Saw blade dismounting structure and band saw

Abstract

This utility model discloses a saw blade assembly / disassembly structure and a rail saw, including a grip, an operating component, a linkage mechanism, and a locking shaft component. The operating component has a rotating part, which is rotatably connected to the grip. The operating component can be rotated to a locked position and an unlocked position. The linkage mechanism includes a transmission link and a sliding push rod. The rotating part has a first pivot joint with one end of the transmission link, and the other end of the transmission link has a second pivot joint with the sliding push rod. The sliding push rod is slidably connected to the grip. The locking shaft component is drively connected to the sliding push rod and has a locking hole and a clearance hole that communicate with each other. The locking hole is located near the sliding push rod. When the operating component is rotated to the locked position, the rotating part, the first pivot joint, the second pivot joint, and the locking hole are approximately on the same straight line, achieving self-locking and making operation convenient. When unlocking, the operating component is rotated to the unlocked position, and the clearance hole can avoid the transmission shaft, allowing the saw body to operate normally.

Description

Technical Field

[0001] This utility model relates to the field of electric saw technology, and in particular to a saw blade disassembly and assembly structure and a rail saw. Background Technology

[0002] Currently, when replacing or maintaining the saw blade on a rail saw, the drive shaft of the saw blade needs to be securely locked before the saw blade can be disassembled, and this also prevents accidental restarting. In existing technology, the locking structure responsible for locking the drive shaft is generally a locking block that slides along the saw body and a return spring that drives the locking block. The operator needs to continuously push the locking block to engage with the drive shaft to lock it, and it lacks a self-locking function. Therefore, throughout the disassembly process, the operator needs to continuously apply force to the locking block, which greatly limits the operator's flexibility when replacing the saw blade, making the operation quite inconvenient. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a saw blade disassembly and assembly structure, which can solve the problem of inconvenient operation in disassembling and assembling saw blades.

[0004] According to a first aspect embodiment of the present invention, a saw blade assembly / disassembly structure includes: a grip, an operating component, a linkage mechanism, and a locking shaft component. The operating component has a rotating part, which is rotatably connected to the grip. The operating component can rotate to a locked position and an unlocked position. The linkage mechanism includes a transmission link and a sliding push rod. The rotating part has a first pivot portion circumferentially connected to one end of the transmission link, and the other end of the transmission link has a second pivot portion connected to the sliding push rod. The sliding push rod is slidably connected to the grip. The locking shaft component is drively connected to the sliding push rod. The locking shaft component has a locking hole and a clearance hole that are interconnected. The locking hole is located near the sliding push rod. When the operating member is rotated to the locked position, the rotating part, the first pivot part, the second pivot part, and the locking hole are approximately on the same straight line. The locking shaft component can be moved to the point where the locking hole engages with the transmission shaft for transmission with the saw blade, thereby restricting the rotation of the transmission shaft. When the operating member is rotated to the unlocked position, the locking shaft component can be moved to the point where the transmission shaft falls into the clearance hole, and the transmission shaft can rotate within the clearance hole.

[0005] The saw blade disassembly and assembly structure according to this utility model embodiment has at least the following beneficial effects: When it is necessary to disassemble the saw blade, the operating member can be rotated to the locked position. At this time, the operating member can move in conjunction with the transmission linkage and the sliding push rod, and drive the locking hole to engage with the transmission shaft to achieve shaft locking. At this time, the rotating part, the first pivot part, the second pivot part, and the locking hole are approximately on the same straight line, which can form a dead point and achieve self-locking. The operator does not need to continuously operate the operating member, making the operation more convenient. When unlocking, the operating member is rotated to the unlocked position, the locking hole disengages from the transmission shaft, and the clearance hole can avoid the transmission shaft, allowing the saw body to operate normally.

[0006] According to some embodiments of the present invention, an elastic element is provided between the sliding push rod and the locking shaft.

