Saw blade replacing structure of arc-shaped reciprocating saw

Abstract

The utility model relates to the technical field of reciprocating saws, in particular to a saw blade replacement structure of an arc-shaped reciprocating saw, which comprises a connecting rod, a chuck and a binding component, the chuck is fixedly connected with the side surface of the connecting rod, the binding component is arranged on the surface of the chuck and comprises a main bayonet lock, and a guide cavity is arranged on the arc surface of the chuck. The main bayonet lock is slidably connected with the inner wall of the guide cavity, the inner wall of the guide cavity is slidably connected with an auxiliary bayonet lock, the surfaces of the main bayonet lock and the auxiliary bayonet lock are fixedly connected with force carrying plates, the side surfaces of the force carrying plates are fixedly connected with compression springs, the side surface of the main bayonet lock is provided with an insertion hole, and the auxiliary bayonet lock is inserted into the inner wall of the insertion hole. According to the utility model, through the arrangement of the binding assembly and the auxiliary assembly, the stroke of the bayonet lock of the replacement structure is shortened, the problem that the reset structure is easy to be blocked when a single torsional spring is adopted as a reset piece is reduced, and the stability of the replacement structure is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of reciprocating saws, in particular to a saw blade replacement structure of an arc-shaped reciprocating saw. Background Art

[0002] A reciprocating saw is a device that uses reciprocating motion to drive the saw blade for cutting. In the process of cutting materials such as boards, a reciprocating saw is often required to cut the materials.

[0003] The inventor discovered in his daily work that in the process of using the replacement structure, the existing replacement structure mostly uses a single-sided pin to limit the saw blade, which makes the required moving stroke of the pin longer when designing, and causes the chuck diameter of the replacement structure to become larger, and the required installation space to increase. At the same time, the existing rotating structure only uses a single torsion spring for reset, resulting in an error in the torsional force exerted on the rotating structure when the structure is reset, which makes it easy for the structure to get stuck when it is reset. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art that a single-sided latch is used to limit the saw blade, which requires a long moving stroke when designing the latch, causes the chuck diameter of the replacement structure to become larger, and increases the required installation space, and proposes a saw blade replacement structure for an arc reciprocating saw.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a saw blade replacement structure for an arc-shaped reciprocating saw, comprising a connecting rod, a chuck and a restraining assembly, wherein the chuck is fixedly connected to the side surface of the connecting rod, the restraining assembly is arranged on the surface of the chuck, the restraining assembly comprises a main latch, a guide cavity is opened on the arc surface of the chuck, the main latch is slidably connected to the inner wall of the guide cavity, and the inner wall of the guide cavity is slidably connected with a secondary latch.

[0006] Preferably, the surfaces of the main pin and the auxiliary pin are fixedly connected with force-loading plates, and the side surfaces of the force-loading plates are fixedly connected with compression springs. The position of the compression springs can be constrained by the force-loading plates, and the linkage between the compression springs and the main pin and the auxiliary pin can be achieved.

[0007] Preferably, a socket is provided on the side surface of the main pin, and the auxiliary pin is plugged into the inner wall of the socket. Through the cooperation between the main pin and the auxiliary pin, the saw blade can be restricted in the chuck under the constraint of the compression spring and the load-bearing plate.

[0008] Preferably, the force-carrying plate is slidably connected to the inner wall of the guide cavity, and the compression spring is fixedly connected to the inner wall of the guide cavity, so that the force-carrying plate can be pushed to move in a state of losing pressure through the compression spring.

[0009] Preferably, an auxiliary component is provided on the surface of the chuck, and the auxiliary component includes a knob, and the knob is mounted on the surface of the chuck, the inner wall of the knob is provided with a slot, the surface of the chuck is provided with a limiting slot, the surface of the chuck is sleeved with a torsion spring, the surface of the chuck is bolted with a baffle, and the inner wall of the knob is provided with a guide slot, and the position of the main pin and the auxiliary pin can be constrained by the knob, thereby achieving the binding of the pins on both sides.

[0010] Preferably, the torsion spring is plugged into the inner wall of the slot, the torsion spring is plugged into the inner wall of the limit slot, and the knob is sleeved with the surface of the torsion spring. The position of the knob can be constrained by the torsion spring, and the knob can be driven to reset itself after it is rotated.

[0011] Preferably, the baffle is rotatably connected to the inner wall of the knob, and there are two guide grooves, which are arranged in a circular array about the knob. The guide groove is adapted to the main pin, and the other guide groove is adapted to the auxiliary pin. The position of the knob can be limited to the chuck surface by the baffle, and the firmness of the knob can be improved.

