Quick dismounting and quick clamping mechanism for swing shovel

Abstract

The utility model relates to a quick dismounting and quick clamping mechanism of a swing shovel, which comprises an output shaft, a head shell, a swing shovel, a clamping piece, a clamping piece and a clamping piece, the output shaft is internally provided with a containing cavity, a limiting hole and an inserting hole which are sequentially communicated from top to bottom, the output shaft is arranged in the head shell, and the lower end of the output shaft extends out of the head shell; the pull rod comprises a main body rod and an eccentric rod which is arranged at the lower end of the main body rod and is eccentrically arranged, the main body rod is arranged in the containing cavity and is connected into the limiting hole in a sliding mode, a coaxial limiting boss is arranged at the lower end of the eccentric rod, and the diameter of the limiting boss is larger than that of the eccentric rod; the pressing plate comprises a pressing block and an insertion column which is arranged at the upper end of the pressing block and matched with the insertion hole, the outer diameter of the pressing block is larger than that of the insertion column, and a connecting hole which is matched with the eccentric rod and the limiting boss and used for limiting movement of the pressing plate is formed in the center of the pressing plate. The beneficial effects of the utility model are that: the installation is very convenient and fast, the structure is simpler, and the later replacement, maintenance and the like are convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to swing shovel technical field, especially in quick dismounting and quick clamping mechanism of swing shovel. BACKGROUND

[0002] The swing shovel, also known as a universal tool, is a multifunctional swing shovel head shell structure reciprocating swing type power tool, which drives the blade connected with the output shaft to make reciprocating motion through the motor in the shell. The swing shovel can realize cutting, polishing, scraping, roughing and polishing and other functions by replacing the blade installed in the head, and is convenient and practical. Cutting is an important function of the swing shovel in use, and is frequently used in woodworking and construction fields. The existing swing shovel generally has a complex structure, and is troublesome to install and maintain. At the same time, the speed is generally constant, and cannot be adjusted according to the specific environment.

[0003] The applicant applied for a utility model patent for the tool quick change and locking mechanism of the multifunctional swing shovel on December 16, 2019, and was granted on September 1, 2020, with the authorization announcement number CN211387721U. It is through rotating the eccentric block, the eccentric block is extruded to the push-pull rod, the push-pull rod moves to the front end of the output shaft, with the movement of the push-pull rod, the locking pin in the locking groove also moves to the front end of the output shaft, with the movement of the locking pin, the locking pin moves from the locking groove to the opening of the sleeve through the transition groove, at this time the locking pin can be freely moved to both sides, the locking force of the pressing plate disappears and the pressing plate begins to fall, due to the damping effect of the first O-ring, the pressing plate can not completely fall, which is convenient for assembling the tool; after the tool is installed, the eccentric block is reset, the spring pushes the push-pull rod to make the locking pin rise into the sleeve, so that the locking pin is collected until it returns to the locking groove, and the locking force generated by the spring and the locking pin on the pressing plate is used to lock the tool.

[0004] However, in the subsequent research and development and use process, it is found that the product has many internal parts and the connection structure is complex, which is not conducive to assembly and later maintenance. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the purpose of the utility model is to provide a quick dismounting and quick clamping mechanism of a swing shovel to solve the above problems.

[0006] The technical scheme of the utility model is as follows: a quick dismounting and quick clamping mechanism of a swing shovel, comprising a head shell, further comprising:

[0007] An output shaft is provided with a containing cavity, a limiting hole and an insertion hole which are sequentially communicated from top to bottom, and the output shaft is arranged in the head shell and the lower end protrudes from the head shell.

[0008] A pull rod, comprising a main rod and an eccentric rod disposed at the lower end of the main rod and eccentrically disposed thereon. The main rod is disposed in a receiving cavity and slidably connected in a limiting hole. The lower end of the eccentric rod is provided with a coaxial limiting boss, the diameter of which is larger than the diameter of the eccentric rod.

[0009] The pressure plate includes a clamping block and an insertion post located on the upper end of the clamping block and engaging with an insertion hole. The outer diameter of the clamping block is larger than the outer diameter of the insertion post. The center of the pressure plate has a connecting hole that engages with an eccentric rod and a limiting boss to restrict the movement of the pressure plate.

[0010] A saw blade, which is disposed between the clamping block and the output shaft.