[0007] According to some embodiments of the present invention, the sliding push rod has a groove extending along the extension direction of the sliding push rod, the elastic element is disposed in the groove, the locking shaft is provided with a transmission part, the transmission part is slidably connected to the groove, and one end of the elastic element abuts against the side wall of the groove, and the other end abuts against the transmission part.

[0008] According to some embodiments of the present invention, the opening of the slide groove is provided with a partition, which can divide the slide groove into a first groove segment and a second groove segment, and the transmission part can be slidably connected with the first groove segment or the second groove segment.

[0009] According to some embodiments of this utility model, the locking shaft is configured as a sheet structure, and the transmission part is configured as a folded edge.

[0010] According to some embodiments of the present invention, the locking hole has two parallel limiting edges that extend along the sliding direction of the sliding push rod, and the transmission shaft has a hexagonal limiting platform. In the locked position, the limiting edges can abut against the side wall of the limiting platform to restrict the rotation of the transmission shaft.

[0011] According to some embodiments of the present invention, the operating member has a latching section and an extension section. One end of the extension section is provided with the rotating part, and the other end is provided with the latching section. In the unlocked position, the latching section can engage with the grip.

[0012] According to some embodiments of the present invention, in the unlocked position, the outer surface of the operating element is approximately flush with the outer surface of the grip.

[0013] According to a second aspect of the present invention, a rail saw includes a rail saw employing the above-described saw blade disassembly and assembly structure.

[0014] The rail saw according to the present utility model embodiment has at least the following beneficial effects: by adopting the above-mentioned saw blade disassembly and assembly structure, the operating component can be self-locking, making the saw blade shaft self-locking, which makes disassembly and assembly of the saw blade more convenient and easier for users to use.

[0015] According to some embodiments of the present invention, it further includes a drive motor, a gear transmission structure and a saw blade shaft disposed on the grip, wherein the output shaft of the drive motor is configured as the transmission shaft, the transmission shaft meshes with the input end of the gear transmission structure for transmission, and the saw blade shaft meshes with the output end of the gear transmission structure for transmission.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 A schematic diagram of the internal structure of an embodiment for unlocking a rail saw;

[0019] Figure 2 This is a structural schematic diagram of the embodiment where the operating element is in the unlocked position;

[0020] Figure 3 A schematic diagram of the internal structure of a track saw locking embodiment;

[0021] Figure 4 A schematic diagram of the structure of the operating element in the locked position according to an embodiment;

[0022] Figure 5 for Figure 4 A schematic diagram from another direction;

[0023] Figure 6 This is a schematic diagram of the overall structure of a rail saw.

[0024] Figure label:

[0025] Holding base 100;

[0026] Operating component 200, rotating part 210, first pivot part 220, snap-fit ​​section 230, extension section 240;

[0027] Linkage mechanism 300, transmission link 310, sliding push rod 320, slide groove 321, first groove segment 3211, second groove segment 3212, partition 322, second pivot part 330, elastic element 340;

[0028] Locking shaft component 400, locking hole 410, limiting edge 411, clearance hole 420, transmission part 430;

[0029] Transmission shaft 500, limit stage 510;