[0012] Compared with the prior art, the advantages and positive effects of the utility model are:

[0013] In the utility model, by providing a binding component and an auxiliary component, when the saw blade needs to be replaced, the knob is rotated counterclockwise, the knob is subjected to force to twist the torsion spring, and at the same time the torsion spring is subjected to force and deformed under the obstruction of the limit groove. During the rotation of the knob, the restriction on the main latch pin and the auxiliary latch pin is gradually lost. When the main latch pin and the auxiliary latch pin lose the restriction on the force-bearing plates on both sides respectively, the force-bearing plates on both sides lose the pressure applied to the compression springs respectively. When the compression springs lose the pressure, they rebound and push the force-bearing plates. Under the action of the compression springs, the force-bearing plates push the column latch pin and the auxiliary latch pin respectively. When the latch pins on both sides are completely separated from the insertion hole of the saw blade, the saw blade can be removed. By providing the binding component and the auxiliary component, the stroke of the latch pin of the replacement structure is shortened, and the problem of the reset structure being prone to jamming when a single torsion spring is used as the reset member is reduced, and the stability of the replacement structure is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model provides a three-dimensional structural schematic diagram of a saw blade replacement structure of an arc-shaped reciprocating saw;

[0015] Figure 2 This is a bottom view structural schematic diagram of a saw blade replacement structure of an arc-shaped reciprocating saw proposed by the utility model;

[0016] Figure 3 The utility model provides a cross-sectional structural schematic diagram of a saw blade replacement structure of an arc-shaped reciprocating saw;

[0017] Figure 4 The utility model proposes a saw blade replacement structure for an arc-shaped reciprocating saw. Figure 3 Schematic diagram of the structure at A in the middle;

[0018] Figure 5 The utility model provides a partial structural schematic diagram of a saw blade replacement structure of an arc-shaped reciprocating saw.

[0019] Legend:

[0020] 1. Connecting rod; 2. Clamp; 3. Restraining assembly; 31. Guide cavity; 32. Main latch; 33. Secondary latch; 34. Load plate; 35. Compression spring; 4. Auxiliary assembly; 41. Knob; 42. Slot; 43. Limiting slot; 44. Torsion spring; 45. Baffle plate; 46. Guide slot. DETAILED DESCRIPTION

[0021] See also Figure 1-5 The utility model provides a technical solution: a saw blade replacement structure for an arc-shaped reciprocating saw, comprising a connecting rod 1, a chuck 2 and a restraining assembly 3, the chuck 2 is fixedly connected to the side surface of the connecting rod 1, the restraining assembly 3 is arranged on the surface of the chuck 2, and an auxiliary assembly 4 is arranged on the surface of the chuck 2.

[0022] The specific settings and functions of the restraining component 3 and the auxiliary component 4 are described in detail below.

[0023] In this embodiment: the restraining assembly 3 includes a main latch 32 , a guide cavity 31 is formed on the arc surface of the chuck 2 , the main latch 32 is slidably connected to the inner wall of the guide cavity 31 , and a secondary latch 33 is slidably connected to the inner wall of the guide cavity 31 .

[0024] Specifically, the surfaces of the main pin 32 and the auxiliary pin 33 are fixedly connected with a force-carrying plate 34, and the side surface of the force-carrying plate 34 is fixedly connected with a compression spring 35. The position of the compression spring 35 can be constrained by the force-carrying plate 34, and the linkage between the compression spring 35 and the main pin 32 and the auxiliary pin 33 can be realized.

[0025] Specifically, a plug hole is formed on the side surface of the main latch 32, and the auxiliary latch 33 is plugged into the inner wall of the plug hole.

[0026] In this embodiment, the saw blade can be restricted in the chuck 2 by the cooperation between the main latch 32 and the auxiliary latch 33 under the restraint of the compression spring 35 and the load-carrying plate 34 .

[0027] Specifically, the force-carrying plate 34 is slidably connected to the inner wall of the guide cavity 31 , and the compression spring 35 is fixedly connected to the inner wall of the guide cavity 31 . The compression spring 35 can push the force-carrying plate 34 to move when the pressure is lost.

[0028] In this embodiment: the auxiliary component 4 includes a knob 41, which is installed on the surface of the chuck 2. The inner wall of the knob 41 is provided with a slot 42, the surface of the chuck 2 is provided with a limiting slot 43, the surface of the chuck 2 is sleeved with a torsion spring 44, the surface of the chuck 2 is bolted with a baffle 45, and the inner wall of the knob 41 is provided with a guide slot 46.

[0029] In this embodiment, the positions of the main latch 32 and the auxiliary latch 33 can be constrained by the knob 41, thereby achieving the binding of the latches on both sides.