[0011] By adopting the above technical solution, during installation, the pressure plate first allows the limiting boss to enter the connecting hole, and then the pressure plate moves upward. When the limiting boss is fully inserted into the lower connecting hole, the contact guidance between the outer edge of the upper end of the insertion post and the edge of the insertion hole opening allows the insertion post to easily and smoothly enter the insertion hole. At this time, the eccentric rod and the limiting boss move to one side of the connecting hole. Then, by moving the pull rod upward, one side of the upper end of the limiting boss will press against the step between the lower and upper connecting holes, thereby driving the pressure plate to move upward and clamping the saw blade between the clamping block and the output shaft. When the pressure plate moves upward, the eccentrically set eccentric rod can not only enter the connecting hole, but also press the pressure plate upward against the lower end of the output shaft through the cooperation of the limiting boss and the connecting hole when the eccentric rod moves upward. The pressure plate only needs to be inserted upward, making installation very convenient and easy. At the same time, the pull rod can be integrated into one piece, making the structure simpler and facilitating later replacement and maintenance.

[0012] The present invention is further configured such that: the connecting hole includes an upper connecting hole and a lower connecting hole that are connected to each other; the inner diameter of the lower connecting hole is larger than the inner diameter of the upper connecting hole; the inner diameter of the upper connecting hole is not less than the diameter of the limiting boss; the limiting boss abuts against the upper sidewall of one side of the lower connecting hole; and the connecting hole is coaxial with the main rod.

[0013] By adopting the above technical solution, the limiting boss enters the lower connecting hole through the upper connecting hole. Then, when the insertion post is inserted into the insertion hole, the axis of the pressure plate gradually approaches the axis of the output shaft, causing one side of the limiting boss to move closer to the inner wall of the lower connecting hole. Then, as the pull rod moves upward, a part of the upper side wall of the limiting boss presses against a part of the upper side wall of the upper connecting hole, thereby fixing the pressure plate.

[0014] The present invention is further configured such that: a spring is provided inside the receiving cavity, and a stop block protruding from the outer wall of the main body rod to cooperate with the upper end of the spring.

[0015] By adopting the above technical solution, when a force is applied to press the pull rod down, it will compress the spring through the stop block. When the force is removed, the pull rod moves up under the action of the spring, and drives the pressure plate to press the saw blade tightly against the lower end of the output shaft.

[0016] The present invention is further configured such that: a retaining ring for limiting the retaining block is provided above the retaining block inside the receiving cavity.

[0017] By adopting the above technical solution, the retaining ring can limit the upper side of the stop block, preventing the pull rod from falling out of the receiving cavity.

[0018] The present invention is further configured such that the main rod, eccentric rod, limiting boss and stop block are integrally formed.

[0019] By adopting the above technical solutions, its strength can be increased, its service life can be extended, its structure can be simplified, and the number of parts can be reduced.

[0020] The present invention is further configured such that the distance between the axis of the eccentric rod and the axis of the main rod is 0.7-1.3mm.

[0021] By adopting the above technical solution, the pressure plate can be effectively driven to press the saw blade tightly against the lower end of the output shaft, resulting in higher stability.

[0022] The present invention is further configured such that the lower opening edge of the insertion hole is chamfered.

[0023] By adopting the above technical solution, when the pressure plate moves upward, the chamfer will contact and guide the upper outer edge of the insertion post, thereby guiding the insertion post into the insertion hole, making the insertion of the insertion post easier and smoother, and the eccentric rod and the limiting boss can move to one side of the connection hole.

[0024] The present invention is further configured such that: a wrench is rotatably connected to the head shell, the wrench is provided with an eccentric block, and the upper end of the main body rod extends upward into the receiving cavity to cooperate with the eccentric block.

[0025] By adopting the above technical solution, the main rod is pressed down by rotating the wrench to drive the eccentric block.

[0026] The present invention is further configured such that the pressure plate is made of metal.

[0027] By adopting the above technical solution, the metal pressure plate can effectively and stably apply force to the upper side of the clamping block, making the clamping of the saw blade more stable. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is an exploded view of the structure of this utility model;

[0030] Figure 2 This is a cross-sectional view of the structure of this utility model;

[0031] Figure 3 This is a schematic diagram of the tie rod in this utility model;

[0032] Figure 4 This is a bottom view of the structure of this utility model;

[0033] Figure 5 This is a schematic diagram of the structure and operation of this utility model. Figure 1 ;

[0034] Figure 6 This is a schematic diagram of the structure and operation of this utility model. Figure 2 ;

[0035] Figure 7 This is a schematic diagram of the structure and operation of this utility model. Figure 3 ;

[0036] Figure 8 This is a schematic diagram of the structure and operation of this utility model. Figure 4 ;

[0037] Figure 9 This is a schematic diagram of the structure and operation of this utility model. Figure 5 . Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] like Figures 1-9 As shown, this utility model discloses a quick disassembly and quick clamping mechanism for a swing shovel, including a head shell 1, and further comprising:

