Locking structure and multifunctional saw with saw blade convenient to replace

Abstract

The utility model discloses a locking structure, belongs to the field of electric saws, solves the problem of low saw blade replacement efficiency, and adopts the technical scheme that a pin hole is formed in a moving part, a through hole is formed in the side wall of the pin hole, and a locking part is arranged in the through hole in a penetrating manner; a moving space is formed in the outer sleeve part in a penetrating mode in the first direction, a second containing space is formed in the side wall of the moving space, the moving part is in sliding fit with the moving space in the first direction, and switching between a locking state and a loosening state is achieved through relative sliding of the moving part relative to the outer sleeve part; the pin shaft and the pin hole are matched in an inserted mode in the first direction, and a first containing space is formed in the pin shaft; the locking structure has the advantages that the saw blade is convenient to disassemble and replace through the quick disassembly of the lock pin, the production and processing efficiency is improved, and in addition, the utility model further discloses a multifunctional saw convenient to replace the saw blade, and the multifunctional saw comprises the locking structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electric saws, in particular to a locking structure and a multifunctional saw facilitating replacement of a saw blade. BACKGROUND

[0002] During production activities, an electric saw is a common and frequently used electric tool for cutting materials, and a saw blade is a part of the electric saw, and the cutting of materials is realized through reciprocating movement of the saw blade.

[0003] Since the saw blade needs to be in contact with materials for a long time, the wear rate is high, and therefore the saw blade needs to be replaced frequently. The existing saw blade mounting method of the electric saw is complex, which results in low efficiency of replacing the saw blade and affects the production and processing efficiency. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the above problems, the present application provides a locking structure and a multifunctional saw facilitating replacement of a saw blade.

[0005] The locking structure provided by the present application adopts the following technical scheme:

[0006] The locking structure has two assembly states of a locking state and a release state, and comprises:

[0007] A moving part is provided with a pin hole, a through hole is formed in the side wall of the pin hole, and a locking part is arranged in the through hole;

[0008] An outer sleeve part is provided with a moving space along a first direction, a second accommodating space is formed in the side wall of the moving space, and the moving part is slidably connected with the moving space along the first direction, and the locking state and the release state are switched by relative sliding of the moving part relative to the outer sleeve part;

[0009] A pin shaft is inserted and connected with the pin hole along the first direction, and a first accommodating space is formed in the pin shaft;

[0010] An elastic part is fixedly connected between the moving part and the outer sleeve part along the first direction, and the elastic potential energy of the elastic part in the locking state is less than the elastic potential energy of the elastic part in the release state;

[0011] Wherein:

[0012] In the locking state, the locking part is located in the through hole and the first accommodating space, and the locking part abuts against the side wall of the moving space to limit the relative sliding of the pin shaft and the moving part along the first direction;

[0013] In the release state, the locking part is located in the through hole and the second accommodating space to release the restriction on the sliding of the pin shaft relative to the moving part.

[0014] Further preferably, the locking member is a steel ball.

[0015] and / or

[0016] The first accommodating space and the second accommodating space are both arc-shaped grooves in profile projection in the first vertical direction.

[0017] Further preferably, in the assembled state, the first accommodating space and the second accommodating space are both annular grooves, and the annular center line of the annular groove extends in the same direction as the first direction.

[0018] Further preferably, the pin hole side wall is provided with two or more through holes, and each through hole is provided with a locking member, and in the assembled state, the through holes are arranged in an annular array with the straight line in the first direction as the center line.

[0019] The application also provides a multifunctional saw with a replaceable saw blade, comprising a housing, a saw blade, and a locking structure, wherein the locking structure is as described above, the outer sleeve is rotatably installed in the housing, and the rotation axis of the outer sleeve is consistent with the first direction.

[0020] In the locked state, the pin shaft presses the saw blade against the axial end of the outer sleeve, so that the saw blade rotates with the outer sleeve.

[0021] Further preferably, the axial end of the outer sleeve has a positioning column, and the saw blade is provided with a positioning hole, and in the locked state, the positioning column and the positioning hole are connected in plug-in fit.