[0030] Drive motor 610, gear transmission structure 620, saw blade shaft 630. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0032] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Reference Figures 1 to 5According to a first aspect embodiment of the present invention, the saw blade assembly / disassembly structure includes a grip 100, an operating member 200, a linkage mechanism 300, and a locking shaft member 400. The operating member 200 has a rotating part 210, which is rotatably connected to the grip 100. The operating member 200 can rotate to a locked position and an unlocked position. The linkage mechanism 300 includes a transmission link 310 and a sliding push rod 320. The rotating part 210 is circumferentially provided with a first pivot part 220 between itself and one end of the transmission link 310. The other end of the transmission link 310 is directly provided with a second pivot part 330 between itself and the sliding push rod 320. The sliding push rod 320 is slidably connected to the grip 100. The locking shaft member 400 is connected to the sliding push rod 320. 20. The transmission connection includes a locking shaft 400 with a locking hole 410 and a clearance hole 420 communicating with each other. The locking hole 410 is located on the side near the sliding push rod 320. When the operating member 200 is rotated to the locked position, the rotating part 210, the first pivot part 220, the second pivot part 330 and the locking hole 410 are approximately on the same straight line. The locking shaft 400 can be moved to the point where the locking hole 410 engages with the transmission shaft 500 for transmission connection with the saw blade, thereby restricting the rotation of the transmission shaft 500. When the operating member 200 is rotated to the unlocked position, the locking shaft 400 can be moved to the point where the transmission shaft 500 falls into the clearance hole 420, and the transmission shaft 500 can rotate within the clearance hole 420. When the saw blade needs to be disassembled, the operating member 200 can be rotated to the locked position. At this time, the operating member 200 can move in conjunction with the transmission linkage 310 and the sliding push rod 320, and drive the locking hole 410 to engage with the transmission shaft 500 to lock the shaft. At this time, the rotating part 210, the first pivot part 220 and the second pivot part 330 are roughly on the same straight line, which can form a dead point and achieve self-locking. The operator does not need to continuously operate the operating member 200, making the operation more convenient. When unlocking, the operating member 200 is rotated to the unlocked position. The locking hole 410 disengages from the transmission shaft 500, and the clearance hole 420 can avoid the transmission shaft 500, allowing the saw body to operate normally.

[0035] Specifically, the grip 100 is for the operator to hold, and the operating component 200 is set on the grip 100, allowing the operator to directly operate the operating component 200. When the saw blade needs to be disassembled or assembled, the operator only needs to rotate the operating component 200 to the locked position. At this time, the operating component 200 drives the transmission linkage 310 to swing, and can drive the sliding push rod 320 to slide in the direction of its sliding connection with the grip 100. It can be understood that the sliding direction of the sliding push rod 320 is set to either towards the transmission shaft 500 or away from the transmission shaft 500. When locked, the sliding push rod 320 can slide towards the transmission shaft 500, and drive the locking shaft component 400 to move towards the transmission shaft 500, so that the locking hole 410 near the sliding push rod 320 can be engaged with the transmission shaft 500. After the locking hole 410 cooperates with the transmission shaft 500, it can restrict the rotation of the transmission shaft 500. The specific limiting structure is not limited here. When locked, the rotating part 210, the first pivot part 220, the second pivot part 330, and the locking hole 410 are approximately on the same straight line, forming a dead point position, thus creating a self-locking effect. This eliminates the need for the operator to continuously apply force to the operating part 200, facilitating the assembly and disassembly of the saw blade and making operation more convenient. When unlocked, simply rotate the operating part 200 to the unlocked position. At this time, the locking hole 410 can disengage from the transmission shaft 500. The clearance hole 420 has a larger diameter, allowing the transmission shaft 500 to rotate freely within the clearance hole 420, enabling the saw body to operate normally.

[0036] Reference Figures 1 to 5 In some embodiments of this utility model, an elastic element 340 is provided between the sliding push rod 320 and the locking shaft 400. Specifically, the elastic element 340 can be a spring, and the locking shaft 400 and the sliding push rod 320 can be softly connected through the elastic element 340, thereby enabling the locking shaft 400 and the transmission shaft 500 to have a soft fit, which can protect the transmission shaft 500 and the lock hole.

[0037] Reference Figures 1 to 5 In some embodiments of this utility model, the sliding push rod 320 has a groove 321 extending along the extension direction of the sliding push rod 320. An elastic element 340 is disposed in the groove 321, and the locking shaft member 400 has a transmission part 430. The transmission part 430 is slidably connected to the groove 321, and one end of the elastic element 340 abuts against the side wall of the groove 321, while the other end abuts against the transmission part 430. Specifically, the sliding push rod 320 can slide along its extension direction, and the elastic element 340 can be a spring disposed in the groove 321. When the sliding push rod 320 slides, it can drive the elastic element 340 to cooperate with the transmission part 430, thereby driving the transmission part 430 to slide along the groove 321, and thus driving the locking shaft member 400 to slide. With the above structure, the elastic element 340 can be easily assembled, and smooth transmission can be achieved.

