the clamping part 18 is removed, the saw blade 4 and the adapter 3 are also separated from the output shaft 20. When it is necessary to install the saw blade 4 between the adapter 3 and the clamping part 18, turn the operating handle 5. The operating handle 5 drives the cam 6 to rotate. During the rotation of the cam 6, the push rod 9 and the top ring 10 move downward. The top ring 10 pushes the chuck sleeve 13 downward, causing the elastic chuck 15 to be in a released state. The connecting part on the adapter 3 is engaged with the first positioning part on the clamping seat 2, and the engaging part on the saw blade 4 is engaged with the second positioning part on the adapter 3. Then, the connecting rod 16 passes upward through the saw blade 4, the adapter 3, and the clamping seat. 2. Insert the connecting rod 16 into the elastic chuck 15 inside the receiving cavity 12, and then rotate the operating handle 5 in the opposite direction. The operating handle 5 drives the cam 6 to rotate in the opposite direction. During the rotation of the cam 6, the first spring 14 pushes the chuck sleeve 13 to move upward and reset, so that the chuck sleeve 13 can move and act on the elastic chuck 15. The clamping jaw 21 of the elastic chuck 15 clamps the inserted connecting rod 16. During the movement of the chuck sleeve 13, it pushes the top ring 10 and the top cover to move upward, so that the upper end of the top rod 9 is in abutting state with the cam 6. When it is necessary to use the clamping seat 2 to cooperate with the clamping member 18 for clamping, by inserting more of the connecting rod 16 into the elastic chuck 15, the clamping member 18 can press the saw blade 4 tightly onto the clamping seat 2 after the adapter 3 is removed.
[0037] A frustum-shaped protrusion 11 is provided on the inner wall of the top ring 10. During the process of the top ring 10 moving down and pushing the chuck sleeve 13 down, the frustum-shaped protrusion 11 inserts into the top opening of the elastic chuck 15, causing the upper part of the elastic chuck 15 to open, which facilitates the insertion or disengagement of the connecting rod 16.
[0038] By providing a connector 3 between the clamping seat 2 and the clamping member 18, a connecting part with the same structure as the mating part of the saw blade 4 corresponding to the first positioning part is provided on the upper end surface of the connector 3, and a second positioning part corresponding to the mating part on another saw blade 4 is provided on the lower end surface of the connector 3. When it is necessary to assemble a saw blade 4 corresponding to the second positioning part, the connector 3 is connected between the clamping seat 2 and the saw blade 4. The connecting part on the connector 3 mates with the first positioning part on the clamping seat 2, and the second positioning part on the connector 3 mates with the mating part on the saw blade 4, so that the saw blade 4 can be assembled. The relative rotation between the saw blade 4, the adapter 3, and the clamp 2 is restricted. At this time, the adapter 3 cooperates with the clamping part 18 to clamp and fix the saw blade 4. When it is necessary to assemble the saw blade 4 corresponding to the first positioning part, the adapter 3 is disassembled, so that the clamp 2 cooperates with the clamping part 18 to clamp and fix the saw blade 4 between the two. The first positioning part on the clamp 2 cooperates with the mating part on the saw blade 4 to restrict the relative rotation between the clamp 2 and the saw blade 4. This structure, by adding an adapter 3, makes the clamping device applicable to the installation of two types of saw blades 4, thereby improving the applicability of the clamping device.
[0039] The lower end of the output shaft 20 is provided with a downward protruding post 17. A first step 19 is formed between the post 17 and the outer wall of the output shaft 20. The center of the clamp 2 is provided with a first through hole 23. The clamp 2 is sleeved on the post 17 through the first through hole 23 and abuts against the first step 19. The opening at the lower end of the output shaft 20 is opened on the lower end surface of the post 17.
[0040] The relative rotation between the clamp 2 and the output shaft 20 can be restricted by the upward clamping force of the clamping member 18. The clamping force of the clamping member 18 presses the clamp 2 tightly onto the first step 19, so that the friction between the first step 19 and the clamp 2 restricts the relative rotation between the clamp 2 and the output shaft 20, so that the output shaft 20 can drive the saw blade 4 to move.
[0041] The relative rotation between the clamp 2 and the output shaft 20 is restricted by the screw connection between the clamp 2 and the protrusion 17. The clamp 2 is screwed onto the protrusion 17, so that the clamp 2 and the protrusion 17 are fixed together, and the output shaft 20 can drive the saw blade 4 to move.
