Saw blade clamping device and saw

Abstract

The application relates to the field of saws, in particular to a saw blade clamping device and a saw, the clamping device comprising a main body assembly, the main body assembly comprising a first connecting end and a second connecting end capable of relative movement in a first direction, the first connecting end being used for connecting with one of the connecting ends of a saw bow, and the second connecting end being used for connecting with one end of a saw blade; a locking assembly arranged on the main body assembly and used for locking the relative positions of the first connecting end and the second connecting end; the saw blade clamping device provided by the application can be used as a connecting component of the saw blade, that is, some short-size saw blades can be installed on the saw bow through the device, and the applicability is good; moreover, the design of the device can not reform the basic structure of the saw bow, that is, the first connecting end and the second connecting end of the device can be adapted to the two connecting ends of the saw bow to realize the connection.

Description

Technical Field

[0001] This application relates to the field of saws, and more particularly to a saw blade clamping device and a saw. Background Technology

[0002] Some saws in related technologies mainly consist of a saw bow and a long, strip-shaped saw blade (also called a saw strip) installed in the middle of the saw bow. The installation structure of the saw blade and the saw bow mainly involves two locating pins at both ends of the saw bow, and correspondingly, two mounting holes at both ends of the saw blade for the locating pins to be inserted. Of the two locating pins on the saw bow, one is a fixed locating pin and the other is a movable locating pin, which can move relative to the fixed locating pin. After the two locating pins are inserted into the mounting holes at both ends of the saw blade, the movable locating pin is adjusted to move towards the side that tensions the saw blade, thereby achieving installation. In this way, the saw blade is installed and tensioned between the two locating pins.

[0003] However, this type of saw with a saw blade mounted on a saw bow still has certain drawbacks in practical use. For example, since the saw blade is mounted between two locating pins on the saw bow, the saw bow can only accommodate saw blades of a certain length. That is, the length of the saw blade must be basically matched with the distance between the two locating pins. Although one of the locating pins is movable, it generally moves within a small range and is mainly used to tighten the saw blade. Therefore, some saw blades that are shorter in length (i.e., the distance between the two mounting holes on the saw blade is less than the minimum distance between the two locating pins on the saw bow) cannot be mounted on the saw bow. Based on this, how to design a device that can clamp shorter saw blades onto the saw bow is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In order to solve at least one of the technical problems mentioned in the background art, the purpose of this application is to provide a saw blade clamping device and a saw.

[0005] To achieve the above objectives, this application provides the following technical solution.

[0006] On one hand, this application provides a saw blade clamping device for clamping a saw blade onto a saw bow, the saw bow including two connecting ends spaced apart along a first direction for mounting the saw blade, the clamping device including: The main body component includes a first docking end and a second docking end that are movable relative to each other in a first direction. The first docking end is used to dock with one of the connecting ends of the saw bow, and the second docking end is used to dock with one end of the saw blade. A locking assembly, disposed on the main body assembly, is used to lock the relative positions of the first mating end and the second mating end.

[0007] As an optional embodiment of this application, the connecting end includes a first positioning pin; the first mating end includes a positioning hole into which the positioning pin can be inserted; and / or the second mating end includes a second positioning pin, which can be inserted into a mounting hole on the end side of the saw blade.

[0008] As an optional implementation of this application, the main component includes: A first component, wherein a channel is provided in the first component, one end of the channel is open to form an open end, and the end of the first component away from the open end of the channel forms the first docking end; The second component passes through the channel and is capable of sliding relative to the first component within the channel along the channel's axial direction; the end of the second component away from the channel forms the second mating end.

[0009] As an optional embodiment of this application, the locking assembly includes a locking member and a first nut. The locking member is fixed relative to the second member, and the locking member at least partially protrudes from the outer peripheral wall of the first member to form a stop. The first nut is threaded onto the outer peripheral wall of the first member, wherein the first nut is configured such that when the first nut rotates circumferentially relative to the first member, the first nut can move axially along the channel to push against the stop. When the first nut abuts against the stop, the second member is restricted from moving away from the first member in the axial direction of the channel.

[0010] As an optional embodiment of this application, the outer peripheral wall of the first component is a circular wall, and the outer peripheral wall of the first component is provided with a threaded segment that extends along the axial direction of the first component and is adapted to the first nut.