[0038] Reference Figures 1 to 5 In some embodiments of this utility model, a partition 322 is provided at the opening of the slide groove 321, which can divide the slide groove 321 into a first groove segment 3211 and a second groove segment 3212. The transmission part 430 can be slidably connected to the first groove segment 3211 or the second groove segment 3212. Specifically, the first groove segment 3211 can be set to the side closer to the operating member 200. When the transmission part 430 is slidably connected to the first groove segment 3211, the elastic member 340 has a large degree of compression, a large elastic force, and a greater transmission force. When the transmission part 430 is slidably connected to the second groove segment 3212, the elastic member 340 has a small degree of compression, and the transmission is more gentle. Users can switch according to their needs for convenient use.

[0039] Reference Figures 1 to 5 In some embodiments of this utility model, the locking shaft component 400 is a sheet-like structure, and the transmission part 430 is a folded edge. Specifically, the locking shaft component 400 can be made by stamping and punching a metal sheet, while the transmission part 430 can be a folded edge that can be inserted into the sliding groove 321 and abut against the elastic member 340. This structure reduces the production cost of the locking shaft component 400.

[0040] Reference Figures 1 to 5 In some embodiments of this utility model, the locking hole 410 has two parallel limiting edges 411, which extend along the sliding direction of the sliding push rod 320. The transmission shaft 500 has a hexagonal limiting platform 510. In the locked position, the limiting edges 411 can abut against the side wall of the limiting platform 510 to restrict the rotation of the transmission shaft 500. Specifically, the limiting platform 510 is designed with a hexagonal structure, and the two limiting edges 411 of the locking hole 410 can abut against the opposite side wall of the limiting platform 510, thereby restricting the rotation of the transmission shaft 500. It is understood that when locked, the two limiting edges 411 of the locking hole 410 may not be aligned with the side wall of the limiting platform 510. Therefore, by providing the elastic element 340, under the action of the elastic force, the locking shaft element 400 can drive the transmission shaft 500 to rotate a certain angle, thereby enabling the limiting edges 411 to align and engage with the side wall of the limiting platform 510.

[0041] Reference Figures 1 to 5In some embodiments of this utility model, the operating member 200 has a latching section 230 and an extension section 240. One end of the extension section 240 is provided with a rotating part 210, and the other end is provided with the latching section 230. In the unlocked position, the latching section 230 can engage with the grip base 100. Specifically, a latching structure can be provided between the latching section 230 and the grip base 100. The extension section 240 can increase the lever arm, which can reduce the force applied by the user to the latching section 230, making operation easier. In the unlocked position, the latching section 230 and the grip base 100 can be latched and limited, so that the operating member 200 will not loosen and disengage from the unlocked position.

[0042] In some embodiments of this invention, in the unlocked position, the outer surface of the operating member 200 is approximately flush with the outer surface of the grip base 100, to facilitate gripping by the operator.

[0043] Reference Figure 6 According to a second aspect embodiment of the present invention, a rail saw includes a rail saw employing the above-described saw blade disassembly and assembly structure. By employing the above-described saw blade disassembly and assembly structure, the operating member 200 can self-lock, thereby self-locking the saw blade shaft 630, making the disassembly and assembly of the saw blade more convenient and easier for the user to use.