[0042] The relative rotation between the clamp 2 and the output shaft 20 can be restricted by setting a first straight edge on the outer periphery of the protrusion 17 and a second straight edge on the inner wall of the first through hole 23. The first straight edge and the second straight edge fit together to restrict the relative rotation between the clamp 2 and the output shaft 20, so that the output shaft 20 can drive the saw blade 4 to move.
[0043] The adapter 3 has a second through hole 31, the saw blade 4 has a third through hole 36, and the connecting rod 16 passes through the second through hole 31 and the third through hole 36.
[0044] Figure 5 , Figure 11As shown, preferably, the first positioning part is a positioning protrusion 22. Multiple positioning protrusions 22 are evenly arranged circumferentially on the lower end surface of the clamping seat 2. A corresponding mating part on the saw blade 4 that cooperates with the first positioning part is a positioning hole (e.g., the saw blade 4 disclosed in patent CN215145285U). Multiple positioning holes corresponding to the positioning protrusions 22 surround the third through hole 36 on the saw blade 4. The connecting part is a connecting hole 33 with the same structure as the positioning hole. The upper end surface of the adapter 3 is evenly arranged with the same number of connecting holes 33 as the positioning protrusions 22. The connecting holes 33 surround the second through hole 31. The positioning protrusion is inserted into the connecting hole 33 to restrict the relative rotation of the adapter 3 and the clamping seat 2. After the adapter 3 is disassembled, the positioning protrusions 22 on the clamping seat 2 can be directly inserted into the positioning holes on this type of saw blade 4. At this time, the clamping seat 2, in conjunction with the clamping member 18, clamps and fixes the saw blade 4.
[0045] Figure 10 , Figure 12 As shown, the second positioning part is a positioning groove 30. Another type of saw blade 4 has a corresponding mating part that cooperates with the second positioning part, which is a positioning cam 34 (for example, the saw blade 4 disclosed in patent CN210210271U). The positioning cam 34 is inserted into the positioning groove 30 to limit the relative rotation of the saw blade 4 and the adapter 3. The second through hole 31 is opened at the bottom of the positioning groove 30. The third through hole 36 of this type of saw blade 4 is opened at the center of the top end face of the positioning cam 34. The positioning cam 34 is inserted into the positioning groove 30 to limit the relative rotation of the saw blade 4 and the adapter 3.
[0046] Preferably, the positioning cam 34 includes a disc body, and a plurality of protruding teeth 35 are evenly provided on the outer peripheral surface of the disc body. A plurality of tooth grooves 32 corresponding to the protruding teeth 35 are provided on the inner wall of the positioning groove 30. When the disc body is inserted into the positioning groove 30, the protruding teeth 35 are engaged in the tooth grooves 32 to restrict the relative rotation of the adapter 3 and the saw blade 4.
[0047] Example 2
[0048] Figures 6-12 As shown, a multi-functional saw clamping device that is compatible with various saw blade installations includes a housing 1. An output shaft 20 is provided inside the housing 1. The output shaft 20 is rotatably installed inside the housing 1. The lower end of the output shaft 20 extends out of the housing 1. The lower end of the output shaft 20 is used to install a saw blade 4 located outside the housing 1. A clamping mechanism for clamping the saw blade 4 is provided on the output shaft 20.
[0049] The clamping mechanism includes a clamping base 2, an adapter 3, and a clamping member 18. The clamping base 2 has a first positioning part corresponding to the mating part on one type of saw blade 4. The adapter 3 is located below the clamping base 2. The adapter 3 has a connecting part on the side opposite to the clamping base 2. The connecting part is configured to have the same structure as the mating part on the saw blade 4 corresponding to the first positioning part. The first positioning part cooperates with the connecting part to restrict the relative rotation between the adapter 3 and the clamping base 2. The clamping member 18 is located below the adapter 3. The adapter 3 has a second positioning part on the side opposite to the clamping member 18, corresponding to the mating part on another type of saw blade 4. The saw blade 4 is clamped between the adapter 3 and the clamping member 18. The second positioning part cooperates with the mating part on the saw blade 4 to restrict the relative rotation between the saw blade 4 and the adapter 3. The adapter 3 is designed to be detachable. After the adapter 3 is detached, the clamping base 2 cooperates with the clamping member 18 to clamp and fix the saw blade 4.