[0011] As an optional embodiment of this application, a guide groove is provided on the peripheral wall of the first component, which radially penetrates the first component and extends along the length direction of the first component; the locking component at least partially protrudes from the guide groove to form the stop portion.

[0012] As an optional embodiment of this application, the side wall of the stop portion facing the first nut is provided with a rolling ball, and the stop portion abuts against the end of the first nut through the ball.

[0013] On the other hand, this application provides a saw, including a saw bow and a saw blade. The saw bow includes two connecting ends spaced apart along a first direction. The saw also includes the aforementioned saw blade clamping device. Of the two connecting ends of the saw bow, one is connected to a first end of the saw blade, and the other is connected to a first mating end of a main body assembly. The second mating end of the main body assembly is connected to a second end of the saw blade.

[0014] As an optional implementation of this application, at least one of the two connecting ends is movable and adjustable relative to the saw bow along a first direction to serve as a movable connecting end.

[0015] As an optional embodiment of this application, the saw is a handsaw, and one side of the saw bow is provided with a handle for a person to hold; or the saw is an electric saw, and the saw further includes a drive mechanism for driving the saw bow to reciprocate along a first direction.

[0016] Compared with the prior art, this application has the following advantages: The saw blade clamping device provided in this application can be used as a saw blade transfer component. That is, some shorter saw blades can be installed on the saw bow through this device, which has good applicability.

[0017] Moreover, the design of this device does not require modification to the basic structure of the saw bow; that is, the first and second docking ends of the device can be adapted to the two connecting ends of the saw bow itself to achieve docking.

[0018] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0019] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings. Several embodiments of this application are illustrated in the drawings by way of example and not limitation, in which: In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

[0020] Figure 1 A schematic diagram of the structure of Embodiment 2 of this application is shown. Figure 1 ; Figure 2 A partial exploded view of Embodiment 2 of this application is shown; Figure 3 A schematic diagram of the structure of Embodiment 1 of this application is shown; Figure 4 An exploded view of Embodiment 1 of this application is shown.

[0021] Explanation of the labels in the diagram: 1. Saw bow; 11. Movable connecting end; 110. First locating pin; 111. Screw; 112. Second nut; 12. Movable connecting end; 13. Handle; 2. Saw blade; 21. Mounting hole; 3. Main component; 31. First component; 311. Positioning hole; 312. Guide groove; 32. Second component; 321. Second positioning pin; 322. Sliding part; 323. Stop part; 324. Ball bearing; 33. First nut. Detailed Implementation

[0022] To make the objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] Example 1 This embodiment provides a saw blade clamping device, which is mainly applicable to bow saws. The bow saw can be either manual or electric, and no specific limitation is made here.

[0024] To provide a better understanding of this embodiment, we will first give a brief description of this bow saw, which mainly includes a bow-shaped saw bow 1, with the two ends of the saw bow 1 serving as connecting ends.

[0025] In related technologies, both connecting ends are pin structures, i.e., positioning pins; like Figure 1 As shown, of the two connecting ends of the saw bow 1, one is a fixed connecting end and the other is a movable connecting end 11. The fixed connecting end remains fixed relative to the saw bow 1, while the movable connecting end 11 can move relative to the saw bow 1 in a first direction to move away from or closer to the fixed connecting end.

[0026] It is worth noting that the first direction claimed in this embodiment is based on the assembly state formed by assembling the saw blade 2 and locking it onto the saw bow 1. That is, the first direction can be understood as the length direction of the saw blade 2 in the assembly state.

[0027] In some embodiments, the active connection terminal 11 is specifically constructed as follows: Figure 1 As shown, the movable connection end 11 mainly includes a screw 111 and a second nut 112. The screw 111 extends along a first direction and is threadedly connected to the first end of the saw bow 1. Of the two positioning pins, one positioning pin is fixed to the second end of the saw bow 1, and the other positioning pin is fixed to the inner part of the screw 111 located on the saw bow 1.

[0028] The second nut 112 is threaded onto the screw 111 and is located on the outside of the first end of the saw bow 1. The saw blade 2 is basically long and narrow, with mounting holes 21 formed at both ends. During installation, the two mounting holes 21 of the saw blade 2 are respectively inserted into the two positioning pins. Then, the second nut 112 is rotated to drive the screw 111 to move away from the second end of the saw bow 1 along the first direction. In this way, the saw blade 2 is tightened between the two positioning pins, thus achieving installation.