[0022] Further preferably, the housing is provided with a movable trigger that drives the moving member to slide axially along the outer sleeve.

[0023] The movable trigger comprises a cam rotatably installed on the housing, and the cam is used to abut and push the moving member to slide.

[0024] The cam has a flat surface, and when the locking structure is in the relaxed state, the moving member abuts against the flat surface, and the flat surface is perpendicular to the first direction.

[0025] Further preferably, the housing is provided with a motor, and the motor is provided with a gear box connected to the outer sleeve.

[0026] Further preferably, the output shaft of the motor and the gear box are connected by a ball bearing and two support bearings, and the ball bearing is located between the two support bearings.

[0027] Further preferably, the housing is also provided with a heat dissipation member, and the heat dissipation member is located between the motor and the gear box.

[0028] In summary, the present application includes the following at least advantages:

[0029] 1. In the locked state, the locking member is moved out of the through hole and the first accommodating space and moved into the through hole and the second accommodating space by moving the moving member relative to the outer sleeve, and the sliding restriction on the pin shaft is released, so that the pin shaft can be detached from the moving member for replacement, which is simple, convenient and fast. When the locking structure is applied to the multifunctional saw, the locking pin is used to fix the saw blade, and the locking pin is used to fix the saw blade, which facilitates the disassembly and replacement of the saw blade and improves the production and processing efficiency.

[0030] 2. The output shaft of the motor is fixed by the double support bearing fixing structure, which can better fix and support the ball bearing and enhance the structural reliability.

[0031] 3. The heat dissipation member is arranged between the gear box and the motor, which can simultaneously dissipate heat from the gear box and the motor, and reduce the probability of overheating of the electric saw. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a schematic view of the locking structure along the first direction;

[0033] Figure 2 is a schematic view of the locking structure in an exploded structure;

[0034] Figure 3 is a schematic view of the moving member in a three-dimensional structure;

[0035] Figure 4 is a schematic view of the multifunctional saw in a locked state;

[0036] Figure 5 is a schematic view of the multifunctional saw in a relaxed state;

[0037] Figure 6 is a schematic view of the multifunctional saw in a locked state;

[0038] Figure 7 is a schematic view of the multifunctional saw in a relaxed state;

[0039] Figure 8 is Figure 7 is a partial enlarged view of A in FIG. 8;

[0040] Figure 9 is a schematic view of the movable trigger structure;

[0041] BRIEF DESCRIPTION OF DRAWINGS

[0042] 1. Housing; 2. Saw blade; 3. Positioning pin; 4. Positioning hole; 5. Movable trigger; 6. Cam; 7. Plane; 8. Motor; 9. Gearbox; 10. Ball bearing; 11. Support bearing; 12. Heat sink; 13. Moving part; 14. Abutment part; 15. Moving body; 16. Pin hole; 17. Through hole; 18. Locking part; 19. Pin shaft; 20. First receiving space; 21. Outer sleeve; 22. Moving space; 23. Elastic element; 24. Second receiving space; 100. Locking structure. Detailed Implementation

[0043] The specific embodiments of this utility model are described in detail below. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0044] In this utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the orientation in the assembled and used state. "Inner" and "outer" refer to the inner and outer sides relative to the outline of each component itself.

[0045] This utility model discloses a locking structure, as shown in the attached figure. Figure 1 Appendix Figure 2 As shown, the locking structure 100 includes a movable member 13, a locking pin, an outer sleeve 21, a locking member 18, and an elastic member 23, and has two assembly states: a locked state and a relaxed state. Specifically, the movable member 13 has a pin hole 16, and a through hole 17 is formed on the side wall of the pin hole 16, through which the locking member 18 passes. The outer sleeve 21 has a moving space 22 extending along a first direction, and a second receiving space 24 is formed on the side wall of the moving space 22. The movable member 13 slides in the moving space 22 along the first direction, and the switching between the locked and relaxed states is achieved by the relative sliding of the movable member 13 relative to the outer sleeve 21. The pin 19 is inserted into the pin hole 16 along the first direction, and a first receiving space 20 is formed on the pin 19. The elastic member 23 is fixedly connected between the movable member 13 and the outer sleeve 21 along the first direction, and the elastic potential energy of the elastic member 23 in the locked state is less than that in the relaxed state. In the locked state, the locking member 18 is located in the through hole 17 and the first receiving space 20 and abuts against the side wall of the moving space 22 to restrict the pin 19 and the moving member 13 from sliding relative to each other in the first direction. In the unlocked state, the locking member 18 is located in the through hole 17 and the second receiving space 24 to release the restriction on the sliding of the pin 19 relative to the moving member 13.