[0050] Figure 7 As shown, specifically, the output shaft 20 has openings at both the top and bottom, and a first receiving cavity 12 is formed inside. The receiving cavity 12 houses a linkage rod 26 and a second spring 28. The upper end of the linkage rod 26 extends from the upper opening of the output shaft 20, and the lower end extends from the lower opening of the output shaft 20. The clamp 2, adapter 3, and saw blade 4 are all fitted around the lower end of the linkage rod 26. The clamp 2 is fixedly mounted on the lower end of the output shaft 20. The clamping member 18 is threadedly connected to the lower end of the linkage rod 26. The linkage rod 26 has an outer ring protrusion 27. One end of the second spring 28 abuts against the clamp 2, and the other end of the second spring 28 abuts against the outer ring protrusion 27. The second spring 28 has an elastic force that pushes the linkage rod 26 upward. The outer ring protrusion 27 abuts against the upper limit of the top cavity wall of the receiving cavity 12, preventing the linkage rod 26 from disengaging from the output shaft 20. The operating mechanism includes a cam 6 and an operating handle 5. The cam 6 and the operating handle 5 are pivotally connected to the housing 1. The cam 6 is connected to the operating handle 5 so that when the operating handle 5 rotates, it can drive the cam 6 to rotate synchronously. The cam 6 is located above the linkage rod 26, and the upper end of the linkage rod 26 abuts against the cam 6. When the operating handle 5 drives the cam 6 to rotate, the cam 6 pushes the linkage rod 26 downward, causing the clamping member 18 to move downward and release the clamped saw blade 4. The structure of the operating handle 5 is a conventional structure, which can be referred to in patent CN208034205U.
[0051] When it is necessary to disassemble the saw blade 4 or the adapter 3, turn the operating handle 5. The operating handle 5 drives the cam 6 to rotate. During the rotation of the cam 6, the linkage rod 26 is pushed down. The linkage rod 26 drives the clamping part 18 on the lower end to move down, so that the clamping part 18, the saw blade 4, the adapter 3 and the clamp 2 are no longer in close contact. At this time, the saw blade 4 and / or the adapter 3 can be disassembled by unscrewing the clamping part 18 off the linkage rod 26. When the saw blade 4 needs to be installed between the adapter 3 and the clamping member 18, turn the operating handle 5. The operating handle 5 drives the cam 6 to rotate. During the rotation of the cam 6, the linkage rod 26 moves downward. The linkage rod 26 drives the clamping member 18 at the lower end to move downward. Then, the clamping member 18 is screwed down. The adapter 3 and the saw blade 4 are then put onto the linkage rod 26 in sequence. The connecting part on the adapter 3 is engaged with the first positioning part on the clamp 2. The engaging part on the saw blade 4 is engaged with the second positioning part on the adapter 3. Then, the clamping member 18 is screwed on. Turn the operating handle 5 in the opposite direction. The operating handle 5 drives the cam 6 to rotate in the opposite direction. During the rotation of the cam 6, the second spring 28 pushes the linkage rod 26 to move the clamping member 18 upward and reset it, so that the clamping member 18, the saw blade 4, the adapter 3 and the clamp 2 are close together, clamping and fixing the saw blade 4. When clamping is required through the clamping seat 2 and the clamping member 18, the stroke of the clamping member 18 screwed into the lower end of the linkage rod 26 is adjusted so that after the adapter 3 is removed, the clamping member 18 can press the saw blade 4 tightly onto the clamping seat 2.
[0052] By providing a connector 3 between the clamping seat 2 and the clamping member 18, a connecting part with the same structure as the mating part of the saw blade 4 corresponding to the first positioning part is provided on the upper end surface of the connector 3, and a second positioning part corresponding to the mating part on another saw blade 4 is provided on the lower end surface of the connector 3. When it is necessary to assemble a saw blade 4 corresponding to the second positioning part, the connector 3 is connected between the clamping seat 2 and the saw blade 4. The connecting part on the connector 3 mates with the first positioning part on the clamping seat 2, and the second positioning part on the connector 3 mates with the mating part on the saw blade 4, so that the saw blade 4 can be assembled. The relative rotation between the saw blade 4, the adapter 3, and the clamp 2 is restricted. At this time, the adapter 3 cooperates with the clamping part 18 to clamp and fix the saw blade 4. When it is necessary to assemble the saw blade 4 corresponding to the first positioning part, the adapter 3 is disassembled, so that the clamp 2 cooperates with the clamping part 18 to clamp and fix the saw blade 4 between the two. The first positioning part on the clamp 2 cooperates with the mating part on the saw blade 4 to restrict the relative rotation between the clamp 2 and the saw blade 4. This structure, by adding an adapter 3, makes the clamping device applicable to the installation of two types of saw blades 4, thereby improving the applicability of the clamping device.
[0053] The clamp 2 is provided with a protruding plug post 24. The plug post 24 is inserted into the opening at the lower end of the output shaft 20 and threadedly connected to the output shaft 20. The clamp 2 rests against the lower end of the output shaft 20.