[0044] Reference Figure 1 and Figure 3 In some embodiments of this utility model, the device further includes a drive motor 610, a gear transmission structure 620, and a saw blade shaft 630 disposed on the grip 100. The output shaft of the drive motor 610 is configured as the transmission shaft 500, which meshes with the input end of the gear transmission structure 620. The saw blade shaft 630 meshes with the output end of the gear transmission structure 620. Specifically, the gear transmission structure 620 increases the torque of the saw blade shaft 630. Therefore, when the output shaft of the drive motor 610 is used in conjunction with the locking shaft member 400, the torque is relatively small, and the strength requirements for the locking shaft member 400 and the linkage mechanism 300 are relatively low.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0046] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A saw blade dismounting structure, characterized by, include: Holding base (100); The operating member (200) is provided with a rotating part (210), the rotating part (210) is rotatably connected to the grip (100), and the operating member (200) can be rotated to a locked position and an unlocked position; The linkage mechanism (300) includes a transmission link (310) and a sliding push rod (320). The rotating part (210) is circumferentially provided with a first pivot part (220) between one end of the transmission link (310) and the other end of the transmission link (310) is provided with a second pivot part (330) between the sliding push rod (320). The sliding push rod (320) is slidably connected to the grip (100). A locking shaft (400) is connected to the sliding push rod (320) in a transmission manner. The locking shaft (400) is provided with a locking hole (410) and a clearance hole (420) that are interconnected. The locking hole (410) is located on the side close to the sliding push rod (320). When the operating member (200) is rotated to the locked position, the rotating part (210), the first pivot part (220), the second pivot part (330) and the locking hole (410) are approximately on the same straight line, and the locking shaft member (400) can move to engage with the transmission shaft (500) for transmission connection with the saw blade in the locking hole (410) to restrict the rotation of the transmission shaft (500). When the operating member (200) is rotated to the unlocked position, the locking shaft member (400) can move to allow the transmission shaft (500) to fall into the clearance hole (420), and the transmission shaft (500) can rotate in the clearance hole (420).

2. The saw blade mounting structure according to claim 1, wherein An elastic element (340) is provided between the sliding push rod (320) and the locking shaft (400).

3. The saw blade mounting structure according to claim 2, wherein The sliding push rod (320) has a groove (321) inside, the groove (321) extends along the extension direction of the sliding push rod (320), the elastic element (340) is provided in the groove (321), the locking shaft (400) is provided with a transmission part (430), the transmission part (430) is slidably connected to the groove (321), and one end of the elastic element (340) abuts against the side wall of the groove (321), and the other end abuts against the transmission part (430).

4. The saw blade mounting structure according to claim 3, wherein The opening of the slide (321) is provided with a partition (322), which can divide the slide (321) into a first groove segment (3211) and a second groove segment (3212). The transmission part (430) can be slidably connected with the first groove segment (3211) or the second groove segment (3212).

5. The saw blade removable structure according to claim 3, wherein The locking shaft (400) is a sheet-like structure, and the transmission part (430) is a folded edge.

6. The saw blade removable structure according to claim 2, wherein The locking hole (410) has two parallel limiting edges (411) that extend along the sliding direction of the sliding push rod (320). The transmission shaft (500) has a hexagonal limiting platform (510). In the locked position, the limiting edge (411) can abut against the side wall of the limiting platform (510) to restrict the rotation of the transmission shaft (500).

7. The saw blade removable structure according to claim 1, wherein The operating component (200) has a latching section (230) and an extension section (240). One end of the extension section (240) is provided with the rotating part (210), and the other end is provided with the latching section (230). In the unlocked position, the latching section (230) can engage with the grip (100).

8. The saw blade removal structure according to claim 1, wherein In the unlocked position, the outer surface of the operating element (200) is substantially flush with the outer surface of the grip (100).

9. A track saw, characterized in that The saw blade disassembly and assembly structure includes any one of claims 1-8.

10. The band saw of claim 9, wherein, It also includes a drive motor (610), a gear transmission structure (620) and a saw blade shaft (630) disposed on the grip (100). The output shaft of the drive motor (610) is set as the transmission shaft (500). The transmission shaft (500) meshes with the input end of the gear transmission structure (620) for transmission, and the saw blade shaft (630) meshes with the output end of the gear transmission structure (620) for transmission.

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