[0046] In the embodiment, the first direction is a vertical direction. The moving piece 13 is provided with a downwardly open pin hole 16. The pin shaft 19 can be inserted into the pin hole 16 when the pin shaft 19 moves upwardly, and the pin shaft 19 can be separated from the pin hole 16 when the pin shaft 19 moves downwardly. The moving space 22 is vertically and throughly provided in the outer sleeve 21. The moving piece 13 and the outer sleeve 21 are vertically and slidingly connected. The elastic piece 23 is a spring and is fixedly connected between the upper end of the outer sleeve 21 and the upper end of the moving piece 13. From outside to inside along the first direction, the outer sleeve 21, the moving piece 13 and the pin shaft 19 are sequentially arranged.

[0047] When the locking structure 100 is in the locking state, the locking piece 18 is located in the through hole 17 and the first accommodating space 20 and abuts against the side wall of the moving space 22, that is, the locking piece 18 limits the sliding of the pin shaft 19 in the vertical direction. When a downward force is applied to the locking piece 18, the locking piece 18 is still located in the through hole 17 and the first accommodating space 20 due to the abutting effect of the side wall of the moving space 22 on the locking piece 18. At this time, the pin shaft 19 drives the locking piece 18 and the moving piece 13 to move downwardly relative to the outer sleeve 21 against the elastic force of the elastic piece 23. The moving piece 13 moves downwardly relative to the outer sleeve 21, which is the process of switching from the locking state to the releasing state. When the releasing state is not reached, the pin shaft 19 and the moving piece 13 remain in a relatively static state, that is, the locking state of the pin shaft 19 is maintained.

[0048] When the pin shaft 19 or the moving piece 13 is subjected to a downward external force and moves downwardly relative to the outer sleeve 21 against the elastic force of the elastic piece 23 until the locking piece 18 is opposite to the second accommodating space 24, the side wall of the moving space 22 loses the abutting effect on the locking piece 18. At this time, when a downward force is applied to the pin shaft 19, the pin shaft 19 drives the locking piece 18 to move out of the first accommodating space 20 and into the through hole 17 and the second accommodating space 24 due to the loss of the abutting limitation of the side wall of the moving space 22 on the locking piece 18. When the locking piece 18 is completely moved out of the first accommodating space 20 and into the through hole 17 and the second accommodating space 24, the locking piece 18 releases the limitation on the pin shaft 19. At this time, the pin shaft 19 can slide downwardly relative to the moving piece 13 and finally completely separate from the moving piece 13.

[0049] In summary, the design of the above-mentioned locking structure 100 is simple, convenient and fast in the process of taking the pin shaft 19 out of the moving piece 13 in the locking state.

[0050] In addition, since the elastic potential energy of the elastic member 23 is greater in the relaxed state than in the locked state, the elastic member 23 has an acting force to drive the moving member 13 to move upward relative to the outer sleeve member 21 when the locking structure 100 is in the relaxed state. When the moving member 13 moves upward relative to the outer sleeve member 21, the locking member 18 is driven to move out of the second accommodating space 24 and into the first accommodating space 20 until the locking member 18 is located in the through hole 17 and the first accommodating space 20 and abuts against the side wall of the moving space 22, thereby relocking the pin shaft 19.