[0040] Output shaft 2, wherein the output shaft 2 is provided with a receiving cavity 20, a limiting hole 21 and an insertion hole 22 connected sequentially from top to bottom, the output shaft 2 is disposed inside the head shell 1 and the lower end extends out of the head shell 1;

[0041] The pull rod 3 includes a main rod 30 and an eccentric rod 31 disposed at the lower end of the main rod 30 and eccentrically disposed thereon. The main rod 30 is disposed in the receiving cavity 20 and slidably connected in the limiting hole 21. The lower end of the eccentric rod 31 is provided with a coaxial limiting boss 32. The diameter of the limiting boss 32 is larger than the diameter of the eccentric rod 31.

[0042] The pressure plate 4 includes a pressing block 40 and an insertion post 41 located on the upper end of the pressing block 40 and cooperating with the insertion hole 22. The outer diameter of the pressing block 40 is larger than the outer diameter of the insertion post 41. The center of the pressure plate 4 is provided with a connecting hole 42 that cooperates with the eccentric rod 31 and the limiting boss 32 to restrict the movement of the pressure plate 4.

[0043] Saw blade 5, which is disposed between clamping block 40 and output shaft 2.

[0044] By adopting the above technical solution, during installation, the pressure plate 4 first allows the limiting boss 32 to enter the connecting hole 42. Then, the pressure plate 4 moves upward. When the limiting boss 32 is fully inserted into the lower connecting hole 421, the contact guidance between the outer edge of the upper end of the insertion post 41 and the opening edge of the insertion hole 22 allows the insertion post 41 to easily and smoothly enter the insertion hole 22. At this time, the eccentric rod 31 and the limiting boss 32 move to one side of the connecting hole 42. Then, by moving the pull rod 3 upward, one side of the upper end of the limiting boss 32 will press against the lower connecting hole. On the step between 421 and the upper connecting hole 420, the pressure plate 4 moves upward and clamps the saw blade 5 between the clamping block 40 and the output shaft 2. When the pressure plate moves upward, the eccentric rod 31 can not only enter the connecting hole 42, but also press the pressure plate 4 upward against the lower end of the output shaft 2 through the cooperation of the limiting boss 32 and the connecting hole 42. The pressure plate 4 only needs to be inserted upward, which is very convenient and easy to install. At the same time, the integrated design of the pull rod 3 makes the structure simpler and facilitates later replacement and maintenance.

[0045] In this embodiment of the utility model, the connecting hole 42 includes an upper connecting hole 420 and a lower connecting hole 421 that are connected. The inner diameter of the lower connecting hole 421 is larger than the inner diameter of the upper connecting hole 420. The inner diameter of the upper connecting hole 420 is not less than the diameter of the limiting boss 32. The limiting boss 32 abuts against the upper sidewall of one side of the lower connecting hole 421. The connecting hole 42 is coaxial with the main body rod 30.

[0046] By adopting the above technical solution, the limiting boss 32 enters the lower connecting hole 421 through the upper connecting hole 420. Then, when the insertion post 41 is inserted into the insertion hole 22, the axis of the pressure plate 4 gradually approaches the axis of the output shaft 2, causing one side of the limiting boss 32 to move closer to the inner wall of the lower connecting hole 421. Then, as the pull rod 3 moves upward, a part of the upper side wall of the limiting boss 32 presses against a part of the upper side wall of the upper connecting hole 420, thereby fixing the pressure plate 4.

[0047] In this embodiment of the utility model, a spring 6 is provided inside the receiving cavity 20, and a stop block 33 that cooperates with the upper end of the spring 6 is protruding from the outer wall of the main body rod 30.

[0048] By adopting the above technical solution, when a force is applied to press down the pull rod 3, it will compress the spring 6 through the stop block 33. When the force is removed, the pull rod 3 moves up under the action of the spring 6, and drives the pressure plate 4 to press the saw blade 5 tightly against the lower end of the output shaft 2.

[0049] In this embodiment of the present invention, the receiving cavity 20 is provided with a retaining ring 7 above the stop 33 for limiting the stop 33.

[0050] By adopting the above technical solution, the retaining ring 7 can limit the upper side of the retaining block 33 to prevent the pull rod 3 from falling out of the receiving cavity 20.

[0051] In this embodiment of the utility model, the main rod 30, the eccentric rod 31, the limiting boss 32 and the stop block 33 are integrally formed.

[0052] By adopting the above technical solutions, its strength can be increased, its service life can be extended, its structure can be simplified, and the number of parts can be reduced.