[0054] The center of the clamp 2 is provided with a first through hole 23 for the lower end of the linkage rod 26 to pass through. The first through hole 23 also plays a guiding and positioning role for the up and down movement of the linkage rod 26. The opening at the upper end of the output shaft 20 is connected to the receiving cavity 12 by a second through hole 25. The upper end of the linkage rod 26 passes through the second through hole 25. The second through hole 25 plays a guiding and positioning role for the up and down movement of the linkage rod 26.
[0055] The lower end face of the clamping member 18 is provided with two disassembly grooves 29 and two disassembly holes, which facilitate the insertion of tools to rotate the clamping member 18, thereby making it easy to install the clamping member 18 onto the linkage rod 26 or remove it from the linkage rod 26.
[0056] The adapter 3 has a second through hole 31, the saw blade 4 has a third through hole 36, and the linkage rod 26 passes through the second through hole 31 and the third through hole 36.
[0057] Figure 9 , Figure 11 As shown, preferably, the first positioning part is a positioning protrusion 22. Multiple positioning protrusions 22 are evenly arranged circumferentially on the lower end face of the clamping seat 2. A corresponding mating part on the saw blade 4 that cooperates with the first positioning part is a positioning hole (e.g., the saw blade 4 disclosed in patent CN215145285U). Multiple positioning holes corresponding to the positioning protrusions 22 surround the third through hole 36 on the saw blade 4. The connecting part is a connecting hole 33 with the same structure as the positioning hole. The upper end face of the adapter 3 is evenly arranged with the same number of connecting holes 33 as the positioning protrusions 22. The connecting holes 33 surround the second through hole 31. The positioning protrusions 22 are inserted into the connecting holes 33 to restrict the relative rotation of the adapter 3 and the clamping seat 2. After the adapter 3 is disassembled, the positioning protrusions 22 on the clamping seat 2 can be directly inserted into the positioning holes on this type of saw blade 4. At this time, the clamping seat 2, in conjunction with the clamping member 18, clamps and fixes the saw blade 4.
[0058] Figure 10 , Figure 12 As shown, the second positioning part is a positioning groove 30. Another type of saw blade 4 has a corresponding mating part that cooperates with the second positioning part, which is a positioning cam 34 (for example, the saw blade 4 disclosed in patent CN210210271U). The positioning cam 34 is inserted into the positioning groove 30 to limit the relative rotation of the saw blade 4 and the adapter 3. The second through hole 31 is opened at the bottom of the positioning groove 30. The third through hole 36 of this type of saw blade 4 is opened at the center of the top end face of the positioning cam 34. The positioning cam 34 is inserted into the positioning groove 30 to limit the relative rotation of the saw blade 4 and the adapter 3.
[0059] Preferably, the positioning cam 34 includes a disc body, and a plurality of protruding teeth 35 are evenly provided on the outer peripheral surface of the disc body. A plurality of tooth grooves 32 corresponding to the protruding teeth 35 are provided on the inner wall of the positioning groove 30. When the disc body is inserted into the positioning groove 30, the protruding teeth 35 are engaged in the tooth grooves 32 to restrict the relative rotation of the adapter 3 and the saw blade 4.
[0060] The above describes the multi-functional saw clamping device adapted to various saw blade installations provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand this utility model and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from its principle, and these improvements and modifications also fall within the protection scope of the claims of this utility model.
Claims
1. A multi-functional saw clamping device adaptable to various saw blade installations, comprising a housing, an output shaft disposed within the housing, and a clamping mechanism for clamping saw blades disposed on the output shaft, characterized in that, The clamping mechanism includes a clamping base, an adapter, and a clamping member. The clamping base has a first positioning part corresponding to a mating part on one type of saw blade. The adapter is located below the clamping base, and a connecting part is provided on the side of the adapter opposite to the clamping base. The connecting part is configured to have the same structure as the mating part of the saw blade corresponding to the first positioning part. The first positioning part cooperates with the connecting part to restrict the relative rotation between the adapter and the clamping base. The clamping member is located below the adapter, and a second positioning part is provided on the side of the adapter opposite to the clamping member, corresponding to a mating part on another type of saw blade. The saw blade is clamped between the adapter and the clamping member. The second positioning part cooperates with the mating part on the saw blade to limit the relative rotation between the saw blade and the adapter. The adapter is designed to be detachable. After the adapter is detached, the clamping base cooperates with the clamping member to clamp and fix the saw blade.