[0051] In the embodiment, the locking structure 100 is combined with the outer sleeve member 21, the moving member 13, the pin shaft 19, the elastic member 23, the locking member 18, the first accommodating space 20, the second accommodating space 24, and the moving space 22. Figure 3 The moving member 13 includes a T-shaped abutting portion 14 and an inverted T-shaped moving body 15. The abutting portion 14 is threadedly connected with the moving body 15 and makes the whole moving member 13 in the shape of an I-beam. During installation, the moving body 15 is inserted into the moving space 22 from below and upward from below the outer sleeve member 21, and the horizontal portion of the inverted T shape abuts against the lower end of the outer sleeve member 21, avoiding the moving body 15 from being completely inserted into the moving space 22, thereby limiting the upper limit position of the sliding of the moving member 13 relative to the outer sleeve member 21. The upper end of the moving body 15 passes out of the upper side of the outer sleeve member 21 and is threadedly connected with the abutting portion 14. The T-shaped abutting portion 14 is convenient for the installation of the elastic member 23 and is convenient for the application of external force to the moving member 13.

[0052] In some embodiments, the locking member 18 is in the form of a steel ball to reduce the jamming of the locking member 18 during the switching between the locked state and the relaxed state. Alternatively, the first accommodating space 20 and the second accommodating space 24 can be designed in the form of cross section, and the profile projections of the first accommodating space 20 and the second accommodating space 24 in the vertical first direction are both in the shape of an arcuate groove, which can also reduce the occurrence of the jamming of the locking member 18. Of course, in other embodiments, the steel ball type locking member 18 can be combined with the arcuate groove type first accommodating space 20 and second accommodating space 24.

[0053] In some embodiments, the first accommodating space 20 and the second accommodating space 24 are both in the form of a ring groove, and the extending direction of the ring center line of the ring groove is consistent with the first direction. The design of the ring groove can eliminate the installation requirements of the outer sleeve member 21, the moving member 13, and the pin shaft 19 in the horizontal circumferential direction. That is, the relative rotation of the outer sleeve member 21 and the moving member 13 in the horizontal circumferential direction will not affect the installation between the outer sleeve member 21 and the moving member 13. Similarly, the relative rotation of the moving member 13 and the pin shaft 19 in the horizontal circumferential direction will not affect the installation between the moving member 13 and the pin shaft 19.

[0054] In some embodiments, two or more through holes 17 are formed in the side wall of the pin hole 16, and a locking member 18 is arranged in each through hole 17. In the assembled state, the through holes 17 are arranged in a ring array with the straight line in the first direction as the center line. The ring array design is convenient for processing, and can ensure the angular momentum balance of the moving member 13 when a horizontal circumferential rotation occurs.

[0055] The utility model also provides a multifunctional saw convenient to replace saw blade, combine with the attached Figure 4 to the attached Figure 8 As shown in the figure, the multifunctional saw comprises a shell 1, a saw blade 2 and the above-mentioned locking structure 100. The outer sleeve 21 in the locking structure 100 is rotatably installed in the shell 1, and the rotation axis of the outer sleeve 21 is consistent with the first direction. Specifically, the outer sleeve 21 is in the shape of a shaft, and the rotation axis is consistent with the axis of the shaft, ensuring the angular momentum balance of the outer sleeve 21. In addition, in the locked state, the pin shaft 19 presses the saw blade 2 against the axial end of the outer sleeve 21, so that the saw blade 2 rotates with the outer sleeve 21.

[0056] In this embodiment, the pin shaft 19 is in the shape of an inverted T, the horizontal part abuts against the lower end of the saw blade 2, and in the locked state, the saw blade 2 is pressed against the lower end of the outer sleeve 21.

[0057] When the locking structure 100 is in the relaxed state, the pin shaft 19 releases the pressing action on the saw blade 2, and after the pin shaft 19 is separated from the locking structure 100, the saw blade 2 can be replaced, which is simple, convenient and fast, and improves the production and processing efficiency.

[0058] In some embodiments, the axial end of the outer sleeve 21 has a positioning column 3, and the saw blade 2 has a positioning hole 4, and in the locked state, the positioning column 3 and the positioning hole 4 are connected in plug-in fit. The plug-in fit of the positioning column 3 and the positioning hole 4 improves the reliability of the rotation of the saw blade 2 with the outer sleeve 21.