[0053] In this embodiment of the utility model, the distance between the axis of the eccentric rod 31 and the axis of the main rod 30 is set to 0.7-1.3mm.

[0054] By adopting the above technical solution, the pressure plate 4 can effectively press the saw blade 5 against the lower end of the output shaft 2, resulting in higher stability.

[0055] In this embodiment of the invention, the lower opening edge of the insertion hole 22 is chamfered.

[0056] By adopting the above technical solution, when the pressure plate 4 moves upward, the chamfer will contact and guide the upper outer edge of the insertion post 41, thereby guiding the insertion post 41 into the insertion hole 22, making the insertion of the insertion post 41 easier and smoother, and the eccentric rod 31 and the limiting boss 32 can move to one side of the connection hole 42.

[0057] In this embodiment of the utility model, a wrench 10 is rotatably connected to the head shell 1, and an eccentric block 11 is provided on the wrench 10. The upper end of the main body rod 30 extends upward into the receiving cavity 20 and cooperates with the eccentric block 11.

[0058] By adopting the above technical solution, the main body rod 30 is pressed down by rotating the wrench 10 to drive the eccentric block 11.

[0059] In this embodiment of the utility model, the pressure plate 4 is made of metal.

[0060] By adopting the above technical solution, the metal pressure plate 4 can effectively and stably apply the force to the upper side of the clamping block 40, making the clamping of the saw blade 5 more stable.

[0061] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A quick disassembly and quick clamping mechanism for a swing shovel, comprising a head shell (1), characterized in that, Also includes: Output shaft (2), the output shaft (2) is provided with a receiving cavity (20), a limiting hole (21) and an insertion hole (22) connected from top to bottom, the output shaft (2) is located in the head shell (1) and the lower end extends out of the head shell (1); A pull rod (3) includes a main rod (30) and an eccentric rod (31) disposed at the lower end of the main rod (30) and eccentrically disposed thereon. The main rod (30) is disposed in the receiving cavity (20) and slidably connected in the limiting hole (21). The lower end of the eccentric rod (31) is provided with a coaxial limiting boss (32). The diameter of the limiting boss (32) is larger than the diameter of the eccentric rod (31). The pressure plate (4) includes a clamping block (40) and an insertion post (41) located on the upper end of the clamping block (40) and cooperating with the insertion hole (22). The outer diameter of the clamping block (40) is larger than the outer diameter of the insertion post (41). The center of the pressure plate (4) is provided with a connecting hole (42) that cooperates with the eccentric rod (31) and the limiting boss (32) to restrict the movement of the pressure plate (4). The saw blade (5) is located between the clamping block (40) and the output shaft (2).

2. The quick disassembly and quick clamping mechanism for a swing shovel according to claim 1, characterized in that, The connecting hole (42) includes an upper connecting hole (420) and a lower connecting hole (421) that are connected. The inner diameter of the lower connecting hole (421) is larger than the inner diameter of the upper connecting hole (420). The inner diameter of the upper connecting hole (420) is not less than the diameter of the limiting boss (32). The limiting boss (32) abuts against the upper sidewall of one side of the lower connecting hole (421). The connecting hole (42) is coaxial with the main rod (30).

3. The quick disassembly and quick clamping mechanism for a swing shovel according to claim 1, characterized in that, The cavity (20) is provided with a spring (6), and the outer wall of the main rod (30) is provided with a stop (33) that cooperates with the upper end of the spring (6).

4. The quick disassembly and quick clamping mechanism for a swing shovel according to claim 3, characterized in that, The receiving cavity (20) is provided with a retaining ring (7) above the stop (33) for limiting the stop (33).

5. The quick disassembly and quick clamping mechanism for a swing shovel according to claim 3, characterized in that, The main body rod (30), eccentric rod (31), limiting boss (32) and stop block (33) are integrally formed.

6. The quick disassembly and quick clamping mechanism for a swing shovel according to claim 1, characterized in that, The distance between the axis of the eccentric rod (31) and the axis of the main rod (30) is set to 0.7-1.3mm.

7. The quick disassembly and quick clamping mechanism for a swing shovel according to claim 1, characterized in that, The lower opening edge of the insertion hole (22) is chamfered.

8. The quick disassembly and quick clamping mechanism for a swing shovel according to claim 1, characterized in that, A wrench (10) is rotatably connected to the head shell (1), and an eccentric block (11) is provided on the wrench (10). The upper end of the main body rod (30) extends upward into the receiving cavity (20) and cooperates with the eccentric block (11).

9. The quick disassembly and quick clamping mechanism for a swing shovel according to claim 1, characterized in that, The pressure plate (4) is made of metal.

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