[0030] Specifically, the torsion spring 44 is plugged into the inner wall of the slot 42, the torsion spring 44 is plugged into the inner wall of the limit slot 43, and the knob 41 is sleeved onto the surface of the torsion spring 44. The position of the knob 41 can be constrained by the torsion spring 44, and the knob 41 can be driven to reset itself after the knob 41 is rotated.

[0031] Specifically, the baffle 45 is rotatably connected to the inner wall of the knob 41 , and there are two guide grooves 46 , which are arranged in a circular array about the knob 41 . The guide groove 46 is matched with the main latch 32 , and the other guide groove 46 is matched with the auxiliary latch 33 .

[0032] In this embodiment, the position of the knob 41 can be limited to the surface of the chuck 2 by the baffle 45 , and the firmness of the knob 41 can be improved.

[0033] Working principle: when the saw blade needs to be replaced, the knob 41 is rotated counterclockwise, and the knob 41 is subjected to force to twist the torsion spring 44. At the same time, the torsion spring 44 is deformed under the obstruction of the limit groove 43. During the rotation of the knob 41, the restriction on the main latch 32 and the auxiliary latch 33 is gradually lost. When the main latch 32 and the auxiliary latch 33 lose the restriction on the load-bearing plates 34 on both sides, the load-bearing plates 34 on both sides lose the pressure applied to the compression springs 35. The compression springs 35 rebound when losing the pressure and push the load-bearing plates 34. Under the action of the compression springs 35, the load-bearing plates 34 push the column latch and the auxiliary latch 33 respectively. When the latches on both sides are completely separated from the insertion hole of the saw blade, the saw blade can be removed. By setting the restraining component 3 and the auxiliary component 4, the stroke of the replacement structure latch is shortened, and the problem of the reset structure being prone to jamming when a single torsion spring 44 is used as the reset member is reduced, and the stability of the replacement structure is further improved.

Claims

1. A saw blade replacement structure for an arc-shaped reciprocating saw, comprising a connecting rod (1), a chuck (2) and a restraining assembly (3), characterized in that: The chuck (2) is fixedly connected to the side surface of the connecting rod (1), the restraining assembly (3) is arranged on the surface of the chuck (2), the restraining assembly (3) includes a main retaining pin (32), the arc surface of the chuck (2) is provided with a guide cavity (31), the main retaining pin (32) is slidably connected to the inner wall of the guide cavity (31), and the inner wall of the guide cavity (31) is slidably connected to a secondary retaining pin (33).

2. The saw blade replacement structure of an arc reciprocating saw according to claim 1, characterized in that: The surfaces of the main latch pin (32) and the auxiliary latch pin (33) are both fixedly connected with a force-carrying plate (34), and the side surface of the force-carrying plate (34) is fixedly connected with a compression spring (35).

3. The saw blade replacement structure of an arc reciprocating saw according to claim 1, characterized in that: The side surface of the main latch pin (32) is provided with an insertion hole, and the auxiliary latch pin (33) is plugged into the inner wall of the insertion hole.

4. The saw blade replacement structure of an arc reciprocating saw according to claim 2, characterized in that: The force-carrying plate (34) is slidably connected to the inner wall of the guide cavity (31), and the compression spring (35) is fixedly connected to the inner wall of the guide cavity (31).

5. The saw blade replacement structure of an arc reciprocating saw according to claim 1, characterized in that: The surface of the chuck (2) is provided with an auxiliary component (4), the auxiliary component (4) comprises a knob (41), the knob (41) is mounted on the surface of the chuck (2), the inner wall of the knob (41) is provided with a slot (42), the surface of the chuck (2) is provided with a limit slot (43), the surface of the chuck (2) is sleeved with a torsion spring (44), the surface of the chuck (2) is bolted with a baffle (45), and the inner wall of the knob (41) is provided with a guide slot (46).

6. The saw blade replacement structure of an arc reciprocating saw according to claim 5, characterized in that: The torsion spring (44) is plugged into the inner wall of the clamping slot (42), the torsion spring (44) is plugged into the inner wall of the limiting slot (43), and the knob (41) is sleeved onto the surface of the torsion spring (44).

7. The saw blade replacement structure of an arc-shaped reciprocating saw according to claim 5, characterized in that: The baffle (45) is rotatably connected to the inner wall of the knob (41), the number of the guide grooves (46) is two, the two guide grooves (46) are arranged in a circular array about the knob (41), the guide groove (46) is adapted to the main detent (32), and the other guide groove (46) is adapted to the auxiliary detent (33).

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