[0059] In some embodiments, the shell 1 is provided with a movable trigger 5 for driving the moving member 13 to slide along the axial direction of the outer sleeve 21. Combine with the attached Figure 9As shown, the movable trigger 5 comprises a sliding cam 6 rotatably mounted on the housing 1 and used to abut the pushing moving piece 13. The cam 6 has a flat surface 7, and when the locking structure 100 is in the relaxed state, the moving piece 13 abuts against the flat surface 7, and the flat surface 7 is perpendicular to the first direction. Specifically, the abutting portion 14 on the moving piece 13 is used to abut against the cam 6. Since the elastic potential energy of the elastic member 23 in the relaxed state is greater than that in the locked state, the switching of the locking structure 100 from the relaxed state to the locked state is driven by the elastic force of the elastic member 23, and the saw blade 2 needs to be replaced in the relaxed state, so the locking structure 100 needs to be kept in the relaxed state for a period of time. Therefore, the flat surface 7 on the cam 6 is designed such that the elastic force of the elastic member 23 in the relaxed state is perpendicular to the flat surface 7, and the movable trigger 5 can be kept in the relaxed state without manual control.

[0060] In some embodiments, the multifunctional saw further comprises a motor 8 fixedly mounted in the housing 1, and a gear box connected to the outer sleeve 21 is mounted on the motor 8. The power input end of the gear box 9 is connected to the output shaft of the motor 8, and the power output end of the gear box 9 is connected to the outer sleeve 21. Through the gear transmission design in the gear box 9, the motor 8 drives the reciprocating rotation of the outer sleeve 21, thereby realizing the reciprocating swinging cutting action of the saw blade 2.

[0061] In some embodiments, a ball bearing 10 is connected between the output shaft of the motor 8 and the gear box 9, and two support bearings 11 are connected between the ball bearing 10 and the gear box 9 to improve stability.

[0062] In some embodiments, a heat dissipation member 12 is arranged between the motor 8 and the gear box 9 in the housing 1. In this embodiment, the heat dissipation member 12 is a blade type heat dissipation member for heat dissipation of the motor 8 and the gear box 9.

[0063] The replacement saw blade step of the multifunctional saw with a replaceable saw blade is as follows:

[0064] The movable trigger 5 is rotated counterclockwise, the cam 6 pushes the moving piece 13 to move the locking piece 18 and the pin shaft 19 downward relative to the outer sleeve 21 against the elastic force of the elastic member 23, until the through hole 17 is aligned with the second accommodating space 24, at this time the flat surface 7 of the cam 6 abuts against the upper end of the moving piece 13, at this time the movable trigger 5 can be released.

[0065] The pin shaft 19 is pulled downward, the pin shaft 19 pushes the locking piece 18 into the through hole 17 and the second accommodating space 24, so that the locking piece 18 no longer limits the pin shaft 19 in the vertical direction, thereby pulling out the pin shaft 19 from the moving piece 13, at this time the saw blade 2 can be removed and replaced.

[0066] After replacing the saw blade 2, the pin shaft 19 is inserted into the pin hole 16 from bottom to top until the first accommodating space 20 is opposite to the through hole 17. At this time, the movable trigger 5 is reset by rotating clockwise, the moving piece 13 slides upward under the elastic force of the elastic piece 23, and the locking piece 18 is taken out from the second accommodating space 24, so that the locking piece 18 is partially located in the first accommodating space 20. At this time, the moving piece 13 continues to move upward, so that the locking piece 18 is completely located in the through hole 17 and the first accommodating space 20 and abuts against the side wall of the moving space 22.

[0067] The preferred embodiments of the present application are described in detail above, but the present application is not limited to the specific details in the above embodiments, and various simple modifications can be made to the technical solutions of the present application within the technical concept of the present application, and these simple modifications all belong to the protection scope of the present application.

[0068] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present application will not further describe various possible combinations.