[0029] Based on this, the saw blade 2 clamping device (hereinafter referred to as "this device") provided in this embodiment is essentially an adapter device, which can be used to clamp some shorter saw blades 2 onto the saw frame 1. This device is a component that can be used independently of the saw frame 1. It can be understood that for some saw blades 2 whose length can be adapted to the saw frame 1, this device is not needed, and the two ends of the saw blade 2 can be directly connected to the two positioning pins of the saw frame 1. However, for some saw blades 2 that are shorter in length and cannot be directly installed onto the saw frame 1 on their own, this device can be used as an adapter clamping component to achieve the clamping and installation of the saw blade 2.

[0030] To distinguish them, in this embodiment, as Figure 2 As shown, the two locating pins on the saw bow 1 are both designated as the first locating pin 110.

[0031] Specifically, this device mainly includes the main body component 3 and the locking component.

[0032] The main component 3 mainly includes a first docking end and a second docking end that can move relative to each other along a first direction.

[0033] The first docking end is used to dock with one of the connecting ends of the saw bow 1. For ease of understanding, this embodiment will use the docking of the first docking end with the movable connecting end 11 of the saw bow 1 as an example for explanation.

[0034] In order to mate with the first positioning pin 110 on the active connection end 11, in some embodiments, such as Figure 3 As shown, the first mating end includes a positioning hole 311 into which the first positioning pin 110 can be inserted. Preferably, the size of the positioning hole 311 is substantially the same as the size of the mounting hole 21 on the saw blade 2.

[0035] The second docking end is used to dock with the first end of the saw blade 2. Specifically, the second docking end docks with the mounting hole 21 at the first end of the saw blade 2. The mounting hole 21 at the second end of the saw blade 2 is used to be fitted into the first positioning pin 110 at the fixed connection end of the saw bow 1.

[0036] In some embodiments, the second mating end includes a second positioning pin 321 that can be inserted into the mounting hole 21 on the end side of the saw blade 2, and the diameter of the second positioning pin 321 is substantially the same as that of the first positioning pin 110.

[0037] In order to enable the first docking end and the second docking end to move relative to each other along the first direction, this embodiment provides a specific main body component 3, which is constructed as follows: Combination Figure 3 and Figure 4 As shown, the main component 3 includes a first component 31 and a second component 32; wherein the first component 31 has a channel through which the second component 32 can move; in some embodiments, the first component 31 is a hollow cylindrical tube structure, and its internal pipe forms the aforementioned channel; the end portion of the second component 32 is a cylindrical structure serving as a sliding part 322, which is slidably connected in the channel, and the portion of the second component 32 away from the sliding part 322 is cut off to form a flat surface.

[0038] The channel is open at one end to form an open end, and the first component 31 is provided with an ear plate at the end away from the open end of the channel. The aforementioned positioning hole 311 is provided on the ear plate to form a first docking end.

[0039] The second component 32 is inserted into the channel from the open end of the channel, and the second component 32 can slide relative to the first component 31 in the channel along the axial direction of the channel; in this embodiment, the axial direction of the channel can also be understood as the axial direction or length direction of the first component 31 and the second component 32. In the assembled state, the axial direction of the channel can also be understood as the aforementioned first direction.

[0040] The second component 32 is provided with the aforementioned second positioning pin 321 at the end away from the channel to form the aforementioned second docking end.

[0041] Thus, by extending and contracting the first component 31 and the second component 32 axially relative to each other, the relative movement adjustment of the positioning hole 311 and the second positioning pin 321 in the first direction can be achieved.

[0042] The locking component is located on the main body component 3 and is mainly used to lock the relative position of the first docking end and the second docking end. Locking the relative position here can be understood as locking the first docking end and the second docking end in the assembled state so that the saw blade 2 remains in a tensioned state.

[0043] This embodiment provides a specific locking assembly, which mainly includes a locking member and a first nut 33.

[0044] The locking member is fixed relative to the second member 32, so that the second member 32 and the locking member move synchronously in the first direction; in some embodiments, the locking member and the second member 32 can be integrally formed, or they can be two parts fixedly connected to each other.