2. The multifunctional saw clamping device for adapting to various saw blade installations according to claim 1, characterized in that The output shaft has openings at both ends and an internal receiving cavity. The clamping seat is fitted onto the lower end of the output shaft. A connecting rod is fixed on the clamping member. The connecting rod passes through the saw blade, the adapter, and the clamping seat, and extends into the receiving cavity from the opening at the lower end of the output shaft. The multi-functional saw clamping device also includes an operating mechanism, an elastic chuck, a first spring, a chuck sleeve, and a linkage rod. The elastic chuck is placed inside the receiving cavity, and the connecting rod is inserted into the elastic chuck. The first spring and the chuck sleeve are both fitted onto the outside of the elastic chuck. One end of the first spring abuts against the bottom wall of the receiving cavity, and the other end of the first spring abuts against the chuck sleeve. The chuck sleeve acts on the elastic chuck to make the spring... The clamping jaws of the chuck clamp the inserted connecting rod. The connecting rod includes a push rod and a top ring. The top ring is fixed to the bottom of the push rod and is located above the chuck sleeve. An output cover is connected to the opening at the upper end of the output shaft. The output cover abuts against the upper limit of the top ring. The upper end of the push rod protrudes from the output cover. The operating mechanism includes a cam and an operating handle. The cam and the operating handle are pivotally connected to the housing. The cam is located above the push rod and is connected to the operating handle. The upper end of the push rod abuts against the cam. When the operating handle drives the cam to rotate, the cam pushes the push rod downward. The top ring pushes the chuck sleeve downward, causing the elastic chuck to release the clamped connecting rod.
3. The multifunctional saw clamping device of claim 2, wherein, The lower end of the output shaft is provided with a downward protruding post, and a first step is formed between the post and the outer wall of the output shaft. The center of the clamp is provided with a first through hole, and the clamp is sleeved on the post and abuts against the first step. The opening at the lower end of the output shaft is opened on the lower end face of the post.
4. The multi-functional saw clamping device for adapting to various saw blade mounting according to claim 1, wherein, The output shaft has openings at both ends and forms a receiving cavity inside. The receiving cavity contains a linkage rod and a second spring. The upper end of the linkage rod extends from the upper opening of the output shaft, and the lower end of the linkage rod extends from the lower opening of the output shaft. The clamp, adapter, and saw blade are all fitted onto the outside of the lower end of the linkage rod. The clamp is fixedly mounted on the lower end of the output shaft. The clamping member is threadedly connected to the lower end of the linkage rod. The linkage rod has an outer ring protrusion. One end of the second spring abuts against the clamp, and the other end of the second spring abuts against the outer ring protrusion. The second spring has an elastic force that pushes the linkage rod upward. The outer ring protrusion abuts against the upper limit of the top cavity wall of the receiving cavity. A cam and an operating handle are pivotally connected to the housing. The cam is located above the linkage rod and connected to the operating handle. The top end of the linkage rod abuts against the cam. When the operating handle drives the cam to rotate, the cam pushes the linkage rod downward, causing the clamping member to move downward and release the clamped saw blade.
5. The multi-functional saw clamping device of claim 4, wherein the first and second saw blade mounting portions are configured to accommodate a plurality of different saw blade mounting configurations. The clamp is provided with a protruding plug post, which is inserted into the opening at the lower end of the output shaft and threadedly connected to the output shaft. The clamp rests against the lower end of the output shaft.
6. The multi-functional saw clamping device adaptable to the installation of various saw blades according to claim 1, characterized in that, The first positioning part is a positioning protrusion. Multiple positioning protrusions are evenly provided on the lower end surface of the clamp along its circumference. The mating part on the saw blade that corresponds to the first positioning part is a positioning hole. The connecting part is a connecting hole with the same structure as the positioning hole. The upper end surface of the adapter is evenly provided with the same number of connecting holes as the positioning protrusions along its circumference. The positioning protrusions are inserted into the connecting holes to restrict the relative rotation of the adapter and the clamp.
7. The multi-functional saw clamping device of claim 1 or 6, wherein, The second positioning part is a positioning groove, and the mating part on the saw blade that corresponds to the second positioning part is a positioning cam. The positioning cam is inserted into the positioning groove to limit the relative rotation of the saw blade and the adapter.
8. The multi-functional saw clamping device adapted to various saw blade mounting according to claim 7, wherein, The positioning cam includes a disc body, on the outer circumferential surface of the disc body are evenly provided with a plurality of protruding teeth, and on the inner wall of the positioning groove are provided a plurality of tooth grooves corresponding to the protruding teeth respectively. When the disc body is inserted into the positioning groove, the protruding teeth are engaged in the tooth grooves.
9. The multi-functional saw clamping device of claim 4, wherein, The lower end face of the clamping member is provided with two disassembly grooves.