[0069] In addition, various different embodiments of the present application can also be combined in any manner, as long as they do not deviate from the technical concept of the present application, and they should also be considered as disclosed content of the present application.

Claims

1. A locking structure (100) having two assembly states, a locked state and a released state, characterized in that, The locking structure comprises: a moving piece (13) provided with a pin hole (16) and a through hole (17) formed in the side wall of the pin hole (16), and a locking piece (18) inserted into the through hole (17); an outer sleeve (21) provided with a moving space (22) extending in a first direction, and a second accommodating space (24) formed in the side wall of the moving space (22), wherein the moving piece (13) is slidably connected with the moving space (22) in the first direction, and the relative sliding between the moving piece (13) and the outer sleeve (21) can switch the locking structure between a locked state and a released state; a pin shaft (19) inserted into the pin hole (16) in the first direction, and provided with a first accommodating space (20); a resilient piece (23) fixedly connected between the moving piece (13) and the outer sleeve (21) in the first direction, and having a smaller elastic potential energy in the locked state than in the released state; wherein: in the locked state, the locking piece (18) is located in the through hole (17) and the first accommodating space (20), and abuts against the side wall of the moving space (22) to limit the relative sliding between the pin shaft (19) and the moving piece (13) in the first direction; in the released state, the locking piece (18) is located in the through hole (17) and the second accommodating space (24) to release the limitation on the sliding of the pin shaft (19) relative to the moving piece (13).

2. The locking structure (100) according to claim 1, characterized in that The locking piece (18) is a steel ball; and / or The first accommodating space (20) and the second accommodating space (24) are both arc-shaped grooves in the profile projection in the direction perpendicular to the first direction.

3. The locking structure (100) according to claim 2, characterized in that In the assembled state, the first accommodating space (20) and the second accommodating space (24) are both annular grooves, and the annular center line of the annular groove extends in the same direction as the first direction.

4. The locking structure (100) according to any one of claims 1 to 3, characterized in that The side wall of the pin hole (16) is provided with two or more through holes (17), and each through hole (17) is provided with one locking piece (18), and in the assembled state, the through holes (17) are arranged in an annular array with the straight line in the first direction as the center line.

5. A multi-functional saw which facilitates replacement of a saw blade, comprising a housing (1), a saw blade (2) and a locking structure, characterized in that, The locking structure adopts the locking structure (100) of any one of claims 1 to 4, and the outer sleeve (21) is rotatably installed in the housing (1), and the rotation axis of the outer sleeve (21) is consistent with the first direction; wherein, in the locked state, the pin shaft (19) presses the saw blade (2) against one axial end of the outer sleeve (21) to make the saw blade (2) rotate with the outer sleeve (21).

6. The multi-functional saw of claim 5, wherein, One axial end of the outer sleeve (21) is provided with a positioning column (3), and the saw blade (2) is provided with a positioning hole (4), and in the locked state, the positioning column (3) is connected with the positioning hole (4) in the form of insertion fit.

7. The multi-functional saw of claim 5, wherein, The housing (1) is provided with a movable trigger (5) for driving the moving piece (13) to slide along the outer sleeve (21) in the axial direction. The active trigger (5) comprises a cam (6) rotatably installed on the shell (1), and the cam (6) is used for abutting and pushing the moving part (13) to slide; The cam (6) is provided with a flat surface (7), and when the locking structure is in a relaxed state, the moving part (13) abuts against the flat surface (7), and the flat surface (7) is perpendicular to the first direction.

8. The multi-functional saw of claim 5, wherein, The shell (1) is provided with a motor (8), and the motor (8) is provided with a gear box (9) connected with the outer sleeve (21).

9. The multi-functional saw of claim 8, wherein, The output shaft of the motor (8) is connected with the gear box (9) through a ball bearing (10) and two support bearings (11), and the ball bearing (10) is located between the two support bearings (11).

10. The multi-functional saw of claim 8, wherein, The shell (1) is further provided with a heat dissipation part (12), and the heat dissipation part (12) is arranged between the motor (8) and the gear box (9).

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