[0045] Furthermore, the locking member at least partially protrudes from the outer peripheral wall of the first member 31 to form a stop portion 323, for example: A guide groove 312 is provided on the peripheral wall of the first component 31, which radially penetrates the first component 31 and extends along the length direction of the first component 31; the locking component at least partially protrudes from the guide groove 312 to form the stop portion 323.

[0046] In some embodiments, the locking member has an axial structure and is fixed on the sliding portion 322 of the first member 31, and the axial direction of the locking member is perpendicular to the axial direction of the sliding portion 322.

[0047] The locking member can move synchronously with the first member 31, that is, the locking member can slide in the guide groove 312; wherein the width of the guide groove 312 is adapted to the diameter of the locking member, and with the cooperation of the guide groove 312 and the locking member, the first member 31 and the second member 32 cannot rotate relative to each other in the circumferential direction.

[0048] The first nut 33 is threaded onto the outer peripheral wall of the first component 31. For example, the outer peripheral wall of the first component 31 is provided with a threaded section that extends axially along the first component 31 and is adapted to the first nut 33.

[0049] The first nut 33 is inserted into the first component 31 and is adapted to the threaded section of the first component 31. Thus, by rotating the first nut 33 circumferentially relative to the first component 31, the first nut 33 can move along the axial direction (i.e., the first direction) of the channel. The first nut 33 is located on the side of the stop part 323 away from the movable connection end 11 of the saw bow 1. Thus, when the first nut 33 moves towards the movable connection end 11, it can push the stop part 323 and the second component 32 together to move towards the movable connection end 11. Thus, the saw blade 2 is tensioned between the second positioning pin 321 and the first positioning pin 110 of the fixed connection end of the saw bow 1.

[0050] In other words, after assembly, the first nut 33 abuts against the stop part 323. Under the restriction of the first nut 33, the stop part 323 and the second component 32 are restricted from moving away from the first component 31 in the axial direction of the channel to prevent the saw blade 2 from loosening.

[0051] When installing the saw blade 2, the positioning hole 311 on the first component 31 is inserted into the first positioning pin 110 on the screw 111, the mounting hole 21 at the first end of the saw blade 2 is inserted into the first positioning pin 110 at the fixed connection end of the saw bow 1, and the mounting hole 21 at the second end of the saw blade 2 is inserted into the second positioning pin 321 on the second component 32. Then, the first nut 33 is rotated so that it moves to the side closer to the fixed connection end of the saw bow 1 (i.e., to the left). At this time, the first nut 33 will push the stop part 323 to the left, and the stop part 323 will move to the left along with the first component 31 and the second positioning pin 321. Since the right side of the saw blade 2 is fixed to the fixed connection end of the saw bow 1, the saw blade 2 will be gradually tightened as the stop part 323 moves to the left.

[0052] Of course, the saw blade 2 can also be tensioned by means of the screw 111. After the first nut 33 moves to a certain position, the screw 111 can be moved to the left by rotating the second nut 112, thus achieving the tensioning of the saw blade 2. The specific tensioning method can be selected according to actual needs, and no specific limitation is made here.

[0053] Since the first nut 33 rotates when pushing the stop 323, there will be a large sliding friction between the first nut 33 and the stop 323. In order to reduce friction, in some embodiments, the side wall of the stop 323 facing the first nut 33 is provided with a rolling ball 324. The stop 323 abuts against the end of the first nut 33 through the ball 324. In this way, the friction between the first nut 33 and the stop 323 is equivalent to the rolling friction between the first nut 33 and the ball 324, which helps to reduce friction.

[0054] Example 2 Reference Figures 1-4 As shown, this embodiment further provides a saw based on embodiment 1, which includes a saw bow 1, a saw blade 2, and a saw blade 2 clamping device provided in embodiment 1. The structure of the saw bow 1 and the saw blade 2 has been described in detail in embodiment 1, so it will not be repeated here. Please refer to the description of embodiment 1.

[0055] In the assembled state, one of the two connecting ends of the saw bow 1 is connected to the first end of the saw blade 2, and the other is connected to the first mating end of the main body component 3; the second mating end of the main body component 3 is connected to the second end of the saw blade 2.

[0056] That is, the first positioning pin 110 of the fixed connection end of the saw bow 1 is fitted into the mounting hole 21 at one end of the saw blade 2, and the mounting hole 21 at the other end of the saw blade 2 is fitted into the second positioning pin 321 on the end side of the second component 32; the positioning hole 311 on the end side of the first component 31 is fitted into the first positioning pin 110 of the movable connection end 11 of the saw bow 1. The saw blade 2 is tensioned by pushing the stop part 323 against the first nut 33.

[0057] It is worth noting that the saw provided in this embodiment can be either a hand saw or an electric saw, i.e., an electric saw.

[0058] If it is a handsaw, a handle 13 for a person to hold can be provided on one side of the saw bow 1.

[0059] If the saw is an electric saw, it also includes a drive mechanism for driving the saw bow 1 to reciprocate linearly along a first direction. That is, the saw bow 1 is mounted on the drive mechanism, and the drive mechanism drives the linear reciprocating movement to achieve the sawing action. There are many descriptions of this electric saw structure in the prior art regarding the saw bow 1 being mounted on the drive mechanism, so the specific structure of the drive mechanism will not be described in detail here.

[0060] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this application can be achieved, and this is not limited herein.

[0061] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0062] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A saw blade clamping device for clamping a saw blade onto a saw bow, the saw bow comprising two connecting ends spaced apart along a first direction for mounting the saw blade, characterized in that, The clamping device includes: The main body component includes a first docking end and a second docking end that are movable relative to each other in a first direction. The first docking end is used to dock with one of the connecting ends of the saw bow, and the second docking end is used to dock with one end of the saw blade. A locking assembly, disposed on the main body assembly, is used to lock the relative positions of the first mating end and the second mating end.

2. The saw blade clamping device according to claim 1, characterized in that, The connecting end includes a first positioning pin; the first mating end includes a positioning hole into which the positioning pin can be inserted; and / or the second mating end includes a second positioning pin, which can be inserted into a mounting hole on the end side of the saw blade.

3. The saw blade clamping device according to claim 1 or 2, characterized in that, The main components include: A first component, wherein a channel is provided in the first component, one end of the channel is open to form an open end, and the end of the first component away from the open end of the channel forms the first docking end; The second component passes through the channel and is capable of sliding relative to the first component within the channel along the channel's axial direction; the end of the second component away from the channel forms the second mating end.

4. The saw blade clamping device according to claim 3, characterized in that, The locking assembly includes a locking member and a first nut. The locking member is fixed relative to the second member. The locking member at least partially protrudes from the outer peripheral wall of the first member to form a stop. The first nut is threaded onto the outer peripheral wall of the first member. The first nut is configured such that when the first nut rotates circumferentially relative to the first member, the first nut can move axially along the channel to push against the stop. When the first nut abuts against the stop, the second member is restricted from moving away from the first member in the axial direction of the channel.

5. The saw blade clamping device according to claim 4, characterized in that, The outer peripheral wall of the first component is a circular wall, and the outer peripheral wall of the first component is provided with a threaded section that extends along the axial direction of the first component and is adapted to the first nut.

6. The saw blade clamping device according to claim 4, characterized in that, The first component has a guide groove that radially penetrates the first component and extends along the length of the first component on its peripheral wall; the locking component at least partially extends out of the guide groove to form the stop portion.

7. The saw blade clamping device according to claim 4, characterized in that, The stop part has a rolling ball on its sidewall facing the first nut, and the stop part abuts against the end of the first nut through the ball.

8. A saw, comprising a saw bow and a saw blade, the saw bow comprising two connecting ends spaced apart along a first direction, characterized in that, The saw also includes a saw blade clamping device as described in any one of claims 1-7, wherein one of the two connecting ends of the saw bow is connected to the first end of the saw blade and the other is connected to the first mating end of the main body assembly; the second mating end of the main body assembly is connected to the second end of the saw blade.

9. The saw according to claim 8, characterized in that, Of the two connecting ends, at least one can be moved and adjusted relative to the saw bow along a first direction to serve as a movable connecting end.

10. The saw according to claim 8, characterized in that, The saw is a handsaw, and one side of the saw bow is provided with a handle for a person to hold; or the saw is an electric saw, and the saw also includes a drive mechanism for driving the saw bow to reciprocate along a first direction.

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